Helppppp please my is on the line

Mathematics

1 answer:

s344n2d4d5 [400]3 years ago

3 0

Answer:

i wanna say .05

Step-by-step explanation:

i did the two numbers divided then just rounded the decimal

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Hillary unraveled 3.0 centimeters of ribbon and then continued to unravel 1.5 more centimeters.

galina1969 [7]

Thanks for the free points hope you find your awnser!

3 0

2 years ago

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.