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4 years ago

What is b? -17+b/8:13

Mathematics

1 answer:

tester [92]4 years ago

6 0

Regroup terms

b/8 - 17 = 13

Add 17 to both sides

b/8 = 13 + 17

Simplify 13 + 17 to 30

b/8 = 30

Multiply both sides by 8

b = 30 × 8

Simplify 30 × 8 to 240

b = 240

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A traffic helicopter descends 153 meters to be 445 meters above the ground, as illustrated in the

sertanlavr [38]

Answer:

598 meters

Step-by-step explanation:

In the problem, the word 'decend' means to decrease in elevation.

Our equation:

$? - 153 = 445$

Add 153 to both sides of the equation:

$?= 598$

598 meters represents the original height of the helicopter.

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2 years ago

8.46 If 100 is decreased by a% and the result is decreased by b%, then what is the total percent decrease (in terms of a and b)?

Marysya12 [62]

Answer:

The total percent decrease is $a+b-\frac{a b}{100}$

Step-by-step explanation:

We are given with a word problem
We are asked to find the total percentage decrease
We can do this in two steps

Step 1: Finding the two percentage decrease

Step 2: Finding their difference

Step 1 of 2

Let the decrease by a% be 100-a

Then b% decrease is

$\begin{aligned}\frac{b}{100} \times(100-a) &=\frac{100 b-a b}{100} \\\frac{100 b}{100}-\frac{a b}{100} &=b-\frac{a b}{100}\end{aligned}$

Step 2 of 2

The percentage difference between the two percentages is,

$\begin{aligned}&(100-a)-\left(b-\frac{a b}{100}\right)=100-a-b+\frac{a b}{100} \\&100-a-b+\frac{a b}{100}=100-\left(a+b-\frac{a b}{100}\right)\end{aligned}$

Since 100 is the total percent $a+b-\frac{a b}{100}$ is the percentage decrease.

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2 years ago

On a math test, do a first pass through the test and solve all of the problems you can do easily.

Tomtit [17]

Yes teachers say to do that all the time it helps you

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4 years ago

⚠️What is the slope of the line that passes through the points ( 4,9 ) and ( 14, 17)⚠️

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The answer is m=4/5 so the slope of the line is 4/5

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3 years ago

I got 30 will someone double check me please.

Tpy6a [65]

That’s the correct answer

4 0

3 years ago

Read 2 more answers