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oksano4ka [1.4K]
3 years ago
10

12.5=2g-3.5 with steps. THX

Mathematics
1 answer:
jeyben [28]3 years ago
6 0
12.5=2g-3.5
add -3.5 to 12.5
16=2g
divide 16 by 2
g=8
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A cone has a radius of 24 cm and a volume of 1,920 cm cubed. What is the Volume of a similar cone with a radius of 18 cm?
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24 * 3/4 = 18

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the volume of smaller cone would be 3³ / 4³ = 27 / 64 times smaller

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A box has a square base with an area of 16 sq.in. Its is 14 inches tall. what is the volume?
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224 inches cubed.

Step-by-step explanation:

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Read 2 more answers
If x+a is a factor of 2x²+2ax+5x+10,find a.
vazorg [7]

If x+a is a factor of the polynomial, it means that -a is a root of the polynomial.

In fact, if a polynomial p(x) has a root x_0 (i.e. p(x_0)=0), then the polynomial is divisible by (x-x_0)

In your case, you know that the polynomial is divisible by (x+a)=(x-(-a)), so -a is a solution.

Let's evaluate p(-a) and set it to zero:

2(-a)^2+2a(-a)+5(-a)+10 = 0 \iff 2a^2-2a^2-5a+10=0 \iff -5a+10 = 0 \iff a = 2

We can check the answer: if a=2 the polynomial becomes

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And we're claiming that -a=-2 is a root of this polynomial:

2(-2)^2+9(-2)+10 = 2\cdot 4 - 18 + 10 = 0

5 0
3 years ago
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