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solong [7]
3 years ago
6

Each of four test scores in Connie’s class is to be weighted equally. On the first three tests, Connie scored 80%, 90% and 95%.

What percent must she score on her fourth test to have an overall average of exactly 90%?
Mathematics
2 answers:
Zanzabum3 years ago
7 0

Answer:

95%is the answer

Step-by-step explanation:

Nataly_w [17]3 years ago
6 0

Answer:

95%

Step-by-step explanation:

We can use the balancing method to do this.. first what is the total below 90?

The total is 10% because 90-80 which was the only percentage below 90 is 10%. Then, what is the total above 90?

The total is 5% because the only percentage above 90 is 95 and 95-90 is 5%

Now we use the balancing method to get from 5-10.

Using the balancing method we get 95%

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sineoko [7]

Answer:

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4 0
3 years ago
Find an equation for the line parallel to 3y+6X=6 and goes through the point (-3,-7) please write in y=mx+b
seropon [69]

Answer: y=-6x-25

Step-by-step explanation:

Find slope of original line by solving for y

3y+6x=6

y+6x=2

y = -6x+2 <--- we have found the slope is -6

Using y-y1 = m (x-x1) find the equation for the parallel line:

y-(-7)= -6(x-(-3)) <--- plug in the point coordinates and slope into the equation and solve for y

y+7=-6x-18

y=-6x-25

5 0
2 years ago
You charge customers $18.75 for lube service, parts, and labor. Assuming you take one hour's labor at $15, and the parts cost $3
hram777 [196]
Let
T---------> <span>the tax rate on the parts in $

we know that
$18.75=$15+$3.50+$T
T=18.75-15-3.5
T=$0.25
so
$3.50----------> 100%
$0.25--------> x
x=0.25*100/3.50------> x=7.14%------> x=7.1%

the answer is
7.1%</span>
5 0
3 years ago
Pleasee guyssss. I need to fill this space haha
Inga [223]

Answer:

Center: (-13,-2) Radius: 9

Step-by-step explanation:

because i know

5 0
3 years ago
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How do you write a b c d and e in an exponent way
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