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2 years ago

Solve 9x + 7 = 43 for x

2 answers:

7 0

9x+7 = 43

1st step you need to get 9x by itself, to do this subtract 7 from both sides

9x +7 - 7 = 43 - 7

now you have 9x = 36

to solve for x divide both sides by 9

9x /9 = 36/9

x = 4

garri49 [273]2 years ago

3 0

The answer would be 4. 9x4=36 and then 36+7= 43.

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Which value of a would make the following statement true -4(2x - a) = -8x + 16?

pashok25 [27]

The answer would be B. -4

5 0

2 years ago

Alejandro loves to go to the movies. He goes both at night and during the day. The cost of a matinee is 7 dollars. The cost of a

saw5 [17]

Answer:

Alejandro went to 8 matinee shows and 4 evening shows.

Our system of equations:

x + y = 12

7x + 12y = 104

Correct statement and question:

Alejandro loves to go to the movies. He goes both at night and during the day. The cost of a matinee is 7 dollars. The cost of an evening show is 12 dollars.

Alejandro went to see a total of 12 movies and spent $ 104. How many of each type of movie did he attend? Write a system of equations.

Source:

Previous question that can be found at brainly

Step-by-step explanation:

Step 1:

Let x to represent the number of matinee shows Alejandro went to.

Let y to represent the number of evening shows Alejandro went to.

Now, let's write our system of equations:

x + y = 12

7x + 12y = 104

*********************

x = 12 - y

*********************

7 (12 - y) + 12y = 104

84 - 7y + 12y = 104

5y = 104 - 84

5y = 20

y = 20/5

y = 4 ⇒ x = 12 - 4 = 8

Alejandro went to 8 matinee shows and 4 evening shows.

4 0

2 years ago

A rectangle has a perimeter of 46 inches.The width of the rectangle is 7 inches.What is the length of the rectangle,in inches

FinnZ [79.3K]

Answer:

74 inches

Step-by-step explanation:

8 0

2 years ago

Please help me ill mark you brainliest and please show your work :)

Nana76 [90]

Answer:

Step-by-step explanation:

Multiply both sides of the equation by 8/5.

4x-16=32

Move 16 to the other side

4x=32+16

add numbers on the right side

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2 years ago

If sin ⁡x=7/25, and 0 < x < π/2, what is cos⁡(x−3π/2)?

Likurg_2 [28]

Answer:

$Cos(x-\frac{3\pi}{2})=-\frac{7}{25}$

Step-by-step explanation:

Remember that $cos(x-y)=cos(x)cos(y)+sin(x)sin(y)$

Then,

$cos(x-\frac{3\pi}{2})=cos(x)cos(\frac{3\pi}{2})+sin(x)sin(\frac{3\pi}{2})\\$

But $cos(\frac{3\pi}{2})=0$ and $sin(x)=\frac{7}{25}$

Then

$cos(x-\frac{3\pi}{2})=cos(x)*0+\frac{7}{25}*sin(\frac{3\pi}{2})\\=\frac{7}{25}*(-1)=\frac{-7}{25}$

5 0

2 years ago