2 years ago

Melanie spent $40 in 4 hours while shopping at the mall. How much money has changed hands? A) $10 B) $40 C) -$10 D) -$40

Mathematics

1 answer:

S_A_V [24]2 years ago

4 0

I actually think its b cause it can't be d (thats obvious) yh........but i might be wrong

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PLEASE HELP ME I BEG YOU

Rus_ich [418]

You need to find "two-fifths of 30." Of here means multiplication:

$\begin{aligned}\dfrac{2}{5}\cdot 30 &= \dfrac{2}{5}\cdot\dfrac{30}{1}\\[0.5em] &= \dfrac{60}{5}\\[0.5em] &= 12\end{aligned}$

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5 0

2 years ago

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2 years ago

What happens to the mean of the data set {2, 4, 5, 6, 8, 2, 5, 6} if the number 7 is added to the data set?

konstantin123 [22]

Answer:

It increases

Step-by-step explanation:

The mean of the given data set of 8 values is 4.75 ( $\frac{2+4+5+6+8+2+5+6}{8}$ )

Adding 7 into the data set also increase the number of data points to 9, so the mean becomes: $\frac{2+4+5+6+8+2+5+6+7}{9}$ , which is equal to 5

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2 years ago

Plz help I will give brainiest, how would you solve 4x + 2y = 18 3x - 5y = 20 by elimination showing all of the work and the fin

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2 years ago

Find the value of n?

Svet_ta [14]

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n=q^2

Step-by-step explanation:

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