2 years ago

Answer each question and explain your reasoning.

Mathematics

2 answers:

beks73 [17]2 years ago

7 0

1. 30 mins
2. 6 mins
3. 45 mins

SVETLANKA909090 [29]2 years ago

5 0

Answer:

1. 30 mins

Step-by-step explanation:

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madam [21]

It’s A and B or C and D

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2 years ago

Determine if true:<br> 8x2-63=-40

prohojiy [21]

Answer:

False

Step-by-step explanation:

8x2=16

16-63=-47

-47=-40

The numbers do not match.

Hence, the equation is false.

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1 year ago

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30 baseballs

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3 years ago

2. The student council is sponsoring a concert as

Jlenok [28]

Answer:

80 adults must addent to make a complete $1,000

Step-by-step explanation:

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3 years ago

Solve the equation 7/z-1 = 9/z+4

algol [13]

Answer:

z is equal to 18.5

Step-by-step explanation:

When an equation is in the format a/b = c/d, the quickest way to simplify it is to cross multiply. Each side is multiplied by the other sides denominator, eliminating the division:

$\frac{7}{z-1} = \frac{9}{z + 4}\\7(z + 4) = 9(z - 1)\\7z + 28 = 9z - 9\\7z - 9z = -9 - 28\\-2z = -37\\z = 37/2\\z = 18.5$

So z is equal to 18.5

3 0

2 years ago