Help Me Asap Please And Thank You!

Help Me Asap Please And Thank You!

Answers

Answer 1

In this case using the elimination method is actually easier, but the question asks you to use substitution method so....

2x+y= -10

3x-y=0

1st equation: It is better to isolate 2x on both sides because the y is going to be positive no matter what, 2x+y=-10 => y=-2x-10

If you isolated 3x for the 2nd equation, the y will be negative, and you have to divide the whole equation by -1 to make it positive

Now we got y=-2x-10, lets substitute it in the 2nd equation and solve for x:

3x-(-2x-10) = 0

5x+10=0

5x=-10

x=-2

Now lets solve for y:

3(-2)-y=0

-6-y=0

y=-6

Lets see if the same is applicable for 1st equation

2(-2)+(-6)=-10

-10=-10

Yess!!

(-2,-6) is the solution

The answer to the question is explained at the beginning

Hope it helps!


Related Questions

Robyn, Rachel and Rocky bought a set of LEGO blocks, Robyn paid $45, Rachel paid $65 and Rocky paid $60. What
fraction of the total amount Rocky paid?

Answers

Answer:

6/17

Step-by-step explanation:

Robyn paid $45,

Rachel paid $65

Rocky paid $60.

Total amount paid = $45 + $65 + $60 = $170

Fraction paid by Rocky will be:

= 60/170

= 6/17

the sewing and fabric shop sells different colored ribbons in meter lengths. laura pays £64.32 for 12 meters of blue ribbon. how much does the ribbon cost per meter?

Answers

Answer:  £5.36

Step-by-step explanation: You can find this by dividing £64.32 by 12

A six-sided die is rolled. What are the odds that a number greater than 4 is rolled?

Answers

Answer: [tex]\frac{1}{3}[/tex] or about 33%

Step-by-step explanation:

       We will divide the wanted outcomes by the possible outcomes.        

[tex]\displaystyle \frac{\text{wanted outcomes}}{\text{possible outcomes}} =\frac{\text{Number of numbers greater than 4}}{\text{number of numbers 1 through 6}} =\frac{2}{6}=\frac{1}{3}\;\; \text{or about 33\%}[/tex]

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Answer: 1/3

Step-by-step explanation:

There are only 2 numbers greater than 4. 5 and 6.

2/6= 1/3 chance

In physics, a deceleration (the slowing down of an object in motion) is considered a negative acceleration (in other words, the opposite of speeding up). If you crash a small toy car into a wall, and the acceleration of the car is -3 m/s2, what would be the total acceleration you would have applied to the car, if you repeated the crash eleven times?

Answers

Using proportions, the total acceleration you would have applied to the car would be of -33 m/s².

What is a proportion?

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

For one crash, the acceleration is of -3 m/s². Hence, for 11 crashes, the total acceleration would be of:

a = -3 x 11 = -33 m/s².

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helpp quick pleaseee

Answers

answer should be y=2x+1

Franklin had 20 minutes to do a three-problem quiz. He spent 10 9/10 minutes on question A and 5 3/5 minutes on question B. How much time did he have left for question C?

Answers

Answer:

5

Step-by-step explanation:

10+5=15

20-15=5 . that is the solution

3 The ratio of hotdogs to hamburgers at the cookout 3:6. What is the difference between the number of hotdogs and hamburgers if there are 120 hamburgers? ​

Answers

The difference between the number of hotdogs and hamburgers is 60

How to determine the difference?

The ratio is given as:

Hotdog : Hamburger = 3 : 6

When the total hamburger is 120.

We have:

Hotdog : 120  =3 : 6

Multiply 3 : 6 by 20

Hotdog : 120  =3 * 20 : 6 * 20

Evaluate

Hotdog : 120  = 60 : 120

By comparison, we have

Hotdog = 60

So, the difference is

Difference = 120 - 60

Evaluate

Difference = 60

Hence, the difference is 60

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Evaluate the function rule for the given value. f(x) = 3x for x = –4

Answers

Answer:

f(x)=-12

Step-by-step explanation:

Since x=-4 substitute -4 into the equation

f(x)=3*-4

f(x)=-12

Hope this helped!

To factor the expression 3x2 – 9x, Caleb found the GCF as shown.

List the factors:
3x2 = 3 • x • x
9x = 3 • 3 • x
GCF = 3 • 3 • x • x = 9x2
What is Caleb’s error?

Answers

Answer:

Caleb’s error was :

instead of selecting the least exponent ,Caleb took the highest exponent.

Step-by-step explanation:

3x² = 3 • x • x

(in this factorization the exponent of 3 is 1 and the exponent of x is 2)

9x = 3 • 3 • x

(in this factorization the exponent of 3 is 2 and the exponent of x is 1)

• The common factors of 3x² and 9x are 3 and x

In order to determine the GCF ,we have to Compare the exponents of the  common factors then take the numbers which have the least exponent value.

• in the factorization of 3x² the exponent of 3 is 1

and in the factorization of 9x the exponent of 3 is 2

The least exponent is 1 Then we take it.

• in the factorization of 3x² the exponent of x is 2

and in the factorization of 9x the exponent of x is 1

The least exponent is 1 Then we take it.

Conclusion:

GCF(3x² , 9x) = 3¹ × x¹ = 3x

which of the following has the same unit rate as $5 for 2 pounds
a. $20 for 8lb
b. $16 for 6lb
c. $24 for 8lb
d. $12 for 4lb
make sure to show your work

Answers

[tex] \qquad \qquad \bf \huge\star \: \: \large{ \underline{Answer} } \huge \: \: \star[/tex]

[ a ] $ 20 for 8 lb

[tex]\textsf{ \underline{\underline{Steps to solve the problem} }:}[/tex]

[tex]❖ \: \sf \:unit \: \: rate = simplest \: \: ratio \: in \: which \: it\: exists[/tex]

[tex] \qquad◈ \: \: \sf \: \cfrac{5}{2} \: \: \$ \:per \: \: lb[/tex]

Now, check out the options -

[ a ]

[tex] \qquad◈ \: \: \sf \: \cfrac{20}{8} [/tex]

( on simplifying )

[tex] \qquad◈ \: \: \sf \: \cfrac{5}{2} \: \: \$ \:per \: \: lb[/tex]

Same as the given one.

[ b ]

[tex] \qquad◈ \: \: \sf \: \cfrac{16}{6} [/tex]

( on simplifying )

[tex] \qquad◈ \: \: \sf \: \cfrac{8}{3} \: \: \$ \:per \: \: lb[/tex]

Not the same.

[ c ]

[tex] \qquad◈ \: \: \sf \: \cfrac{24}{8} [/tex]

( on simplifying )

[tex] \qquad◈ \: \: \sf \: 3 \: \: \$ \:per \: \: lb[/tex]

Not the same.

[ d ]

[tex] \qquad◈ \: \: \sf \: \dfrac{12}{4} \: \: [/tex]

( on simplifying )

[tex] \qquad◈ \: \: \sf \: 3 \: \: \$ \:per \: \: lb[/tex]

Not the same.

[tex] \qquad \large \sf {Conclusion} : [/tex]

The Correct answer is [ a ] $ 20 for 8 lb

Answer is a. $20 for 8lb
Step by step
You can first find the ratio by dividing the cost by lb
$5/2 = $2.50 per lb
Now multiply the price per lb x the pounds offered in a, b, c, and d
a. 8lb x $2.50 = $20 that’s your answer
b. 6lb x $2.50 = 16 (wrong)
c. 8lb x $2.50 = $24 (wrong)
d. 4lb x $2.50 = $12 (wrong)

Select the correct answer from each drop-down menu.
Consider triangles ABC and QPRshown.
Triangle ABC is
triangles are
B
triangle QPR. Since the transformations
Reset
Next
, the

Answers

Triangle ABC and triangle QPR are similar triangle based on the side-angle-side similarity theorem.

What are similar triangles?

Two triangles are said to be similar if they have the same shape and the ratio of their corresponding sides are in the same proportion. Also, corresponding angles are congruent.

Triangle ABC and triangle QPR are similar triangle based on the side-angle-side similarity theorem.

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Answer:

down below

Step-by-step explanation:

Hope this helps =)

What is the probability of choosing a triangle?

Answers

Answer:

52.9%

Step-by-step explanation:

There are 17 shapes total. Nine of those shapes are triangles. Therefore the probability of choosing a triangle is 9/17.

To find that as a percentage type 9 divided by 17 into the calculator. The answer to that is 0.5294117647058824. To turn a decimal into a percentage move the decimal point two places over making the percentage: 52.94117647058824%.

Since the yellow text states to round the answer to the nearest hundredth of the percent the answer is 52.9%.

52.94%

Step-by-step explanation:

there are 17 objects and you divide the 9 triangles by 17 and get .529411765. Which is 52.94 percent.

can someone solve this for me pls¿​

Answers

the first one would be 3 x 3 x 3!

but the others i dont know!

——- answer founded ———

i remember this test, so 3 would be 3 x 3 x 3 because it has it on top w the ma so mark brainlist if correct!

You purchase a dishwasher for $1249.99 plus 4% sales tax.
The appliance store offers an installment loan that allows you to pay for
the dishwasher by making 12 equal monthly payments of $124.58. What
is the cost of credit, in dollars, for this loan? Round your answer to the
nearest cent.

Answers

$195

Total with tax
$1249.99x0.04 = $1299.98

Total for monthly payment for 12 months
$124.58 x 12 = $1494.96

Subtract both totals
$1494.96 - $1299.98 = $194.98

Another way…

Total with tax $1299.98 \ 12 = $108.33

Subtract given monthly payment
$124.58 - $108.33 = $16.25

Multiply $16.25 x 12 = $195



$194.97 is the cost of the credit loan.

What is percentage?

A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to compute a percentage of a number, we should divide it by its whole and then multiply it by 100. The proportion, therefore, refers to a component per hundred. Per 100 is what the term percent signifies. The letter "%" stands for it.

The total cost of the dishwasher with sales tax can be found by multiplying the price by 1.04:

$1249.99 × 1.04 = $1299.99

The cost of credit is the total amount paid through the installment loan minus the cost of the dishwasher:

12 × $124.58 = $1494.96

$1494.96 - $1299.99 = $194.97

Therefore, the cost of credit for this loan is $194.97.

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Jaime spent $7.61 at the concession stand. This is $3.50 more than 3 times the amount of
money that Erin spent. How much money did Erin spend?

Answers

Answer:

jsjsjd b ebejisnskskhdbd zkzkz z.

Place the following equation into quadratic form.

-7 = (x + 8)^

Answers

The representation of the equation as a standard quadratic equation is given by:

x² + 16x + 71 = 0.

What is the standard representation of a quadratic equation?

The standard representation of a quadratic equation is given by:

ax² + bx + c = 0.

In this problem, the equation is:

-7 = (x + 8)²

Then:

x² + 16x + 64 = -7.

x² + 16x + 71 = 0.

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A local ice cream store sells three flavors of ice cream during a busy summer month. During this month, there were 566 orders of vanilla ice cream, 400 orders of strawberry ice cream, and 1,224 orders of chocolate ice cream. What is the experimental probability that strawberry ice cream was ordered during this month?

answer options:
204/365
14/207
40/219
283/1095

Answers

Answer:
C. 40/219
Step - by - step explanation:
Vanilla = 566
Strawberry = 400
Chocolate = 1224
Total amount of ice cream = 566+400+1224
= 2190
Strawberry/total
= 400/2190
= 40/219


A 20 inch tall plant grows 4 inches per month. What would be the height of the plant after 10
months?
60 inches
40 inches
80 inches
100 inches

Answers

Answer:

60inches

Step-by-step explanation:

this because If you multiply 4 by 10 equals 40 add 40 to 20 equals 60

There are some frogs and some lily pads at a pond. If lily pads with frogs on them have two frogs each, then there are 3 lily pads with no frogs on it. If each lily pad has exactly one frog on it, then there are 3 frogs with no lily pad. How many frogs are at the pond

Answers

Frogs are at the pond = 12.

Given,

There are some frogs and some lily pads at a pond. If lily pads with frogs on them have two frogs each, then there are 3 lily pads with no frogs on them. If each lily pad has exactly one frog on it, then there are 3 frogs with no lily pad.

= 2( n-3) = n+3

= 2n -6 = n+3

=> n = 9

9 pads, 12 frogs.

Hence, Frogs are at the pond = 12.

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A table representing the function f(x) = 2(three-halves) Superscript x is shown below.

Answers

The truth of the given function that we have here is  The function increases at a constant multiplicative rate.

How to solve for the multiplicative rate of the constant

The table is given as

x            0   1    2      3

f(x)         2   3   4.5   6.75

We have x ranging from 0 to 3 while y ranges from 2 to 6.75.

The observations that we can make about the y values is that they produce the next value at the same rate of multiplication.

This is shown here

2 x 1.5 = 3

3 x 1.5 = 4.5

4.5 x 1.5 = 6.75

Hence we can conclude that it increases at a constant multiplicative rate of 1.5.

Complete question

A table representing the function f(x) = 2(three-halves) Superscript x is shown below. A 2-column table has 4 rows. The first column is labeled x with entries (0, 1, 2, 3). The second column is labeled f (x) with entries 2, 3, 4.5, 6.75. What is true of the given function? The function increases at a constant additive rate. The function increases at a constant multiplicative rate. The function has an initial value of 0. As each x value increases by 1, the y values increase by 1.

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The height of AXYZ is the
distance from point Y to XZ
Find the area of the
triangle. Round your answer
to the nearest tenth, if
necessary. y(4,5) a(2,1) x(0,2) z(4,0)
pls help quick:(

Answers

Answer:

areas of AXYZ=10 square units1

Answer:

10 units squared

Step-by-step explanation:

Area of a triangle = 1/2 × base × height

Use the distance between two points formula to find the measure of the height and base of ΔXYZ.

Distance between two points

[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

[tex]\textsf{where }(x_1,y_1) \textsf{ and }(x_2,y_2)\:\textsf{are the two points}[/tex]

Height of Triangle

Define the points:

[tex]\textsf{Let }(x_1,y_1)=(2,1)[/tex][tex]\textsf{Let }(x_2,y_2)=(4,5)[/tex]

Substitute the points into the distance formula to find the height of the triangle:

[tex]\begin{aligned}\implies \sf height & =\sqrt{(4-2)^2+(5-1)^2}\\& = \sqrt{2^2+4^2}\\& = \sqrt{20}\end{aligned}[/tex]

Base of Triangle

Define the points:

[tex]\textsf{Let }(x_1,y_1)=(0,2)[/tex][tex]\textsf{Let }(x_2,y_2)=(4,0)[/tex]

Substitute the points into the distance formula to find the height of the triangle:

[tex]\begin{aligned}\implies \sf base & =\sqrt{(4-0)^2+(0-2)^2}\\& = \sqrt{4^2+(-2)^2}\\& = \sqrt{20}\end{aligned}[/tex]

Area of Triangle

[tex]\begin{aligned}\implies \sf Area & = \dfrac{1}{2} \times \sf base \times height\\& = \dfrac{1}{2}\sqrt{20}\sqrt{20}\\& = \dfrac{1}{2}(20)\\& = 10 \sf \:\:units^2 \end{aligned}[/tex]

A rocket is launched at the top of a building. The height of the rocket (in meters) written
in terms of time (seconds) can be modeled by h (t) = -4.9t2 +9.8t + 73.5. What is
the maximum height?

Answers

The maximum height of the rocket is 78.4m

Maximum height of a function

Given the function that represents the height of a function expressed as:

h(t) = -4.9t² +9.8t + 73.5.

The rocket will reach its maximum height at the point where h'(t) = 0

h'(t) = -9.8t +9.8

Equate to zero

0 = -9.8t + 9.8

9.8t = 9.8

t = 1

Substitute

h(1) = -4.9(1)²+9.8(1) + 73.5

h(1) = 4.9 + 73.5

h(1) = 78.4m

Hence the maximum height of the rocket is 78.4m

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Graph the inequality. -3 < y - 7x < 15

Answers

The graph of the inequality can be seen in the image below.

How to graph the inequality?

Here we have:

-3 < y - 7x < 15

Isolating y, we get:

-3 + 7x < y < 15 + 7x

So we need to graph two linear inequalities:

y > -3 + 7x

y < 15 + 7x

So we need to graph two parallel lines (with dashed lines, the lines aren't solutions) and shade the region above the first line and below the second line.

The graph is below:

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someone please tell formula

Answers

Answer:

(i) Total cost of the flat is Rs. 540000.

(ii) Expenditure incurred on labour is Rs. 150000

Step-by-step explanation:

According to the question, cement cost is Rs. 112500, which represents 75° in the pie chart.

(i) The total cost of the flat is represented by the total 360° in the pie chart.

∴ Using unitary method

75° represents Rs. 112500

⇒ 360° represents = [tex]\frac{112500}{75}[/tex]  ×  360

                                = Rs. 540000

∴  Total cost of flat = Rs. 540000

(ii) Similarly, to calculate the cost of labour, represented by 100° in the pie chart, we can use the unitary method:

75° represents Rs. 112500

⇒ 100° represents =  [tex]\frac{112500}{75}[/tex]  ×  100

                               = Rs. 150000

∴ Cost of labour = Rs. 150000

If,0 < 3x - 2 < 1, what is one possible value for x?​

Answers

Answer:

one possible solution is 5/6

Step-by-step explanation:

Solving for x

0 < 3x - 2 < 1

Add 2 to each side

0+2 < 3x - 2+2 < 1+2

2 < 3x<3

Divide each side by 3

2/3 < 3x/3 < 3/3

2/3 < x < 1

X must be between 2/3 and 1

Getting a common denominator

4/6 < x < 6/6

So x can be 5/6

Fatima evaluated the expression StartFraction 4 m Superscript negative 3 Baseline n Superscript negative 2 Baseline Over m Superscript negative 1 Baseline n EndFraction, when m = negative 2 and n = 4. Her work is shown below.

StartFraction 4 m Superscript negative 3 Baseline n Superscript negative 2 Baseline Over m Superscript negative 1 Baseline n EndFraction = 4 m Superscript negative 2 Baseline n Superscript negative 3 Baseline = 4 (negative 2) Superscript negative 2 Baseline (4) Superscript negative 3 Baseline = StartFraction 1 Over 64 EndFraction times StartFraction 1 Over 64 EndFraction = StartFraction 1 Over 4,096 EndFraction

What was Fatima’s error?
She subtracted the exponents incorrectly when simplifying the expression.
She substituted the wrong values for the variables.
She applied the exponent Negative 2 to 4 (negative 2) instead of applying the exponent to just Negative 2.
She found an incorrect value for (Negative 8) Superscript negative 2 since the value should be negative.

Answers

The error of Fatima is: C. She applied the exponent -2 to "4(-2) instead of only to "(-2).

What is an Exponent?

An exponent in any expression is the letter or number on the right of a base in an expression.

In the evaluated expression shown, the base that the exponent "-2" applies to is "m", and does not include 4. If we substitute the value of m = -2, into the evaluated expression, the base that the exponent "-2" applies to is "-2" and does not include "4".

Therefore, Fatima's mistake is: C. She applied the exponent -2 to "4(-2) instead of only to "(-2).

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By the congruent supplements theorem, what can you conclude? anglecbg is-congruent-to angledbg anglefbc is-congruent-to angledbg anglecbg is supplementary to angledbf. anglefbc is supplementary to angledbg.

Answers

By the Congruent Supplements Theorem, we can conclude that,

∠FBC ≅ ∠DBG.

What is Congruent Supplements Theorem?

The Congruent Supplements Theorem states that two angles are said to be congruent if they are supplements of the same angle or even congruent angles.

If there are 4 lines such that, right angles are created when a horizontal line with the points F, B, and G crosses a vertical line with the points A, B, and E at point B. Between angles F and B and A and G, a third diagonal line with the points D, B, and C is intersecting the other two lines at point B. At points A, C, and G, there is a fourth line that joins three other lines.

Drawing Conclusion

In case the angle FBC and angle CBG are supplementary angles, angle DBG and angle DBF are another pair of supplementary angles, and angle CBG is-congruent-to angle DBF, we can apply congruent supplement theorem and draw the following inference,

∠FBC ≅ ∠DBG

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Answer: tis B :D

Step-by-step explanation:

The equivalent expression of 2a + 8 is ________.

Answers

Answer:

8+2a

Step-by-step explanation:

     Switching the order of the terms comes out as an equivalent expression.

Whatever A is, if we multiply it by 8 and add 2, it will be equivalent to the sum of the same number times multiplied by 8 and 2.

I hope that helps!

Answer:

2(a +4)

Step-by-step explanation:

Distributive property:  a*b + a * c = a*(b+c)

Factorize 2 & 8  and find GCF of 2 & 8

2 = 2

8 = 2* 2*2

GCF = 2

2a + 8 =  2a + 2*4

           = 2(a + 4)

In the diagram below, if AB = 25, AC = 15, and BD = 5, then find the length of DC.
B
Select one:
a. 15
b. 5
c. 25
d. 3
D
PC

Answers

The length of DC based on the information given about the triangle is 19.37.

How to calculate the length?

Based on the given information, it should be noted that:

AB² = AD² + BD²

25² = AD² + 5²

625 = AD² + 25

AD² = 625 - 25

AD² = 600

AD = √600

AD = 24.5

DC² = AD² + - AB² (Pythagoras theorem)

DC² = 24.5² + 15²

DC² = 375.25

DC = 19.37

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Find an equation for the line that passes through the points (4, -3) and (-2, 5)

Answers

Step-by-step explanation:

* start by finding the gradient/ slope of the line using the two points*

after finding the gradient you can now use the formula/ equation of any straight line which is *y = m×x + c*

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