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ElenaW [278]
3 years ago
15

Please I need help

Mathematics
1 answer:
GenaCL600 [577]3 years ago
7 0

Answer:

Hi! You just have to take his salary as a unity (one) and substract the fractions you are given. For example; lets say you have a cake (one) and then you eat 1/8 of it. You would be left with  1-\frac{1}8} of the original cake.

Step-by-step explanation:

Salary:     1

Spent \frac{2}{5} :     1-\frac{2}{5}

Spent \frac{1}{4}:      1-\frac{2}{5} -\frac{1}{4}

Spent \frac{1}{8}:      1-\frac{2}{5} -\frac{1}{4} -\frac{1}{8}

REMAINING: 1-\frac{2}{5} -\frac{1}{4} -\frac{1}{8}

Operate using LCM:  \frac{40-16-10-5}{40} =  \frac{9}{40}

The answer is (d)

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Use the information in the diagram to determine the height of the tree to the nearest foot.
Illusion [34]
The answer is 80 ft. 

Based on the diagram we know that the tree triangle and the building triangle are similar triangles where the lengths of each are proportional to the other. 

The lengths of the triangle the tree makes are half of the lengths of the building triangle. So this problem can be solved using ratio and proportion:

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8 0
3 years ago
Hello can you please help me posted picture of question
andrew-mc [135]
The correct option is (B): (3x+2)(3x+1)

Explanation:
Add all the boxes:
9x^2 (boxes)
9x (boxes)
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So it becomes:
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5 0
3 years ago
The length of the base of a triangle is twice its height. if the area of the triangle is 196 square​ kilometers, find the height
NISA [10]
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Answer: Height = 28km
4 0
4 years ago
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