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3 years ago

32. Mariah bought a shirt for $28.50 and a

Mathematics

1 answer:

Nana76 [90]3 years ago

5 0

Answer:

The correct answer is A because subtract 28.50 from 45.50 and you get the answer of 17$ for the belt

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A full dose of a different medicine is 600 mg. Ms. Mehta took 75% of a dull dose. How much medicine did she take?

GuDViN [60]

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3 years ago

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MrRa [10]

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3 years ago

Use mental math to solve 4576 + 2842

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3 years ago

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R 3. The mean of 4 numbers is 8. Three of the numbers add up to 22. What is the last number?

statuscvo [17]

<h2><em><u>Solution</u></em> : </h2>

let the last number be x

we know,

$\boxed{mean = \frac{sum \: \: of \: \: all \: \: observations}{number \: \: of \: \: observations} }$

So,

$\hookrightarrow \: 8 = \dfrac{22 + x}{4}$

$\hookrightarrow \: 8 \times 4 = 22 + x$

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$\hookrightarrow \: x = 32 - 22$

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therefore, the last number is 10.

7 0

2 years ago

I dont understand this problem

Fiesta28 [93]

Answer:

D and F

Step-by-step explanation:

$x^{2}+4x+4=12$ can be rewritten as $x^{2} +4x-8=0$ .

From there you can use the quadratic formula $x=\frac{-b±\sqrt{b^{2}+4ac } }{2a}$ (ignore the A, I can‘t seem to remove it), where a=1, b=4, and c=-8.

$x=\frac{-4±\sqrt{4^{2}-4(1)(-8)} }{2(1)}$

Then you get $x=\frac{-4±\sqrt{16+32}}{2}$

Then you get $x=\frac{-4±\sqrt{48} }{2}$

So $x=-2±\frac{4\sqrt{3} }{2}$

Which means $x=-2+2\sqrt{3}$ or $-2-2\sqrt{3}$ which are choices D and F.

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2 years ago