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3 years ago

Help=10pts 5,6,7,and 8 plz

Mathematics

2 answers:

Lesechka [4]3 years ago

8 0

Answer:

number 5:4/12

#6: 25/45

#7: 26/44

#8: 52/30

Step-by-step explanation:

Gemiola [76]3 years ago

6 0

Answer:

5) 1/3=x/12

12=3x

3x=12 (divide both sides)

12 divided by 3 = 4

therefore, x = 4

6) 5/9=25/y (cross multiply the numbers)

after cross multiplying you should get: 5y=225

divide both sides to get 45

therefore, y = 45

7) 26/z = 13/22 (cross multiply numbers)

after cross multiplying, you should get: 572=13z (swap the numbers)

after swapping the number, you should get: 13z=572 (divide both sides)

after dividing you should get 44

therefore, z = 44

8) b/30 = 2.6/1.5 (simplify expression)

after simplifying you should get: b/30=26/15 (cross multiply after)

after cross multiplying you should get: 15b = 780 (divide both sides)

after dividing both sides, you should get: 52

therefore, b = 52

Hope this helps:)!

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The Triangle Shirtwaist fire: a. resulted in laws that banned all manufacturing in New York. b. occurred during the Uprising of

kirza4 [7]

Answer:

E: Brought in its wake much-needed safety legislation.

Step-by-step explanation:

The Triangle Shirtwaist fire occurred on March 25, 1911. It is considered as one of the deadliest fire accidents in U.S. history.

This accident unfolded the truth of poor working conditions in factories and other workplaces that finally led to labor reforms.

The fire led to introduce the safety legislation, which required improved factory safety standards for workers.

7 0

3 years ago

Which are factors of x2 – 4x – 5? Check all that apply.

kramer

We have been given a quadratic formula. we need to find the factors. the factors are multiplied by each other and gives rise to the quadratic formula
x² - 4x - 5
to find the factors we need to multiply x² by -5 = -5x²
then the factors of 5x² should add up to -4x.
possible factors of 5x² are 1x and 5x.
to get a negative product one factor should be positive and other factor should be negative. the sum of the factors is -4x, then the larger factor should be negative.
From 1x and 5x, larger factor is 5x therefore it should be -5x.
sum of 1x and -5x is -4x.
we write -4x in the quadratic formula as (1x - 5x)
x² + 1x - 5x - 5
taking the common factors out
x (x + 1) - 5 (x + 1)
(x-5) (x+1)
therefore factors are (x -5) and (x + 1)
answers are 1) and 4)

5 0

3 years ago

Read 2 more answers

When x=12, y=8. Find x when y=12

Digiron [165]

x : y is equal to 12 : 8. These can be reduced or cancelled down to 3 : 2 in the same proportions. Therefore, when y is 12, you have to multiply the smallest value y can be by 6, and must do the same to the smallest x value to retain the proportions. x = 18 when y = 12.

6 0

3 years ago

Sam practices his guitar for 9 hours each week he practices each song for 3 1/2 hours. What is the greatest number of song he ca

liberstina [14]

Answer:

The greatest number of song he can practice in a week is 2.

Step-by-step explanation:

Suppose, the greatest number of song he can practice in a week is $x$

He practices each song for $3\frac{1}{2}$ hours. So, the total time required for practicing $x$ number of songs $= (3\frac{1}{2}*x)$ hours.

Given that, he practices his guitar for 9 hours each week.

So, the equation will be......

$3\frac{1}{2}*x= 9\\ \\ x= 9\div 3\frac{1}{2}\\ \\ x=9\div \frac{7}{2}=9 \times \frac{2}{7}=\frac{18}{7}= 2.571.... \approx 2$

(Rounded as the greatest whole number)

Thus, the greatest number of song he can practice in a week is 2.

4 0

3 years ago

Read 2 more answers

Monday: 10 apples and 5 bananas cost £4.20 Friday: 8 apples and 10 bananas cost £5.40 Find the cost of each - with an explanatio

motikmotik

Answer:

An apple costs £0.25

A banana costs £0.34

Step-by-step explanation:

Let a be apples and b be bananas.

10a+5b=4.2

8a+10b=5.4

Solve for a:

10a+5b=4.2

Subtract 5b from both sides

10a=4.2-5b

Subtract 4.2 from both sides

10a-4.2= -5b

Multiply both sides by -1

-10a+4.2=5b

8a+10b=5.4

Subtract 10b from both sides

8a=5.4-10b

Subtract 5.4 from both sides

8a-5.4= -10b

Multiply both sides by -1

-8a+5.4= 10b

Divide both sides by 2

-4a+2.7=5b

Combine equations:

-4a+2.7= -10a+4.2

Add 10a to both sides

6a+2.7=4.2

Subtract 2.7 from both sides

6a=1.5

Divide both sides by 6

a=0.25

An apple costs £0.25

Solve for b:

10a+5b=4.2

Subtract 10a from both sides

5b= -10a+4.2

Subtract 4.2 from both sides

5b-4.2= -10a

Multiply both sides by -1

-5b+4.2=10a

8a+10b=5.4

Subtract 8a from both sides

10b= -8a+5.4

Subtract 5.4 from both sides

10b-5.4= -8a

Divide both sides by 4

2.5b-1.35= -2a

Multiply both sides by 5

12.5b-6.75= -10a

Multiply both sides by -1

-12.5b+6.75=10a

Combine equations:

-12.5b+6.75= -5b+4.2

Add 12.5b to both sides

6.75=7.5b+4.2

Subtract 4.2 from both sides

2.55=7.5b

7.5b=2.55

Divide both sides by 7.5

b=0.34

A banana costs £0.34

If you would like to check and see if it is true, (I already checked, it is) you can use the formulas I gave at the start of the explanation.

10a+5b=4.2

8a+10b=5.4

a=0.25

b=0.34

3 0

3 years ago