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lora16 [44]
3 years ago
11

The highest possible score on an entrance exam is 800 points. which scores are between 80% and 90% of the highest possible score

? (select all that apply)
A.710 points
B.810 points
C.585 points
D.645 points
Mathematics
1 answer:
AveGali [126]3 years ago
4 0

Answer:

A. 710 points and D. 645 points

Step-by-step explanation:

Its kind of like the butterfly method in middle school. It says the highest you can get on the exams is 800 points. So, it would be 710/800 = ?/100. But now you have to find the numerator that goes over 100. Now you cross multiply 710 and 100 and divide it by 800. The ? is now 88.75 or 89% (rounded to nearest hundredth). Now you repeat the method again but this time replace 710 with 645. The equation is now 645/800 = ?/100. You cross multiply 645 and 100 and divide it by 800. Now the ? is now 80.62 or 81% ( rounded to the nearest hundredth).

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A rectangle is drawn so that the width is 2 feet shorter than the length. The area of the rectangle is 3 feet square
Anastasy [175]

Answer:

length =3 feet

width = 1feet

Step-by-step explanation:

let the length be x

the width = x-2

area = length * width

3 = x*(x-2)

3 = x^{2} - 2x

x^{2} -2x-3 =0x^{2} +x -3x -3 =0

x(x+1)-3(x+1) =0

(x-3)(x+1)=0

x -3=0

x=3

thus,

the length =x =3 feet

the width =x-2 =3-2 = 1feet

8 0
3 years ago
Write the exact value of the area of a square with a side length of √30 square units? *
liberstina [14]

Answer:

A=30u^2

Step-by-step explanation:

Information that we know about the square:

side length: l=\sqrt{30u^2} which can asol be expressed as: l=\sqrt{30}u

we can use this information to calculate the area by the formula for the area of a square:

A=l^2

we subtitute the side length:

A=(\sqrt{30}u )^2

the square root and the squared exponent cancel each other out (because they are opposite operations) and since this is an area it must have squared units:

A=30u^2

The exact value of the area of the square is 30u^2

6 0
3 years ago
Henry planted 24 tomato plants and 18 green bean plants in his garden. Simon planted 30 tomato plants and 25 green bean plants i
jasenka [17]

Answer:

Its different.

Step-by-step explanation:

Henry's garden:

divide 24 and 18 by 6: you get 4:3 ratio of tomato:green bean

Simon's garden:

divide both 30 and 25 by 5: you get 6:5 ratio of tomato:green bean.

6 0
3 years ago
What is the slope of (5, -3) and (8, -5) tell me how you got your answer
Viktor [21]
To find the slope, you find the change in y-values over the change in x-values. 

Your first point is: (5,-3)
Your second point is (8, -5)
Your x-values are: 5 and 8
Your y-values are -3 and -5
The equation to find slope is: slope = (y2-y1)/(x2-x1)
       - The 2s and 1s indicate which point the values belong to, it makes sure               that you align the right x-value with its correct y-value. It doesn't matter               which point you assign as 1 or 2, as long as the values match
             - So, x-value 5 will match with y-value -3, and x-value 8 will match with                  y-value -5

Now you plug in out values :
slope = (y2-y1)/(x2-x1)
slope = (-5-(-3))/(8-5)
slope = (-2)/(3)
slope = -2/3


6 0
4 years ago
Read 2 more answers
How do you know where and when the graph crosses the horizontal asymptote?
Genrish500 [490]
The horizontal asymptote is the line which the curve approaches to cross but never crosses the boundary. The horizontal asymptote can be identified when the exponent in the denominator<span> of the function is larger than the exponent in the numerator. If not, no horizontal asymptote exists. WHen there is, we equate the denominator to zero and get x</span>
7 0
3 years ago
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