Mathematics High School

Which equation is true when the value of x is -12

Answers

Answer 1

Answer:

Which equation is true when the value of x is -12 HERE YOU GO!!

Step-by-step explanation:

tricky ... let's see ...

I notice that if we subtract xy from both sides we get

7x + xy - xy = xy - xy + 21

then

7x = 21

and

x = 21/7 = 3

so there is only one value of x that satisfies the equation

x = 3

Going back to the original equation we see that any value of y will satisfy the original equation

we can see this by rearranging things:

7x + xy - xy = 21

here, I have performed the subtraction of xy on the right side as above, but have left the left side undone

(so we don't lose the presence of y)

Note that the above can also be written as

7x + (x - x)y = 21

7x + 0y =21

now, since anything times zero equals zero,

y may be any number.

Let's summarize:

1) x = 3

2) y = anything

looking back at the original question;

1) the equation is true for all ordered pairs

FALSE (only one x works, not all x)

2) there are no x and y pairs for which the equation is true.

FALSE (x=3, y=anything) makes it true, i.e. (3,1)

3) For each value of x, there is one and only one value of y that makes the equation true,

FALSE for each value of x, for the one value of x, x=3, y can be any number, which is an infinite number, not one

4) for each value of y, there is one and only on value of x that makes the equation true.

TRUE!! for all the infinite values of y you may pick, there is one and only one x you may pick, x = 3

ANSWER: STATEMENT 4 is CORRECT (TRUE)

Related Questions

A transversal crosses a pair of parallel lines to create a pair of same-side interior angles with the measurements of x° and (x−52)°. What is the value of x?

Answers

Answer:

x=116°

Step-by-step explanation:

If a transversal crosses a pair of parallel lines to create a pair of same-side interior angles with the measurements of x° and (x−52)°, then the sum of those angles is equal to 180°.

ATQ,

x°+(x-52)°=180°

2x=180°+52

⇒2x=232

⇒x=116°

So, the value of x is 116°

2=-6n+4m

how do you solve this ?

Answers

Answer:

n =3 and m = 5

Step-by-step explanation:

negative × positive = negative

So -6 × 3 = -18

4 × 5 = 20

negative + positive = positive

So -18 + 20 = 2

N=3 and i think 5 is for m i might be wrong

Select all of the situations below that can be modeled by the expression 4 + 3x.
Four more than three and a number.
Four more than three times a number.
The sum of three times a number and four.
The sum of the product of four three, and a number.
The sum of four and the product of three and a number.

Answers

Answer:it’s b

Step-by-step explanation:

I just did it on ede

can someone please help me with this question

Answers

Answer: 140 ft^2

Step-by-step explanation:

Triangle:

A = 1/2bh

A = 1/2(6 • 4)

A = 1/2(24)

A = 12

Square:

A = bh

A = 16 • 8

A = 128

Add them

128 + 12 = 140 ft^2

Answer:

7.21 ft

Step-by-step explanation:I don't know if i did it right but this is what I got.

After my salary was increased by 12%, it was $62,720. What was my salary before the increase?
I'll mark brainliest!

Answers

Answer

56,000

Step-by-step explanation:

1. A hexagon is inscribed in a circle. If the difference between the area of the circle and the area
of the hexagon is 24 m”, use the formula for the area of a sector to approximate the radius
of the circle. Give an exact answer( doesn't have to be rationalized) and round to 2 decimals.

Answers

Answer:

The radius, r ≈ 6.55 m

Step-by-step explanation:

The given parameters are;

An inscribed hexagon in a circle

The area of the hexagon = Area of the circle - 24 m²

The formula for the area of the circle = π·r² = π × r²

The area of each of the six equilateral triangle in the hexagon = √3/4 × r²

Where;

r = The radius of the circle

The area of a sector of a circle in which the equilateral triangle is inscribed = 60/360×π·r² = 1/6×π·r² = 1/6 × Area of the circle

Given that the sector of the circle in which one of the six equilateral triangles of the hexagon is inscribed is 1/6 the area of the circle, the difference in area between the equilateral triangle and the sector = 24/6 = 4

Therefore, the difference in the area between the sector of the circle and the area of the equilateral triangle = 4 m²

We then write; 1/6×π·r²- √3/4 × r² = 4

r²·(1/6×π- √3/4) = 4

r² = 4/(1/6 ×π - √3/4) = 48/(2·π -3·√3)

r = √(48/(2·π -3·√3) = 6.55 m to 2 decimal places

The radius, r ≈ 6.55 m.

x/20=2/8
x=__
pls explain the steps

Answers

Answer:

Today: Thursday, 15 October 2020

Hour: 04.09 WIB (in Indonesian)

____________________________

x/20 = 2/8

20 × 2 = 8 × x

40 = 8x

x = 40/8

x = 5

Plzz answer fast I know what it is but I need to double check!!!!!

Answers

Answer:

it's B

Step-by-step explanation:

just solve them and they match

Answer:

If your thinking B is the answer then you are right

PLEASE HELP ME
- The value of y varies directly with x. If x= 4,
then y= 32. What is the value of x when y= 176?

Answers

Answer: Wouldn't that make it x=44

Step-by-step explanation:

I just divided 176 by 4 because it said the value of y varies directly with x. So just used the rule they used i guess.

Y=mx+b
Solve for b
Solve for m
Solve for x

Answers

Subtract b from each side to get
y−b=mx
Next, divide each side by x to get y−b/ x= m
.

Answer:Let's solve for b.

Y=Mx+b

Step 1: Flip the equation.

Mx+b=y

Step 2: Add -mx to both sides.

B=-mx +y

lol I can’t be bothered to solve for m so here’s the answer

solve for M vv

M= -b+y / x -b+y are the numerators and x is the denominator

Solve for x

Can’t be bothered to show work so here you go

X=-b+y/m M is the denominator and -b+y are the numerators

yea you can Thank me later

what is 1111 * 1111?
it is my favorite math problem and 1111 is satisfying to say in chinese

Answers

Answer:

1,234,321

Step-by-step explanation:

1111 × 1111 = 1,234,321

I hope this helps!

4. Which of the following could be the areas of the three squares shown?

Answers

Answer:

Option (A)

Step-by-step explanation:

Three squares shown in the figure are formed on the sides of the given right triangle.

By Pythagoras theorem,

(Hypotenuse)² = (Leg 1)² + (Leg 2)²

Area of the square on the hypotenuse = Area of the square on the leg 1 + Area of the square on leg 2

Option (A).

95 = 40 + 55

True.

Option (B).

45 ≠ 35 + 25

False.

Option (C).

100 ≠ 10 + 10

False.

Option (D).

1200 ≠ 40 + 30

False

Therefore, Option (A) shows the areas of three squares.

PLease please please help quick

Answers

Answer:

Step-by-step explanation:

Same as last. multiple 8 into the entire equation.

Answer:

-80x+28y-56

4(-20x+7y-14)

Step-by-step explanation:

A horse has a speed of 10 miles per hour. The horse has traveled 15 milles. How many miles in total if it rides for another hour?

Answers

Answer:

d = 24.

Step-by-step explanation:

3. Simplify the polynomial.
Answers must be in standard
form.
-2(4x2 + 5x) + x(x2 + 6x)

Answers

Answer:

Step-by-step explanation:

Is this function linear? Why or why not? PLEASE LOOK AT THE PHOTO!! I really need it right now:)

Answers

Answer:

yes

Step-by-step explanation:

yes

yes, no x values or y values repeat

Solve each equation.Check your solution

Answers

s=2 because i did the math

Harry put blue and green marbles in a bag. Exactly 3/4 of the marbles in the bag are blue. Which of the following could be the total number of marbles in the bag.
A. 3
B. 6
C. 7
D. 8

Answers

Answer:

Step-by-step explanation:

Because when u multiply 3/4 times A,B,C it gives you a decimal, when u multiply 3/4 by 8 you get 6 a whole number.

The total number of marbles in the bag could be (d) 8

How to determine the possible total?

We have:

Blue proportion = 3/4

This means that the green proportion is

Green proportion = 1 - 3/4

Evaluate

Green proportion = 1/4

Express as ratio

Blue: Green = 3/4 : 1/4

Simplify

Blue: Green = 3 : 1

Add the ratios

Total = 3 + 1

Total = 4

The above means that the total number of marbles in the bag is a multiple of 4

i.e. 4, 8, 12, 16, 20......

Hence, the total number of marbles in the bag could be (d) 8

Answers

Answer:

Audrey needs to collect 3 more coins.

Step-by-step explanation:

Since she already scored 53 points, we have to find out how many more points she needs to score 97.

So, 97-53=45 points.

The problem says that each coin Audrey collects is worth 22 points. Therefore, 45 divided by 22= 2 remainder 1. However, if she only collects two more coins, Audrey will only have 96 points in total, not 97.

So, add another coin to make 3.

Please help! :(
Its a line and transversal, i'm just super confused. :(

Answers

Answer:

M=112

N=180-112=68

V=E

E=180-88=92

R=G

G=88(opposite angle)

what is the area of a rectangle that is 3/4 ft wide and 1/12 ft long?

Answers

Answer:

3/8

Step-by-step explanation:

because to find the area you multiply both numbers so 1*3 is 3 and 2*4 is 8 so your answer should be 3/8

2. 1. Are the following lines parallel? Explain using slopes. ty (0, 3) (-6, 1) 1 (4, 1) 2 4 6 0 2 62 (0, -2)

Answers

Answer:

confused

Step-by-step explanation:

summary of scientific notation

Answers

Answer:

Scientific Notation is making a huge number smaller, using exponents. A number like 800000 can be shortened with Scientific Notation. Example:

8 × [tex]10^{5}[/tex]

Step-by-step explanation:

Answer plsssssssssssssss

Answers

Answer:

x^2

Step-by-step explanation:

This equation is basically x^(4-2), based on the properties of dividing exponents. so, if you simplify, you get x^2

Which of the following situations can be modeled by the expression -8 + 35?

While Shawn was sleeping, the temperature decreased by 8°F. If the temperature was 35°F when Shawn went to bed, what was the temperature when Shawn woke up?

When Shawn woke up, the temperature was -8°F. By noon, the temperature had increased by 35°F. What was the temperature at noon?

None of the above.

When Shawn woke up, the temperature was -8°F. By noon, the temperature had increased to 35°F. By how much did the temperature change?

Answers

Answer:

The second one

write the question of a line perpendicular to y=2x-5 that passes through point (2,-5)

Answers

Answer:

Can you guys please help me?

Step-by-step explanation:

You guys seem to be older so may you please help?

I am young and in 7th grade so my problems shouldn't be that hard.

Evaluate the function for f(-9 if (x) = 3/5 x + 8

A. 67/5
B. -67/5
C. -13/5
D. 13/5

Answers

Answer:

Step-by-step explanation:

f(-9) = 3/5(-9) + 8 = 13/5

What is the image point of (9,4) after a translation left 5 units and up 1 unit?

Answers

Answer:

(4,5)

Step-by-step explanation:

what is 5x10^-7 as a decimal

Answers

AnsweStep-by-step explanation:

A company that manufactures dishwashers is testing their latest product to see how long it takes to cool down once a cycle is complete. The function, f(x) = 360 - 15x, represents the cooling cycle, where x is equal to the number of minutes and f(x) is equal to the temperature of the dishwasher after x minutes.

Answers

Step-by-step explanation:

Given that the function for the temperature of the dishwasher is

f(x) = 360 - 15x

We are told that x represents the number of minutes it takes to cool down.

with a given/known value of x we can predict the temperature of the dishwasher.

Say x=12 minutes, we can tell what the temperature will be after 12 minutes

by plugin in the value of x=12 in the expressions for the temperature

f(x) = 360 - 15(12)

f(x) = 360 - 180

f(x) = 180

The temperature after 12 minutes will be 180°

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