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OleMash [197]
3 years ago
5

-2.3x + 4.2x = 15.01 Solve for x

Mathematics
2 answers:
Neko [114]3 years ago
6 0

-2.3x + 4.2x = 15.01         original equation

1.9x = 15.01                    combine like terms

1.9x/1.9 = 15.01/1.9        divide both sides by 1.9 to get x alone

<u>x = 7.9</u>                           simplify

CHECK YOUR WORK:

<u>plug in the solution to x into the original equation like so:</u>

-2.3(7.9) + 4.2(7.9) = 15.01        original equation w/ substitute for x

-18.17 + 33.18 = 15.01                simplify multiplication

<u>15.01 = 15.01</u>                             simplify addition

<u>When you get an answer like this, you know that the solution to x that you found is correct.</u>

VashaNatasha [74]3 years ago
4 0

Answer:

x = 7.9

Step-by-step explanation:

-2.3x + 4.2x = 15.01

combine like terms

1.9x = 15.01

divide both sides by 1.9

x = 7.9

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3 years ago
Simplify -5x(x - 3y)
jenyasd209 [6]
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3 years ago
Full steps and all reasons, thanks!​
Nataly_w [17]

You can focus on the two sub-triangles ABC and ACD

We know that they are both right triangles, because we're given that AC and BD are perpendicular.

The sides AB and AD are the hypothenuses of these triangles, so we know their length through the pythagorean theorem:

AD^2 = AC^2+CD^2

AB^2 = AC^2+BC^2

But since we're given BC=CD, the expressions for AD and AB are actually the same expression. This proves that AD=AB, and thus that the triangle is isosceles.

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3 years ago
Solve<br> y = -22t² when t = 5<br><br> If you show your work I will give you branist
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8 0
3 years ago
CAN SOMEONE PLEASE SOLVE THIS????????
defon
Which one question? there is multiple in there.
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3 years ago
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