A formula can be rewritten to isolate a different ______

Solve each equation. 1. 25 - 3x = 40 2. } (x – 10) = -4

nordsb [41]

Step-by-step explanation:

For no 1

25 - 3x = 40 

- 3x = 40 - 25 

- 3x = 15 

 - x = 15 / 3

Therefore x = - 5 

Now for no. 2

1/3 ( x - 10) = - 4 

( x - 10 ) = - 12 

x = - 12 + 10

Therefore x = - 2 

Hope it will help :)

6 0

3 years ago

Read 2 more answers

Write the 2 digit number that matches the clue

Wittaler [7]

You can figure this out by setting up an equation and make

x= tens digit
y= ones digit

y + 8 =x (tens digit 8 more than ones)

also we know that

y>0
x>0

since the 10s digit and 1s digit cannot be more than one number, we can say

0 < y > 10
0 < x > 10

since x has to be greater than 0 but less than 10, there is only one number that would fit into the equation for y

2 + 8 = 10
(y cannot equal 2 because than x is equal to 10 and it must be less than)

1 + 8 = 9
( y can be 1 since x is less than 10)

so it would be
y= 1
x= 9

the number would be 91

hope this helped!

5 0

3 years ago

Pleeeeeeeaaaaassssseeeee heeeeeellllllpppppp

loris [4]

I got (-6.28, -0.76).

Step 1.) Write out the problems
-2x=8-6y
-15x=21-6y

Step 2.) Pick a problem and solve for X
-2x=8-6y = x=-4-3y

Step 3.) Plug in the x
(-15)(-4-3y)= 21-6y
60 + 45y= 21-6y

Step 4.) Solve for y
y=-0.76

Step 5.) Plug in the y value into one of the equations
-2x= 8- 6(-0.76)
-2x= 8 + 4.56
x= -6.28

Step 6.) Check your answers
-2(-6.28)=8-6(-0.76)
12.56=12.56

Step 7.) Write it out
(-6.28,-0.76)

7 0

3 years ago

(20 pts!) if the base of the roof has length 40 feet and x=30, which of the following gives the height of the roof?

musickatia [10]

Answer:

23.094 ft approximately

(If you want your answer in a different format, let me know please.)

Step-by-step explanation:

I would have solve this using tangent since the side opposite to x is asked for and the adjacent side to side is given as having a measurement of 40 ft.

But I think they want you to use the formula:

$l=\frac{b}{\cos(x)}$ .