ok so we need to find the unit rate( how many customers per minute) and thats 12 divided by 9 which is 1.3 minutes per customer so now we need to find what 1.3 minutes is x4 customers. This brings us to 5.2.

6 0

2 years ago

Find the value of x

devlian [24]

X=20
180=7x+x+20
-20. -20
180=7x+x
180=8x
divide by 8
x=20

5 0

3 years ago

Can someone please help me on this??

Usimov [2.4K]

Answer:

Step-by-step explanation:

To solve this use the equation $x^2 -15x - 50 = y$ given in the problem and the value y = 50. Substitute y = 50 then solve for x by factoring.

$x^2 -15x - 50 = 50\\x^2 - 15x -100 = 0$

Find two numbers which multiply to -100 and also add to -15. The numbers are -20 and 5.

So the factored form is (x-20)(x+5) = 0.

Set each factor equal to 0 and solve.

(x-20) = 0 so x = 20.

(x+5)=0 so x = -5.

This means the temperature is 20 degrees C or -5 degrees C. Only 20 is an option. The solutions is C.

3 0

2 years ago