Mathematics High School

Please help!
For the following system,

3x + y = 8
−x − 2y = −10

if you isolated x in the second equation to use the substitution method, what expression would you substitute into the first equation?
−2y + 10
2y + 10
2y − 10
−2y − 10

Answers

Answer 1

Answer:

-2y+10

Step-by-step explanation:

-x - 2y = -10

add 2y to both sides

-x = -10 + 2y OR 2y - 10

divide both sides by -1

x = -2y+10

Related Questions

Complete the steps to solve for x.
-0.51x + 0.21x = 6.3
- 0.51x + 0.21x = 6.3
x = 6.3

Answers

Answer:

Step-by-step explanation:

-0.51x+0.21x=6.3  combine like terms

-0.3x=6.3  divide by -0.3

x= -21

SHOW WORK PLZZZZZZZZZZZZZ!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

(x+1)(x+5)(5x−1)

x= 1/5, -5, -1

Step-by-step explanation:

5x^3+29x^2+19x-5

factor

(x+1)(x+5)(5x−1)

the zeros are

x+1=0

x=-1

x+5=0

x=-5

5x-1=0

5x=1

x=1/5

maybe this helps

what is the answer it is hard and dumb

Answers

D since the line is going to the right.

d

good luck  

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A garden has the dimensions of 5x4 in feet. The gardener wants to expand her garden to 56 square feet. She wants to add the same distance (x) to each side. What is the value of x. Must show work for credit. *

Answers

Answer:

2 feet

Step-by-step explanation:

If we were to add the same amount to each dimension then the ratio would be the same, meaning that the length will always be one more than the width. Therefore, the two consecutive numbers that when multiplied equal 56 are 6 and 7.

7 * 6 = 56 square feet

This means that we would be adding 2 feet to each side.

How many solutions does the following function have? f(x)=4x^2-100

Answers

Answer: x = 5, -5

Step-by-step explanation:

Solve using the quadratic formula.

92 if I’m wrong I’m sorry

There is a sale at your favorite clothing store. They have their jeans priced at $49.99 with a extra 20% off. How much will you pay for three pairs of jeans, not including tax? Exlpain how you got your answer.

Answers

Answer: You need to pay $119.98 for three pairs of jeans.

Step-by-step explanation:

Market price of 1 jeans = $49.99

Discount percent = 20% = 0.20

Market price for 3 jeans = 3 x ($49.99)

= $ 149.97

Discount price = 20% of (Market price for 3 jeans )

= .0.20 x ($149.97)

= $ 29.99

Price of 3 jeans after discount = (Market price for 3 jeans ) - ( Discount price)

= $ (149.97 - 29.99)

= $  119.98

Hence, you need to pay $119.98 for three pairs of jeans.

Kimoni wants to purchase a pair of shoes that are on sale for 10% off the regular price
of $64.00. Which is the sale price of the shoes?

Answers

Answer:

57.60

Step-by-step explanation:

Multiply $64 by .1 which is the decimal form of 10%. You should get 6.4. Then you subtract 6.4 from 64, you get 57.60.

Can someone help me with both these answers I’m marking brainliest

Answers

Answer:

X = 12/60%

60% = 0.6

X = 12/0.6

X = 20.

For the second one, multiply 350 by 0.02, which is just 2% in decimal form.

350*0.02 =7

That's 7 eggs.

Hope this helps!

HELPPPPPPPPPPPPPPPP!

Answers

Step-by-step explanation:

The answer is over stretching the ligament

Answer:

Sprain: over-streching the ligament

Tear: Torn or separated from bone

Dislocation: Bones separated from joint

Arthritis: Overuse injury that occurs over time

Given: SIn(A)= 4/5 ,pi/2 < A< pi and sin(B)= -2square5/5, pi < B < 3pi/2

What is the value of cos(A-B)

A. -2square5/25
B. -square5/5
C. 2square5/5
D. 11square5/25

Answers

I think is The letter A

What is the slope and y-intercept of the equation 6x + 2y = 14
I

Answers

slope: -3
y-intercept: (0,7)

I need help with this​

Answers

Answer: 0.6 grams

Step-by-step explanation: divide grams by cm and its 0.6

The ratio of boys to girls in Mr. Woods class is 5:7.

If there are 60 students in all, how many are boys?

Answers

Answer:

25

Step-by-step explanation:

5+7 is 12, 60 divided by 12 is 5.   5x5 is 25

It’s would be approximately 25 hope that helped :)

i cant find my answer. You should really give your people the answer they are looking fo instead of giving sujestions.

Answers

Answer:

Did you ask a question? I just checked your profile to see if you posted any but i dont see anything except this

Step-by-step explanation:

Answer:

there is no question asked

Step-by-step explanation:

how do you find the slope, I really need help.

Answers

Answer:

-1/10

Step-by-step explanation:

its down 1 and right 10 so you know the slope is -1/10

(can I get brainliest please)

The answer is b. The rise is 1 and the run is 10

Of the 150 students that attended the science camp, 82 were sixth graders. Marco says that less than half of the campers were sixth graders. Is he correct? Tell why or why not. Use a benchmark percent to support your answer.

Answers

Answer:

Incorrect

Step-by-step explanation:

150 students are 100%,

82 students are x%

(82*100)/150=54,67%, so  that is more than half of all students

Answer:

Marco is NOT correct

Step-by-step explanation:

150 / 2 = 75

so more than half of the students were 6th graders

55% of students were 6th graders, that's my benchmark but I'm not really sure.

Twice a number k plus 8 equals one-half times the quantity of four times a number k plus fourteen ?

Answers

Answer:

No solutions

Step-by-step explanation:

So putting that into an equation it equals

2k+8=(4k+14)÷2

Move the 2 to the other side.

2∙2k+8=4k+14

Simplify.

4k+8=4k+14

It doesn't make sense so No Solutions

P(-6, 4), O-2, 7), R(-1, 0), S(-5, -3)
Please help ASAP

Answers

Iucenuvnuejiwnuwh fvewfvewinhufewv

guys plz help ASAP its timed and i dont know what im doing wrong will mark brailiest 18 points

Answers

Answer:

28.26 is the awnser

Step-by-step explanation:

Tell me if i got it right

THAnks

At the end of the year, Close made the current year on mark down to make Room for next year models. One particular model had a sticker price of $28,640 when it was new. After being marked down, the price is now $27,208. What What is the percent of decrease in the price of the car

Answers

Answer: 5%.

Step-by-step explanation:

Given data:

Old price = $28,640

New price = $27,208

Solution:

Percentage of decrease

= old price - new price / old price * 100

= $28,640 - $27,208 /. $28,640 * 100

= $1432/$28,640*100

= 0.05*100

= 5%.

The percentage of decrease for the car is 5%.

Janna is looking for an apartment. She plans on paying no more than 25% of her monthly income in rent. If she earns $1,825 a month, which amount represents the most she plans to pay in rent every month?​

Answers

Answer:

456.25

Step-by-step explanation:

25% as a decimal is .25

To find 25% of her monthly income, multiply 1,825 by .25

1825*.25=$456.25

Nadia is a stockbroker. She earns 13​% commission each week. Last​ week, she sold ​$4,500 worth of stocks. How much did she make last week in​ commission? If she averages that same amount each​ week, how much did she make in commission in​ 2011?

Answers

Multiply amount sold by commission rate:

4500 x 0.13 = 585

She made $585 last week.

Multiply amount made in 1 week by 52 weeks ( 1 year = 52 weeks)

585 x 52 = 30,420

She made $30,420 in 2011

Find the measure of the each angle indicated. HELP

Answers

Answer:

(n-2)180 (this is the equation to find the sum of interior angles)

(4-2) 180 (plug in the amount of angles in the polygon and then solve)

2* 180

360

360 - 115 -100- 73= 72 (360 is the sum of all angles for this polygon. so subtract the known angles to find the unknown one)

measure of angle B is 72 degrees

Step-by-step explanation:

Answer:

b=72 degrees

Step-by-step explanation:

100+115+73=288

360-288= 72 degrees

Please help me and i will give you brainlest prettyplease

Answers

Answer:

Ainsworth (1970) identified three main attachment styles, secure (type B), insecure avoidant (type A) and insecure ambivalent/resistant (type C).

Step-by-step explanation:

For example, Schaffer and Emerson suggested that attachments develop in four stages: asocial stage or pre-attachment (first few weeks), indiscriminate attachment (approximately 6 weeks to 7 months), specific attachment or discriminate attachment (approximately 7-9 months) and multiple attachment (approximately 10

Order from least to greatest
6.8
The square root of 54/3
The square root of 13
26/3
PLEASE HELP

Answers

Your answer will be :

the square root of 14, the square root of 54/3, 6.8, the square root of 26/3.

all quadrilaterals are polygons true or false

Answers

Answer:

True

Step-by-step explanation: because they have 4 sides

All quadrilaterals are polygons because they are 2-dimensional closed shapes made up of interconnected straight lines, with four sides and angles.

Hence the given statement is true.

Sincw we know that,

A polygon is defined as a 2-dimensional closed shape made up of straight lines that are interconnected with each other at their endpoints. A Quadrilateral is a polyhedron that consists of four straight sides or edges.

The term quadrilateral is derived from two Latin words "quadri" meaning four and "latus" meaning sides.

It is important to note that not all polygons are quadrilaterals, but all quadrilaterals are indeed polygons.

Some examples of quadrilaterals include squares, rectangles, parallelograms, trapezoids, and rhombuses.

These shapes share certain properties such as having four sides and angles, with the sum of their interior angles adding up to 360 degrees.

To learn more about polygons visit:

https://brainly.com/question/23846997

#SPJ7

jnsxdhcdhcfhbh demdencec ecerfgv yes

Answers

Step-by-step explanation:

gvxghhujhggfffffddnnkiouucdss

1+1 = ravioli ravioli give me the formuloli

What expressions are equivalent to 6.7 - (-2.5)

Answers

Answer:

[tex]6.7-\left(-2.5\right)=9.2[/tex]

Step-by-step explanation:

Given the expression

[tex]6.7-\left(-2.5\right)[/tex]

Solving the expression to get the equivalent function

[tex]6.7-\left(-2.5\right)[/tex]

[tex]\mathrm{Apply\:rule}\:-\left(-a\right)=a[/tex]

[tex]=6.7+2.5[/tex]

[tex]\mathrm{Add\:the\:numbers:}\:6.7+2.5=9.2[/tex]

[tex]=9.2[/tex]

Thus,

[tex]6.7-\left(-2.5\right)=9.2[/tex]

The difference of two numbers is 3. Their sum is 13. Find the numbers.

Answers

Answer:

Answer:

The two numbers are 8 and 5

Explanation:

8 - 5 = 3

8 + 5 = 13

Hope this helps!

please answer please answer thank you

Answers

Answer:

367.62 in³

Step-by-step explanation:

The volume of a sphere is V = (4/3)πr³.  

Here, that volume of the whole sphere is V = (4/3)(3.14)(5.6 in)³, or

V = 735.25 in³

A 'hemisphere' is half a sphere.  Thus, the volume of each hemisphere shown here is

735.25 in³

---------------- = 367.62 in³     This just about matches the first answer choice.

        2

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