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notsponge [240]
4 years ago
14

Tim scored 35, 38, and 36 points on three tests. How many points should he get on the fourth test to get an average score of 40?

Mathematics
1 answer:
My name is Ann [436]4 years ago
4 0
I think 51 because if you were to do it reverse then it would be 40x4=160 then -35-36-38 it would be 51.
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Lisa got 9/10 gallon of olive oil from a gourmet shop. She calculated the quotient of 9/10 ÷ 2/5 . Explain what the quotient of
Anna11 [10]

Answer:

This would represent 9/4, or 2 1/4

Step-by-step explanation:

9/10 / 4/10 = 9/4

6 0
4 years ago
The number a is smaller than the number b by 1/5 of b. By what part of a is b bigger than a?
Ira Lisetskai [31]

Answer:

The number b is bigger than the number a by \dfrac{1}{4} of a.

Step-by-step explanation:

1. If the number a is smaller than the number b by 1/5 of b, then

a+\dfrac{1}{5}b=b.

Thus,

a=b-\dfrac{1}{5}b=\dfrac{4}{5}b,\\ \\b=\dfrac{5}{4}a.

2. Consider the expression b=\dfrac{5}{4}a:

b=\dfrac{5}{4}a=\dfrac{4}{4}a+\dfrac{1}{4}a=a+\dfrac{1}{4}a.

This gives you that the number b is bigger than the number a by \dfrac{1}{4} of a.

7 0
3 years ago
A bag contains six red marbles three blue marbles and five green marble the three marbles are drawn out of the bag what is the p
tia_tia [17]

Answer:

Step-by-step explanation:

Red = 6

Blue = 3

Green = 5

Total = 14

First marble = 6/14  = 3/7  You now have 5 reds and 13 total

Second Marble = 5 * 13  which brings you down to 4 red and 12 total.

Third Marble = 4/12 = 1/3

Result

P(3 Red) = 3/7 * 5/13 * 1/3     cancel the 3s

P(3 Red) = 1/7 * 5/13

P(3 Red) = 5/91

P(3 Red) = 0.0549 . Rounding to the nearest 1/100 depends on what you have been told about rounding. I would say the answer is 0.05 but your teacher may say something different.

8 0
3 years ago
Write an equation: Gianna finds $20 on the floor, and she starts saves her allowance
damaskus [11]

Answer:

5x +20

Step-by-step explanation:

8 0
3 years ago
PLEASE HELP ME ILL GIVE BRAINLIEST IF YOU SHOW YOUR WORK
fomenos

Answer:

(32/5, -48/5)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients
  • Coordinates (x, y)
  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define Systems</u>

-4x + 16 = y

2x - 32 = 2y

<u>Step 2: Solve for </u><em><u>x</u></em>

<em>Substitution</em>

  1. Substitute in <em>y</em>:                                                                                                  2x - 32 = 2(-4x + 16)
  2. Distribute 2:                                                                                                    2x - 32 = -8x + 32
  3. [Addition Property of Equality] Add 8x on both sides:                                10x - 32 = 32
  4. [Addition Property of Equality] Add 32 on both sides:                                   10x = 64
  5. [Division Property of Equality] Divide 10 on both sides:                               x = 32/5

<u>Step 3: Solve for </u><em><u>y</u></em>

  1. Define original equation:                                                                               -4x + 16 = y
  2. Substitute in <em>x</em>:                                                                                                 -4(32/5) + 16 = y
  3. Multiply:                                                                                                           -128/5 + 16 = y
  4. Add:                                                                                                                   -48/5 = y
  5. Rewrite/Rearrange:                                                                                            y = -48/5
6 0
3 years ago
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