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jeka94
3 years ago
8

Amy worked 16 hours more than Brayden last month. If Amy worked 8 hours for every 7 hours that Brayden worked, how many hours di

d they each work? (round answers to 1 decimal place) Amy worked hours Brayden worked hours
Mathematics
1 answer:
marishachu [46]3 years ago
8 0

Answer:

Amy worked for 128 hours while Brayden worked for 112 hours

Step-by-step explanation:

Given

Let A represents Amy and B represents Brayden

A = 16 + B ------(1)

A:B = 8:7------- (2)

Required

Find A and B;

Convert (2) to fractions

\frac{A}{B}  = \frac{8}{7}

Cross Multiply

7 * A = 8 * B

7A = 8B

Substitute A = 16 + B in the above expression

7(16 + B) = 8B

Open Bracket

7 * 16 + 7 * B = 8B

112 + 7B = 8B

Subtract 7B from both sides

112 + 7B - 7B = 8B - 7B

112 = B

B = 112

Recall that A = 16 + B

Hence, A = 16 + 112

A = 128

<em>This implies that Amy worked for 128 hours while Brayden worked for 112 hours</em>

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8 0
3 years ago
Find the length of AC Use that length to find the length of
Gekata [30.6K]

Answer:

1. AC = 5 cm

2. CD = 10.7 cm

Step-by-step explanation:

Looking at the left triangle, we see that AC is the side "opposite" of the angle given and AB is the "hypotenuse".

Which trigonometric ratio relates "opposite" to "hypotenuse"?

<em>Yes, that's SINE.</em>

<em />

So we can write:

Sin(30)=\frac{AC}{10}\\AC=10*Sin(30)

We know from 30-60-90 triangle, Sin(30) = 0.5, so we have:

AC=10*Sin(30)\\AC=10*0.5\\AC=5

Thus,

AC = 5 cm

Now, looking at right side triangle, we know AC, side "opposite" and we want to find CD, side "adjacent". Which trig ratio relates these 2 sides?

<em>Yes, that's tan!</em>

Thus we can write:

Tan(25)=\frac{5}{CD}\\CD=\frac{5}{Tan(25)}

Now using calculator, we get our answer to be:

CD = \frac{5}{Tan(25)}=10.7

So

CD = 10.7 cm

8 0
3 years ago
What is the surface area of the square pyramid
user100 [1]

Answer:

128 feet squared

Step-by-step explanation:

you multiply 4 by 4 to get 16 ,

then you multiply 7 by 4 and get 28,

also multiply 28 by 4 and get 112 ,

finally add 112 and 16 to get 128


6 0
3 years ago
Can someone help me with this? ;^;
zavuch27 [327]

Answer:

The mode would be 10

Step-by-step explanation:

Because it is there more than the others

hope this helps! =D

4 0
3 years ago
Read 2 more answers
Ms. Maria Wilson is considering running for mayor of Bear Gulch, Montana. Before completing the petitions, she decides to conduc
irina1246 [14]

Answer: 0.750

Step-by-step explanation:

Let p be the population proportion .

We are given that a sample of 400 voters reveals that 300 would support her in the November election.

Then the sample proportion for this situation will be :-

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Since the sample proportion is the best point estimate for the population proportion.

Therefore, the estimated value of the population proportion =0.750

8 0
3 years ago
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