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Nostrana [21]
3 years ago
7

A calculator costs $d. A school buys 90 calculators, and gets a $100 discount for bulk purchasing. How much did the school spend

?​
Mathematics
1 answer:
erik [133]3 years ago
4 0

Answer:

90d-100

Step-by-step explanation:

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Find an equation of the line through (3,6) and parallel to y = 4x - 7.
FromTheMoon [43]

Answer:

y=4x-6

Step-by-step explanation:

Okay, to do this we must understand what parallel means.

parallel means that that one line will NEVER touch the other. In order for this to happen they must be increasing (or decreasing) by the SAME rate. I.e the slope of your line must be the same as the lin in question thus our equation looks like,

y=4x+c.

Now lets find c.

To do this, plug the point (3,6) into the equation

6=4(3)+C

6=12+C

-6=C

Thus now that we know C, our equaiton is

y=4x-6

4 0
2 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=2x%20-%206%20%3D%205y%20-%203x" id="TexFormula1" title="2x - 6 = 5y - 3x" alt="2x - 6 = 5y - 3
Zigmanuir [339]

Answer:

( 2x - 3 ) / 5

Step-by-step explanation:

2x - 6 = 5y - 3

2x - 6 + 3 = 5y

2x - 3 = 5y

y = ( 2x - 3 ) / 5

6 0
2 years ago
What is the lateral surface area of a cube with side length of 9 cm
Wittaler [7]
S^2 = one face of a cube
S^2 × 6 = entire Surface Area (SA) of cube
One face = 9^2 = 81 cm^2
SA = 81 × 6 = 486 cm^2
3 0
3 years ago
0.13391963118/17(3.78)
erma4kov [3.2K]

Answer:

Simplify the expression.

0.02977742

Step-by-step explanation:

i think i hope its right

7 0
2 years ago
What is the value of x in the equation 3/2(4x – 1) – 3x = 5/4 – (x + 2)?
Olegator [25]

i have attached a file you can see it from there.

5 0
3 years ago
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