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ZanzabumX [31]
3 years ago
7

HELP ME I ONLY HAVE 15 MINUTES

Mathematics
1 answer:
tia_tia [17]3 years ago
5 0

... 30, 50, 100

... 180

... 50

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the sum of 3 numbers is 9. tge second number is 3 less than the first.the thirf number is four morethan twice the first. find ea
borishaifa [10]
<h3><u>The value of the first number, x, is eual to 2.</u></h3><h3><u>The value of the second number, y, is equal to -1.</u></h3><h3><u>The value of the third number, z, is equal to 8.</u></h3>

x + y + z = 9

y = x - 3

z = 2x + 4

Because we have values for y and z, we can find the exact value of x, which we can use to find the exact values for the other variables.

x + x - 3 + 2x + 4 = 9

<em><u>Combine like terms.</u></em>

4x + 1 = 9

<em><u>Subtract 1 from both sides.</u></em>

4x = 8

<em><u>Divide both sides by 4.</u></em>

x = 2

Now that we have a value for x, we can plug this value in to each other x value to solve for y and z.

y = 2 - 3

y = -1

z = 2(2) + 4

z = 8

7 0
4 years ago
Read 2 more answers
According to the U.S. Geological Survey, there are over 300,000,000 cubic miles of water on the planet. How this number represen
Darya [45]

Answer:

3.00x10^8

Step-by-step explanation:

So you want to make sure the number before the x10^ is beween 10 and 0 not including 10 and 0. So 1.00-9.99.

Move the demcil place up in 300,000,000 till your first number is between 1 and 9.99.

Then count how many places you moved it up, in this case 8

Add the amount of times you moved up to the x10^(in this space).

you answer is now 3.00 plus the x10^8

3.00x10^8

4 0
3 years ago
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Anita put $3,000 in a savings account. The account earns an annual interest rate of 3.5%. How much interest will Anita earn afte
jek_recluse [69]
105 hope that helps and always have a great day!
8 0
4 years ago
From a point on the ground that is 120 feet from the base of a vertical tree, the angle of elevation to the top of the tree is 3
andriy [413]

Answer:

\boxed {\boxed {\sf 69.28 \ feet}}

Step-by-step explanation:

Assuming that the tree is perpendicular with the ground, we can use trigonometric ratios to find the height of the tree.

First, let's draw a diagram. From the point on the ground to the base, it is 120 feet and forms a 30 degree angle. We want to find the height of the tree, which is labeled h. (The diagram is attached and not to scale).

Next, recall the ratios.

  • sin(θ)= opposite/hypotenuse
  • cos(θ)= adjacent/hypotenuse
  • tan(θ)= opposite/adjacent

We see that the height is opposite the 30 degree angle and 120 is adjacent.

  • opposite=h
  • adjacent=120

Since we are given opposite and adjacent, we must use tangent.

tan ({\theta)=\frac{opposite}{adjacent}

Substitute the values in.

tan(30)=\frac{h}{120}

We are solving for h, so we must isolate it. It is being divided by 120 and the inverse of division is multiplication. Multiply both sides by 120.

120*tan(30)=\frac{h}{120}*120

120*tan(30)=h

120*0.5773502692=h

69.2820323=h

Round to the hundredth place (2 decimal places). The 2 in the thousandth place tells us to leave the 8 in the hundredth place.

69.28 \approx h

The height of the tree is about <u>69.28 feet.</u>

5 0
3 years ago
Ingrid walked her dog and washed her car. The time she spent walking her dog was one-fourth the time it took her to wash her car
STALIN [3.7K]
1/4 of 14 is 7/2 which is 3 1/2 which is 3.5
4 0
3 years ago
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