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Masja [62]
3 years ago
7

Charlie solved an equation, as shown below:

Mathematics
1 answer:
Alex73 [517]3 years ago
6 0
Part A:  Charlie's answer is incorrect
In step 2 of Charlie's answer he subtracted 5 from each side.  Since 5x is multiplication, he must DIVIDE each side by 5 to get x by itself.  The problem should have worked out like this...

Step 1:  5x = 30
Step 2:  x = 30/5
Step 3:  x = 6

Part B:  There is only 1 solution for this problem.
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2x+3y=53<br> 3x-y=19<br> find the values of x and y
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Answer:

x = 10.

y = 11

Step-by-step explanation:

2x+3y=53

3x-y=19

x = 10; y = 11

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2 years ago
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A painter can paint 350 square feet in 1.25 hours. What is the painting rate in square feet per hour?
blsea [12.9K]
Well we know that he can paint 350 square feet in 1.25 hours. To find how much he can paint in 1 hour, we would divide 350 by 1.25. 350 divided by 1.25 = 280, therefore his painting rate is 280 square feet per hour.
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You are preparing a case study on the dallas cowboys. You use many methods of data collection in creating the case study. Here i
stepladder [879]

Answer:

The information that was collected by each of the four methods is;

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Step-by-step explanation:

For each of the four methods listed, the question that stood out was the favorite coach of the Dallas Cowboys among the participants in the study.

Questionnaire: one of the questions was, who is your favorite coach of the Dallas cowboys?

Interview: I asked him which coach was his favorite

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5 0
3 years ago
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juin [17]

Answer:

19.4 feet

Step-by-step explanation:

Since the triangle has a right angle( as one of the angles in it is equal to 90°), we may find the length of the unknown side using the trigonometric notations SOH CAH TOA where

SOA stands for

Sin Ф = opposite side/hypotenuses side

Cosine Ф = adjacent side/hypotenuses side

Tangent Ф = opposite side/adjacent side

Given that the measure of ∠G=90° and  ∠E=40°

EF is the hypotenuse side

FG is the opposite side and

GE is the adjacent side. As such if EF = 75 feet

Cos 75 = GE/75

GE = 75 Cos 75°

= 19.41 feet

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3 years ago
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