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pochemuha
4 years ago
12

You earned a 90% on my science test you answer 18 questions correctly how many questions were on the test

Mathematics
2 answers:
Gre4nikov [31]4 years ago
3 0
90% x 18 = 16.2 

Therefore, you answered about 16 questions correctly out of 18. 
valkas [14]4 years ago
3 0
Divide 18 by the score in decimal form .9 to get 20
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PLEASE HELP ME GET THIS DONE
Grace [21]

Answer:

C

Step-by-step explanation:

The line on the left has equation y = x - 2

The start of the line has an open circle at x = 3 meaning that x ≠ 3

The line is defined as y = x - 2 for x < 3

The line on the right has equation y = x - 1

The start of the line has a closed circle at x = 3 meaning that x can equal 3

The line is defined as y = x - 1 for x ≥ 3

Thus the definition of the function is C

4 0
3 years ago
Austin deposits $3000 into an account that pays simple interest at a rate of 4% per year. How much interest will he be paid in t
Arturiano [62]

Answer:

120 per year if im not wrong

Step-by-step explanation:

1% of 3000 is 30

30x4= 120

its 30x whatever percentage its at because 3000/100= 30

4 0
3 years ago
Write the expression in factored form s^2-20s-100
KatRina [158]

Answer:

The factors of given expression are 10+10√2 and 10-10√2.

Step-by-step explanation:

We have given a quadratic expression.

s²-20s-100

We have to find factors of given expression.

We use quadratic formula to find factors.

x = (-b±√b²-4ac) / 2a

From given expression, a = 1 , b = -20 and c = -100

Putting values in above formula, we have

x = (-(-20)±√(-20)²-4(1)(-100) ) / 2(1)

x = (20±√400+400 ) / 2

x = (20±√800) /  2

x = (20± √400×2) / 2

x = (20±20√2) / 2

x = 10±10√2

Hence, the factors of given expression are 10+10√2 and 10-10√2.

3 0
3 years ago
What is the rate of change between (-8,- 8) and (0,8)
iren [92.7K]

{ \qquad\qquad\huge\underline{{\sf Answer}}}

We need to find thr rate of change (slope) of the line joining these two points ~

\qquad \sf  \dashrightarrow \: m =   \dfrac{rise}{run}

\qquad \sf  \dashrightarrow \: m =  \cfrac{8 - ( - 8)}{0 - ( - 8)}

\qquad \sf  \dashrightarrow \: m =  \cfrac{8  +  8}{0  + 8}

\qquad \sf  \dashrightarrow \: m =  \cfrac{16}{8}

\qquad \sf  \dashrightarrow \: m = 2

Slope of the line (m) joining the two points is 2 ~

7 0
2 years ago
Find minimum value for the perimeter of the rectangle.​
katrin [286]

Answer:

possible lengths

45 and 2

3 and 20

5 and 18

15 and 6

10 and 9  

there perimeter will be

94

46

46

27

38

answer to this question is  15 and 6

7 0
3 years ago
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