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Yuki888 [10]
3 years ago
5

3.9x + 1.4 = 17 what is the steps​

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
6 0

Answer:

x=4

Step-by-step explanation:

3.9x + 1.4 = 17

Having a decimal is not very nice to deal with, so we multiply all sides by 10 to get rid of the decimals.

3.9x*10+1.4*10=17*10

39x+14=170

Subtract 14 from both sides:

39x+14-14=170-14

39x=156

Divide both sides by 39:

\frac{39x}{39}=\frac{156}{39}

x=4

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Two complementary angles are in the ratio 7:8. What is the measure of the larger angle?
yan [13]

Answer

<h3>48°</h3>

Step-by-step explanation:

We know that sum of complementary angle adds to 90°

Let the angles be 7x and 8x

<u>First </u><u>of </u><u>all,</u><u> </u><u>finding </u><u>the </u><u>value </u><u>of </u><u>x</u>

\sf{7x + 8x = 90 °}

Collect like terms

⇒\sf{15x = 90 °}

Divide both sides of the equation by 15

⇒\sf{ \frac{15x}{15}  =  \frac{90}{15} }

Calculate

⇒\sf{x = 6 °}

The value of X is 6°

<u>Now,</u><u> </u><u>substituting </u><u>/</u><u> </u><u>Replacing</u><u> </u><u>the </u><u>value </u><u>of </u><u>x</u>

⇒\sf{7x = 7 \times  6 = 42}

⇒\sf{8x = 8 \times 6 = 48}

The measure of larger angle is 48°

Hope I helped!

Best regards!!

5 0
3 years ago
If 3 times a number minus 2 equals 13, what is the number? <br> A. 5 <br> B. 2 <br> C. –6 <br> D. 4
Ivenika [448]
3x - 2 = 13

Add 2 on both sides

3x - 2 + 2 = 13 + 2
3x = 13 + 2
3x = 15

Divide both sides by 3.

3x/3 = 15/3

x = 15/3

x = 5

Your final answer is A. 5.
4 0
3 years ago
What is the value of t in the equation 2t-8+4t-13=27
MAVERICK [17]

Answer:

t=8

Step-by-step explanation:

7 0
3 years ago
Find the height of the triangle.
Paladinen [302]
Use the sine function here.

 x
--- = sin 20 degrees  = 0.349, so x = 10(0.349) = 3.42
10
3 0
3 years ago
Read 2 more answers
. Loraine had some flour in a jar. She made one batch of muffins that used 4 ¼ cups of flour. She now has 7 ¾ cups of flour left
zaharov [31]

Answer:

12 cups

Step-by-step explanation:

lets break it up, 7+4 = 11 and 3/4 + 1/4 = 1 and 11 + 1 = 12, so the answer is 12.

6 0
3 years ago
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