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Ainat [17]
3 years ago
7

5x + 3(x + 4) = 7x +12 + x +

Mathematics
2 answers:
Evgen [1.6K]3 years ago
8 0
3x+4-7x=12

We simplify the equation to the form, which is simple to understand
3x+4-7x=12

We move all terms containing x to the left and all other terms to the right.
+3x-7x=+12-4

We simplify left and right side of the equation.
-4x=+8

We divide both sides of the equation by -4 to get x.
x=-2
koban [17]3 years ago
7 0

Answer:

All real numbers are solutions.

Step-by-step explanation:

5x + 3(x + 4) = 7x +12 + x

All real numbers are solutions.

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What will the last payment be to pay off a $1,250 computer plus 8% sales tax with monthly payments of $120?
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Convert 8% too decimal form = 8/100 = .08
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divide both sides by 120
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2 years ago
xand y are light house. y being 20km due east of x and from a ship due south of x the bearing of y was 055°. what is the distanc
leonid [27]

Answer:

I) |xz| ≈ 28.6 km

II) |yz| ≈ 34.8 km

Step-by-step explanation:

Let's assume that the position of ship due south of x is z (aà pictor representation of the question is attached)

|xy| = 20 km, |xz| = ?, |yz| = ?, θ(y) = 55°

Using Trigonometric ratio - SOHCAHTOA

I) Tan θ = |xz| ÷ |xy| ⇒ Tan 55° = |xz| ÷ 20

|xz| = 20 * Tan 55 = 20 * 1.428

|xz| = 28.56 km

|xz| ≈ <u>28.6 km</u>

<u />

II) Cos θ = |xy| ÷ |yz| ⇒ Cos 55° = 20 ÷ |yz|

|yz| * Cos 55° = 20 ⇒ |yz| = 20 ÷ Cos 55°

|yz| = 20 ÷ 0.574 = 34.84 km

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