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gogolik [260]
3 years ago
9

Adriel answered 54 questions correctly on his multiple choice history final and earned a grade of 45%. How many total questions

were on the final exam?
Mathematics
1 answer:
alex41 [277]3 years ago
8 0

Answer:

There were 120 questions on the test.

Step-by-step explanation:

It is given that:

Number of questions answered = 54

Grade percent = 45%

Let,

x be the total number of questions

45% of x = 54

\frac{45}{100}x=54\\0.45x = 54

Dividing both sides by 0.45

\frac{0.45x}{0.45}=\frac{54}{0.45}\\x=120

Therefore,

There were 120 questions on the test.

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Mike and Krista rent a jet ski while on vacation. The rental cost is represented by the function c(h)=50+20h, where the number o
Step2247 [10]

Answer:

130

Step-by-step explanation:

Given the equation of the relation as c(h) =50 +20 h where c(h) is the total cost for h hours and h is the number of hours of use, then to find the cost of jet ski if 4 hours were used will be;

c(h)=50 +20 h

c(4)=50 +20*4

c(4)=50 +80

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5 0
3 years ago
Can you help me on this one please
Vera_Pavlovna [14]
Answer: x ≥ 1307

Explanation:

First, write the formula:
monthly fee: $14
minute rate: 7¢ or $0.07
total charge: $105.49
.07x + 14 ≥ 105.49  (the sign is this way because they said this price was the least she had been charged for a month. 
You can solve for x just like you would in an equation by making the ≥ sign an equal sign
.07x + 14 = 105.49 
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.07x = 91.49
÷ .07     ÷ .07
x = 1307 minutes 
since you didn't divide by a negative number, the inequality sign stays the same:
x ≥ 1307
8 0
4 years ago
Select the values of xxx that make the inequality true. x>\dfrac 12x> 2 1 ​ x, is greater than, start fraction, 1, divided
masha68 [24]

Answer:

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A. 2⅓

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D. 1

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Options C and E are negative numbers and are therefore less than the positive number ½.

Option B(i.e. 0) is also less than ½ or 0.5 and therefore do not satisfy the inequality given.

Options A and D are greater than ½ and therefore satisfies the inequality given.

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