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3 years ago

The average of 6 numbers is 7. When a 7th number is addedThe average of all numbers is 0. What is the seventh number?

1 answer:

4 0

-- The average of 6 numbers is 7.
    So those 6 numbers must add up to 42.

-- If one more number results in an average of zero,
   the new number must be -42 .
   Then all 7 numbers add up to zero.

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Can someone please explain to me how to tell if a number it's prime or not

slavikrds [6]

Answer:

A prime number is a number that can only be divided by 1 and itself.

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3 years ago

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Need Help!!! ASAP

RoseWind [281]

Answer:

$P(green)+P(yellow)=\frac{3}{8}+\frac{1}{8}$

$P(green)+P(yellow)=\frac{1}{4}+\frac{1}{4}$

$P(green)+P(yellow)=\frac{3}{7}+\frac{1}{14}$

Step-by-step explanation:

The given probabilities are:

$P(red)=\frac{2}{7}$

$P(blue)=\frac{3}{14}$

Their sum is $P(red)+P(blue)=\frac{2}{7}+\frac{3}{14}$

The probabilities that will complete the model should add up to $\frac{1}{2}$ so that the sum of all probabilities is 1.

$P(green)+P(yellow)=\frac{2}{7}+\frac{2}{7}\ne\frac{1}{2}$

$P(green)+P(yellow)=\frac{3}{8}+\frac{1}{8}=\frac{1}{2}$

$P(green)+P(yellow)=\frac{1}{4}+\frac{1}{4}=\frac{1}{2}$

$P(green)+P(yellow)=\frac{5}{21}+\frac{11}{21}\ne\frac{1}{2}$

$P(green)+P(yellow)=\frac{3}{7}+\frac{1}{14}=\frac{1}{2}$

5 0

3 years ago

I can't find the value of Y

Lubov Fominskaja [6]

114 = 19y

This is true because they are vertical angles. Now, let's divide both sides by 19

6 = y

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If x = 8 units, y = 3 units, and h = 9 units, find the area of the trapezoid shown above using decomposition.

lys-0071 [83]

Answer:

Step-by-step explanation:

because you do 8x9 and its 72

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3 years ago

Why is the distributive property appropriate for two-digit multiplication?

Rina8888 [55]

Here's an example:

$25\times93=(20+5)\times(90+3)$
$25\times93=20\times(90+3)+5\times(90+3)$
$25\times93=20\times90+20\times3+5\times90+5\times3$
$25\times93=1800+60+450+15$
$25\times93=2325$

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3 years ago