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4 years ago

Multiply 6y(y-21) need help

Mathematics

2 answers:

Lady bird [3.3K]4 years ago

7 0

The answer would be 6y^2-126y

Roman55 [17]4 years ago

5 0

Answer:

6y^2-126y

Step-by-step explanation:

In order to solve this, you would multiply 6y by the numbers in the parenthesis.

6y multiplied by y is 6y^2 and 6y multiplied by 21 is 126y.

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Austin takes 4 hours to make 2 backpacks and a handbag. The time he takes to

lys-0071 [83]

Step-by-step explanation

b = 2h is given

2 b + h = 4 hours is given sub in the top equation

2 (2h) + h = 4

5h = 4

h = 4/5 hr or 48 minutes

7 0

3 years ago

Solve A = p(1+rt) for t

Svetlanka [38]

A = p(1 + rt)
A/p = 1 + rt
rt = A/p - 1
t = (A/p - 1)/r

7 0

3 years ago

Write 625 using exponents as many as you can

dezoksy [38]

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8 0

3 years ago

Find the value of the variable.

anzhelika [568]

Answer:

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8 0

3 years ago

In order to estimate the difference between the average hourly wages of employees of two branches of a department store, two ind

liberstina [14]

Answer:

Step-by-step explanation:

Hello!

You have two populations of interest and want to compare them. If you define the study variables as:

X₁: average hourly wages of an employee of the Downtown store.

n₁= 25

X[bar]₁= $9

S₁= $2

X₂: average hourly wages of an employee of the North Mall store.

n₂= 20

X[bar]₂= $8

S₂= $1

Both samples taken are independent, assuming that both populations are normal and that their population variances are equal I'll use the Student's-t statistic with a pooled sample variance to calculate the Confidence interval:

95% CI for μ₁ - μ₂

(X[bar]₁-X[bar]₂) ± $t_{n_1+n_2-2; 1-\alpha /2} * (Sa*\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } )$

$Sa^2= \frac{(n_1-1)S_1^2+(n_2-1)S_2^2}{n_1+n_2-2}$

$Sa^2= \frac{24*4+19*1}{25+20-2}= 2.67$

Sa= 1.64

$t_{n_1-n_2-2;1-\alpha /2} = t_{43; 0.975} = 2.017$

(9-8)±2.017* $(1.64*\sqrt{\frac{1}{25} +\frac{1}{20} } )$

[0.007636;1.9923]

I hope it helps!

6 0

3 years ago