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oksano4ka [1.4K]
3 years ago
15

the problem is in the snippet below please only correct answers hmu if you are good at these and i will just have you answer mor

e questions so i can just pay you like 100??

Mathematics
1 answer:
Andrej [43]3 years ago
6 0

Answer:

a = 6   b=  7

Step-by-step explanation:

4 (b-1) = 3b + 3       substitue for a

4b - 4 = 3b + 3       subtract 4b from both sides

-4 = 3b + 3 - 4b       =        -4 = -b + 3        combine 3b and (-4b)

-7 = -b      divide by -1 for both sides

7 = b


4a = 3 × 7 + 3       substitute for b

4a = 24             combine like terms

a = 6       divide by 4 on both sides


a = 7 -1

a = 6


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A market research firm knows from historical data that telephone surveys have a 36% response rate. In a random sample of 280 tel
Rasek [7]

Answer:

0.6604

Step-by-step explanation:

Given that a market  research firm knows from historical data that telephone surveys have a 36% response rate.

Sample size of random sample = 280

We know for samples randomly drawn of large size sample proportion follows a normal distribution with mean= sample proportin and std error

= \sqrt{\frac{pq}{n} }

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Using normal distribution values we can find\

P(33.5p.c. < p < 39pc)\\= P(0.335

3 0
3 years ago
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A mixture contains forty ounces of glycol and water and is ten percent glycol. If the mixture is to be strengthened to twenty-fi
telo118 [61]
If we add 8 oz of glycol to the 40 oz mixture we have 48 oz of mixture and 4+8 = 12 oz glycol
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the answer is 8 oz
4 0
3 years ago
Read 2 more answers
Select all the expressions that are equivalent to 9 + 7x – 3y. 9 + 7x + 3y 9 – 7x – 3y 9 – 7x + 3y 9 + 7x + (–3y) 9 – (–7)x – 3y
bulgar [2K]

0^9 +7x+189yx−3y

o

9

+7x−3y

9

+7x+3y

9

−7x−3y

9

−7x+3y

9

+7x+189yx−3y

2 Collect like terms.

{o}^{9}+(7x+7x-7x-7x+7x)+(-3{y}^{9}+3{y}^{9}-3{y}^{9}+3{y}^{9})+189yx-3y

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9

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+3y

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−3y

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{o}^{9}+7x+189yx-3y

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6 0
2 years ago
The Revenue for the week is $2000, and labor cost consists of two workers earning $8 per hour who work 40 hours each, what is la
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8 0
3 years ago
Solve for q.<br> a=qb+r<br> What is q equal to?<br> q=a−r−b<br> q=a−r/b<br> q=a/b −r<br> q=a/rb
Mademuasel [1]

The given equation is a=qb+r

We need to solve the equation for q.

<u>Value of q:</u>

The value of q can be determined by solving the equation a=qb+r for q.

Thus, subtracting both sides of the equation by r, we get;

a-r=qb

Now, dividing both sides of the equation by b, we have;

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Simplifying the terms, we get;

\frac{a-r}{b}=q

Therefore, the value of q is q=\frac{a-r}{b}

Hence, Option B is the correct answer.

7 0
3 years ago
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