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4 years ago

The sum of 15 and 7 times a number is 99

Mathematics

2 answers:

zalisa [80]4 years ago

8 0

Answer:

The answer is:

$15+7x=99\\x=12$

Step-by-step explanation:

In order to determine the answer, we have to know about equations.

We use equations when we have to express a problem with variables and values. In this case, we have one variable that expresses "the number" that is mentioned in the statement.

It is important to declare that there is a sequence of resolve the math operations. First it is the multiplying and then the addition.

In this case:

x="a number"

$15+7x=99\\7x=99-15\\7x=84\\x=12$

Finally, we have the following equation of the problem and its solution:

$15+7x=99\\x=12$

lesya [120]4 years ago

7 0

15+7x=99
7x=99-15
7x=84
x=12
7*12+15=99

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Answer:

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3 years ago

Which graph shows the solution to the inequality -x + 2 > 1

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-x+2+x > 1+x .... add x to both sides
2 > 1+x
x+1 < 2
x+1-1 < 2-1 ... subtract 1 from both sides
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After solving for x, we get x < 1

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If your teacher requires you to graph this on an xy grid, then draw a vertical line through 1 on the x axis. Make this vertical line a dashed line. Then shade the entire region to the left of this dashed line. Any point in this shaded region will have an x coordinate that is less than 1. The dashed line acts like the open circle. The dashed line tells the reader "any point on this dashed line is not part of the solution set"

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4 years ago

Drag each tile to the correct box. Not all tiles will be used.

german

Answer:

P=$880,I=$92.40

P=$675,I=$94.50

P=$770,I=$96.79

Step-by-step explanation:

Simple interest rate is the interest eared on principal amount only over time:

$I=PRT$

#$880 at 5.25% for 2 years

$I=PRT, P=880, R=0.0525, T=2\\\\=880\times 0.0525\times 2\\\\=92.4$

Hence, the interest earned is $92.40

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Hence, the interest earned is $94.50

#$770 at 4.19 for 3 years:

$I=PRT, P=770, R=0.0419, T=3\\\\=770\times 0.0419\times 3\\\\=96.79$

Hence, the interest earned is $96.79

4 0

3 years ago

Least to greatest 2.3 2 4/5 2.6

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2.3 is smaller than 2.6: we can see it just by looking at the digits from left to right.

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its fraction part is equal to

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do that means that 2 $\frac{4}{5}$ =2.8

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so the final order is

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5 0

3 years ago