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.
[divide]
[subtract]

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
. 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.
[subtract]
[solve absolue value]
[divide]
[multiply]

Since the problem said to round to one decimal place, we know that the answer is 6.3%.
Answer:
4 cups
Step-by-step explanation:
Answer:
F = 5.67503704
Step-by-step explanation:
K=5/9(F+459.67) K = 5/9F / 5/9 = 255.376667 / 5/9 = F = 5.67503704
9/f would be your answer. Hope I helped
Answer:
point slope: y-7=2(x-4
slope intercept: y=2x-1
Step-by-step explanation:
point slope form: y-y1=m(x-x1)
(4,7) and m=2
using all the info here is it in point slope form: <u>y-7=2(x-4)</u>
turning the point slope equation into slope intercept...
slope intercept form: y=mx+b
first simplify y-7=2(x-4) into y-7=2x-8
then add 7 to both sides...
which would be <u>y=2x-1 </u>
and thats your answer!!