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3 years ago

Choose the expression that is equivalent to 12p2-2/5(5p2-10)+3p

Mathematics

1 answer:

Margarita [4]3 years ago

8 0

Answer:

$10p^2+3p+4$

Step-by-step explanation:

$12p^2-\frac{2}{5} (5p^2-10)+3p\\12p^2-0.4 (5p^2-10)+3p\\12p^2-2p^2+4+3p\\10p^2+3p+44$

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Gelneren [198K]

Answer:

-7/4

Step-by-step explanation:

Recall that slope, m, is defined as the ratio rise to run: rise/run.

Note that if we start at x = -2 (an arbitrary choice), and move 6 units to the right, we end up at x = 4. This is the 'run.' Simultaneously, y starts at 1 and decreases to - 6, a change of -7.

Thus, the slope of the line through these two points is m = rise/run = -7/4

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2 years ago

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Eli wants to combine 0.5 gallon of a 10% acid solution with some 35% acid solution to make a 15% acid solution. How much of the

emmainna [20.7K]

Answer:

<h3> 0.125 galon of 35% acid solution</h3>

Step-by-step explanation:

0.5 gallon of a 10% acid solution

10%•0.5 = 0.05 gallon of acid in that solution

x gallon of 35% acid solution

35%•x = 0.35x gallons of acid in that solution

0.05 + 0.35x total of gallons of acid in both solutions

(0.5+x) gallons of 15% acid solution

15%(0.5+x) = 0.15(0.5+x) gallons of acid in that solution

the amount of gallons of acid didn't change after mixing, so:

0.05 + 0.35x = 0.15(0.5 + x)

0.05 + 0.35x = 0.075 + 0.15x

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0.2x = 0.025

×5 ×5

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3 years ago

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Please help me tysm!

Nikolay [14]

Answer:

Step-by-step explanation:

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3 years ago

How many cones of radius 1 m and height 1 m have total volume equal to the volume of a sphere with a radius 1m?

DiKsa [7]

Vcone=1/3(hpir^2)
Vsphere=(4/3)pir^3

evaluate
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vsphere=4/3pi1^3=4pi/3

pi/3 times what=4pi/3
times both sides by 3
pi times what=4pi
divide both sides by pi
1 times what=4
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4 cones

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3 years ago

A store has 7 red shirts, 15 black shirts, 13

AleksAgata [21]

Answer:First you have to add all of the shirts together, which gives you: 40

Since 15 of those are black, then you need to put those 15 over the total number of 40, making it 15/40.

Then you must simplify by the highest number that will go into both, and since that number is 5, it will then go into 15 three times and it will go into 40 eight times.

That leaves you with the answer of: 3/8

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3 years ago