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levacccp [35]
3 years ago
7

your grade varies directly with the time you study if you study for 40 minutes your grade is an 80 how long should you study to

get a 95
Mathematics
1 answer:
Anna71 [15]3 years ago
7 0

Answer:

47.5 minutes

Step-by-step explanation:

40 min = 80

x min = 95

40/80 = x/95

3800 = 80x

x = 47.5

-Chetan K

You might be interested in
-8/9 - (2 1/3)<br> show all your work
Sauron [17]

Answer:

1 8/9 - 1 2/3 = 2/

9

≅ 0.2222222

Step-by-step explanation:

How do you solve fractions step by step?

Conversion a mixed number 1 8/

9

to a improper fraction: 1 8/9 = 1 8/

9

= 1 · 9 + 8/

9

= 9 + 8/

9

= 17/

9

To find a new numerator:

a) Multiply the whole number 1 by the denominator 9. Whole number 1 equally 1 * 9/

9

= 9/

9

b) Add the answer from previous step 9 to the numerator 8. New numerator is 9 + 8 = 17

c) Write a previous answer (new numerator 17) over the denominator 9.

One and eight ninths is seventeen ninths

Conversion a mixed number 1 2/

3

to a improper fraction: 1 2/3 = 1 2/

3

= 1 · 3 + 2/

3

= 3 + 2/

3

= 5/

3

To find a new numerator:

a) Multiply the whole number 1 by the denominator 3. Whole number 1 equally 1 * 3/

3

= 3/

3

b) Add the answer from previous step 3 to the numerator 2. New numerator is 3 + 2 = 5

c) Write a previous answer (new numerator 5) over the denominator 3.

One and two thirds is five thirds

Subtract: 17/

9

- 5/

3

= 17/

9

- 5 · 3/

3 · 3

= 17/

9

- 15/

9

= 17 - 15/

9

= 2/

9

For adding, subtracting, and comparing fractions, it is suitable to adjust both fractions to a common (equal, identical) denominator. The common denominator you can calculate as the least common multiple of both denominators - LCM(9, 3) = 9. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 9 × 3 = 27. In the following intermediate step, it cannot further simplify the fraction result by canceling.

In other words - seventeen ninths minus five thirds = two ninths

8 0
3 years ago
What is the sum of 2×x+4+2×x
Airida [17]
It would be: 2 × x + 4 + 2× x
= 2x + 4 + 2x
= 4x + 4

In short, Your Final Answer is 4x+4

Hope this helps!
6 0
3 years ago
Read 2 more answers
What is the value of 2x^3+4x^2-6x, where x= 3? A. 63 B.45 C. 35 D. 99
Sunny_sXe [5.5K]
2(3)^3 + 4(3)^2-6(3)
2x 27 + 4x9 - 18
54 + 36 -18
= 72
5 0
4 years ago
HELPP Pedro is creating an online racquetball game. In one play, the motion of the ball across the screen is partially modeled b
Mila [183]

Using symmetry concepts, it is found that there is a line of symmetry at x = 50, option D.

  • A line symmetry is an imaginary line that runs through a graph, dividing it into two equal parts.
  • A point symmetry is when every point is equidistant to the line of symmetry, but in opposite directions.

  • In this problem, the values of x range from 0 to 100, being divided(definition changed) at 50, thus, there is a line of symmetry at x = 50, and option D is the correct one.

A similar problem is given at brainly.com/question/16679081

8 0
3 years ago
what formula would find the surface area of a right cylinder where h is height, r is radius, LA is lateral area, and BA is base
ra1l [238]
Total surface area = 2(pi)(r^2) + 2(pi)(r)(h)
6 0
3 years ago
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