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DaniilM [7]
3 years ago
15

4(x)+6+3+7=17 what does x equal

Mathematics
1 answer:
levacccp [35]3 years ago
7 0

Multiply the bracket by 4

4(x)+6+3+7= 17

4x+6+10=17

4x+16= 17

4x+16-16= 17-16

4x= 1

divide by 4 for 4x and 1

4x/4= 1/4

x= 1/4 or in decimal form , x= 0.25

Check answers by using substitution method:

4(1/4)+6+3+7= 17

1+9+7= 17

17= 17

Answers can be x= 1/4 or x= 0.25

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An angle measures 48.4° less than the measure of its complementary angle. What is the measure of each angle?
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Answer:

The angles are 69.2 degrees and 20.8 degrees

Step-by-step explanation:

Complementary angles, when added together, = 90°

We’ll call the first unknown angle a and the second angle b

b = a - 48.4

a + b = 90

So let’s substitute in for b in the second equation:

a + a - 48.4 = 90

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69.2 - 48.4 = 20.8 = b

Now, does a + b = 90?

69.2 + 20.8 = 90

Lmk if you have questions

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Last year the depth of the river was 4.2 feet deep. This year it dropped 25%. Find the depth of the river this year to cross it.
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Answer:

The river is 3.15 feet deep.

Step-by-step explanation:

First let's recognize what we need to find: the depth of the river

We know last year the river was 4.2 feet deep, but it dropped 25%. This means we also need to find how much it dropped. To find this, we need to know what 25% of 4.2 is. Write an equation for this.

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Answer:

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Step-by-step explanation:

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