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4 years ago

3(x-1)=2x+9 help me :(

2 answers:

7 0

3(x - 1) = 2x + 9
3x - 3 = 2x + 9
3x (-2x) -3 (+3) = 2x (-2x) + 9 (+9)
(3x -2x) = (9 + 9)
(x) = (18)
x = 18

x = 18 is your answer

hope this helps

dezoksy [38]4 years ago

7 0

Here's the way to get the answer.

1) 3x - 3 = 2x + 9
+3 +3

2) 3x = 2x + 12
-2x -2x

3) x = 12

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Ray GI bisects ∠DGH so that m∠DGI is 3x-9 and m∠IGH is 2x + 21. Find the m< DGI.

boyakko [2]

Answer:

Since GI bisects that means the angle is cut into 2 equal angles or

DGI = IGH

x - 3 = 2x - 13

Solve for x

13 - 3 = 2x - x

10 = x

x = 10

8 0

2 years ago

Read 2 more answers

What is the x in 120(2x-2)=240

coldgirl [10]

Answer:

X=2

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

120(2x−2)=240

(120)(2x)+(120)(−2)=240(Distribute)

240x+−240=240

240x−240=240

Step 2: Add 240 to both sides.

240x−240+240=240+240

240x=480

Step 3: Divide both sides by 240.

240x /240 = 480 /240

x=2

7 0

3 years ago

Colette has an exterminator visit regularly to control an ongoing cockroach problem. it's been working, and the population has d

alekssr [168]

If the initial population is 3800. Then the population of the cockroach after 3 years will be 1603.

<h3>What is exponential growth or decay function?</h3>

Consider the function:

y = a(1 ± r)ⁿ

where n is the number of times this growth/decay occurs, a = initial amount, and r = fraction by which this growth/decay occurs.

If there is a plus sign, then there is exponential growth happening by r fraction or r%.

If there is a minus sign, then there is exponential decay happening by r fraction or r%.

Colette has an exterminator visit regularly to control an ongoing cockroach problem.

It's been working, and the population has declined by 15% every year.

If the population is currently 3,800 cockroaches.

The expression is given as

y = 3800(0.75)ⁿ

Then the population of the cockroach after 3 years will be

y = 3800(0.75)³

y = 3800 x 0.4218

y = 1603.125

y ≅ 1603

Learn more about exponential growth and decay here:

brainly.com/question/2193820

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3 0

2 years ago

Should be pretty easy to answer, I just need a refresher. I forgot how to solve for triangles...

never [62]

Answer:

x = 25.734083

$x \approx 25.734$

Step-by-step explanation:

<u>Trigonometric Ratios</u>

The ratios of the sides of a right triangle are called trigonometric ratios. There are six trigonometric ratios, sine, cosine, tangent, cosecant, secant, and cotangent.

The longest side of the triangle is called the hypotenuse and the other two sides are the legs.

Selecting any of the acute angles as a reference, it has an adjacent side and an opposite side. The trigonometric ratios are defined upon those sides.

Note we are given an angle of 25°. The opposite side is 12 and the adjacent side is x. We need to relate those sides with a trig function (the tangent ratio)

Tangent Ratio:

$\displaystyle \tan\theta=\frac{\text{opposite leg}}{\text{adjacent leg}}$