All categories

4 years ago

Please Help!!!!!!! Emergency

Mathematics

1 answer:

Stolb23 [73]4 years ago

6 0

Answer:

15 + x

Step by step explanation

For Company X, the initial cost is 30 cents plus 5 cents per minute, so the expression would be 30 + 5x (x would represent minutes.

For Company Y, the initial cost is 15 cents plus 4 cents per minute, so the expression would be 15 + 4x (x would represent minutes.)

Then subtract the expression of Y from the expression of X to show the difference in value between Y and X.

So, 30 + 5x - (15 +4x)

Distribute the subtraction sign.

30 + 5x - 15 - 4x

Solve across.

15 + x

You might be interested in

Hehehe someone please help me

Alinara [238K]

Answer:

Step-by-step explanation:

5 0

4 years ago

Read 2 more answers

Which relation is a function?

krek1111 [17]

Answer:

the top left is a function

5 0

3 years ago

How do you write the equation of a circle if you know it's radius and the coordinates of its center

ANTONII [103]

So you must talking about the circumference I guess.

3.14( pi) * diameter.

5 0

3 years ago

The function h(t)=−16t(t−7) models the height of an object at any time t after it is launched, where t is measured in seconds. A

Kipish [7]

Answer:

2.65secs

Step-by-step explanation:

Give:

The function h(t)=−16t(t−7) models

the object will hit the ground at h= 0

h(t)=−16t(t−7)

0= -16t(t−7)

0= -16t^2 + 112

16t^2 = 112

t^2 = 7

t= √7

t=2.65secs

Hence, the object object hit the ground at 2.65secs

7 0

3 years ago

A rectangle with an area of 24 square units has length x+1 and width 4x-6. find the value of x.

dimulka [17.4K]

$area = length \cdot width \\ \\A = 24 s^2 \\ \\ l=x+1 , \ \ w=4x-6 \\ \\ A=lw\\ \\24 =(x+1)(4x-6)$

$24 =4x^2-6x+4x-6 \\ \\4x^2-6x+4x-6 -24=0\\ \\4x^2-2x-30=0 \ \ / :2\\ \\2x^2-x-15=0 \\ \\a=2, \ b=-1 , c= -15$

$\Delta =b^2-4ac = (-1)^2 -4\cdot2\cdot (-15) = 1+120=121\\ \\x_{1}=\frac{-b-\sqrt{\Delta} }{2a}=\frac{1-\sqrt{121}}{2*2 }=\frac{ 1-11}{4}=\frac{-10}{4}=- \frac{5}{2} \\ \\x_{2}=\frac{-b+\sqrt{\Delta} }{2a}=\frac{1+\sqrt{121}}{2*2 }=\frac{ 1+11}{4}=\frac{12}{4}=3 \\ \\Use \ positive \ value \ of \ x : \\ \\ x =3$

5 0

4 years ago