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4 years ago

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:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Algebra I

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

Step-by-step explanation:

Step 1: Define Systems

-4x + 16 = y

2x - 32 = 2y

Step 2: Solve for x

Substitution

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

Step 3: Solve for y

Define original equation: -4x + 16 = y
Substitute in x: -4(32/5) + 16 = y
Multiply: -128/5 + 16 = y
Add: -48/5 = y
Rewrite/Rearrange: y = -48/5

6 0

3 years ago