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2 years ago

In the example,-38+(-24)will be negative before finding the sum?

Mathematics

1 answer:

erastova [34]2 years ago

7 0

Answer:

-62

Step-by-step explanation:

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Please help Explanation will be appreciated thanks,

Genrish500 [490]

Answer: A; 6.3%

Step-by-step explanation:

Problem 1

For the first problem, we first want to find y so that we can plug it into the expression.

We can use elimination method for the system of equations to solve.

3x+3y=21

3x-y=5

We subtract both equations to eliminate x.

4y=16 [divide both sides by 4]

y=4

Now that we know y, we can plug it into the expression.

$\frac{4}{2} -3$ [divide]

$2-3$ [subtract]

$-1$

We know that the answer is A.

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Problem 2

For the second problem, we need to know how to calculate percent error. The formula for precent error is $\frac{|measured-exact|}{exact} *100%$ . We know that the exact value is 80 because the buyer was supposed to given 80. 75 is the measured value because that was what the buyer was given.

$\frac{|75-80|}{80} *100%$ [subtract]

$\frac{|-5|}{80} *100%$ [solve absolue value]

$\frac{5}{80} *100%$ [divide]

$0.0625*100%$ [multiply]

$6.25$

Since the problem said to round to one decimal place, we know that the answer is 6.3%.

4 0

2 years ago

How do you find a percent of a number PLEASE HEP

liberstina [14]

How to calculate percentage of a number. Use the percentage formula: P% * X = Y
Convert the problem to an equation using the percentage formula: P% * X = Y.
P is 10%, X is 150, so the equation is 10% * 150 = Y.
Convert 10% to a decimal by removing the percent sign and dividing by 100: 10/100 = 0.10.

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2 years ago

Select the graph that represents the solution to the following inequality: Ix-3I<3

Dominik [7]

The correct answer is: Answer choice: [C]:_________________________________________________→ {the number line/ graph provided for choice: [C] ; as follows}:_________________________________________________

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3 years ago

A bird's nest is 12 feet above the ground. A mole's den is 12 inches below the ground. What is the difference in height of these

zysi [14]

Answer:

13ft

Step-by-step explanation:

12in = 1ft the difference in height is 13ft

8 0

2 years ago

(-22, -3) and (1, -3)?

just olya [345]

Step-by-step explanation:

$(x1y1) = ( - 22 - 3) \\ (x2y2) = (1 - 3) \\ d = \sqrt{ {x 2 - x1) }^{2} } + {(y2 - y1) }^{2} \\ \sqrt{ {(1 - - 22)}^{2} } + {( - 3 - - 3)}^{2} \\ \sqrt{ {(1 + 22)}^{2} } + {(0)}^{2} \\ \sqrt{ {(23)}^{2} } \\ = 23 \: \: \: \: answer \: \: \: please \: \: supprt \: \: and follow \: \: me$

7 0

2 years ago

In the example,-38+(-24)will be negative before finding the sum? ​

In the example,-38+(-24)will be negative before finding the sum?