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Whitepunk [10]
3 years ago
10

PLZ HELP WILL GIVE BRAINLIEST!!!

Mathematics
1 answer:
kondor19780726 [428]3 years ago
6 0

Answer:

The answer is A.

Step-by-step explanation:

It's to much , sorry.

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If D=20 miles when T=15 minutes, write a proportion to find D for T=20 minutes
Igoryamba
D/20=20/15

d=400/15

d=80/3

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3 years ago
Evaluate 2x2 - 1 when x = 3.
Charra [1.4K]

Hello!

2.x^2 - 1 = 2.3^2 - 1 = 2.9 - 1 = 18-1 = 17

Good luck!

4 0
3 years ago
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8 0
3 years ago
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Simplify the expression given below. x+2/4x^2+5x+1 * 4x+1/x^2-4
GenaCL600 [577]

Answer:

\frac{1}{(x+1)(x-2)}

Step-by-step explanation:

\frac{x+2}{4x^2 + 5x + 1} \ \times \ \frac{4x+1}{x^2-4}\\\\=\frac{x+2}{4x^2 + 4x  + x + 1} \ \times \ \frac{4x+1}{x^2-2^2}\\\\=\frac{x+2}{4x(x + 1)  + 1( x + 1)} \ \times \ \frac{4x+1}{(x - 2)(x + 2)}    \ \ \ \ \  \ \ \ [ \ (a^2 - b^2 = (a-b)(a+b) \ ]\\\\\\=\frac{x+2}{(4x + 1)(x+1)} \ \times \ \frac{4x+1}{(x-2)(x+2)}\\\\=\frac{1}{(x+1)} \ \times \ \frac{1}{(x-2)}\\\\= \frac{1}{(x+1)(x-2)}

8 0
3 years ago
How much principal, to the nearest dollar, should you invest at 4% in order to have $3,000 for a vacation to Europe in 3 years?
spayn [35]
T's going to make a difference whether that 4 percent is compounded more 
<span>than once a year. </span>

<span>We'll do the calculation assuming it's compounded only once a year, and if it </span>
<span>turns out to be compounded more often than that, then the calculation will </span>
<span>come out on the low side, and you'll wind up with a little bit more than $3,000. </span>

P<span> times (1.04)</span>3<span> = $3,000 </span>

P<span> = </span>3,000/<span>(1.04)3</span><span> = $2,666.980769 or </span><span>$2,667</span>
5 0
3 years ago
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