3 years ago

Write and algebraic expression:

Mathematics

1 answer:

Triss [41]3 years ago

6 0

Answer:

21b

Step-by-step explanation:

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Evaluate 9 x 8 = (10 x 8) - ( blank x 8) =80 - blank = blank

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Answer:

see below

Step-by-step explanation:

9 x 8 = (10 x 8) - ( blank x 8) =80 - blank = blank

We are replacing 9 with 10 minus something

9 = 10 -1

9 x 8 = (10 x 8) - ( 1 x 8)

80 - 8

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Use compatible numbers to estimate the quotient 358 divided by 3

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What is the solution to <img src="https://tex.z-dn.net/?f=-12%5Cgeq%20x-4" id="TexFormula1" title="-12\geq x-4" alt="-12\geq x-4

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The four-member math team at Pecanridge Middle School is chosen from the math club, which has three girls and five boys. How man

cestrela7 [59]

Answer:

$Total\ Selection = 30\ ways$

Step-by-step explanation:

Given

Girls = 3

Boys = 5

Required

How many ways can 2 boys and girls be chosen?

The keyword in the question is chosen;

This implies combination and will be calculated as thus;

$Selection =\ ^nC_r = \frac{n!}{(n-r)!r!}$

For Boys;

n = 5 and r = 2

$Selection =\ ^5C_2$

$Selection = \frac{5!}{(5-2)!2!}$

$Selection = \frac{5!}{3!2!}$

$Selection = \frac{5 * 4 * 3!}{3!*2 * 1}$

$Selection = \frac{20}{2}$

$Selection = 10$

For Girls;

n = 3 and r = 2

$Selection =\ ^3C_2$

$Selection = \frac{3!}{(3-2)!2!}$

$Selection = \frac{3!}{1!2!}$

$Selection = \frac{3 * 2!}{1 *2!}$

$Selection = \frac{3}{1}$

$Selection = 3$

Total Selection is calculated as thus;

$Total\ Selection = Boys\ Selection * Girls\ Selection$

$Total\ Selection = 10 * 3$

$Total\ Selection = 30\ ways$

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4 years ago

Ali is quite the baseball player. Forty two percent of her hits are home runs if Ali hit 150 balls last season how many of those

ra1l [238]

63 hits were home runs

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4 years ago