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1 year ago

Simplify the following expression. -7x²-2+5x+13x² - 15x

Mathematics

1 answer:

andreev551 [17]1 year ago

8 0

Answer: 2(3x^2-5x-1) or 6x^2-10x-2

Step-by-step explanation: combine like terms, and then factor by grouping :)

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Solve the equation<br> -5.1 + 8 = -7

photoshop1234 [79]

Answer: 2.9 ≠ −7 (False)

Step-by-step explanation:

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3 years ago

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3(5+3)^2 +14<br><br><br> help me pls i cannot deal w my parents again

Scilla [17]

Answer:

206

Step-by-step explanation:

I put it in a calculator

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3 years ago

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Is (1, 3) a solution to the system of equations listed below? (1 point) y= 6x -3 y = x - 2

ololo11 [35]

Answer:

The solution for given system of equation is: $x=\frac{1}{5}\:and\:y=\frac{-9}{5}$ and ordered pair is: $\mathbf{(\frac{1}{5},\frac{-9}{5})}$

So, (1,3) is not solution to the given system of equations.

Step-by-step explanation:

we can solve the system of equations to find the value of x and y and then verify if (1,3) is a solution or not.

The system of equation given is:

$y=6x-3\\y=x-2$

Solving:

Let:

$y=6x-3--eq(1)\\y=x-2--eq(2)$

Put value of y from equation 2 into equation 1

$y=6x-3\\Put\:y=x-2\\x-2=6x-3\\x-6x=-3+2\\-5x=-1\\x=\frac{-1}{-5}\\x=\frac{1}{5}$

Now, put value of x in equation 2 to find value of y

$y=x-2\\Put\:x=\frac{1}{5} \\y=\frac{1}{5} -2\\y=\frac{1-2*5}{5} \\y=\frac{1-10}{5}\\ y=\frac{-9}{5}$

So, the solution for given system of equation is: $x=\frac{1}{5}\:and\:y=\frac{-9}{5}$ and ordered pair is: $\mathbf{(\frac{1}{5},\frac{-9}{5})}$

So, (1,3) is not solution to the given system of equations.

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3 years ago

Can someone help me find the volume of the sphere

uysha [10]

$\text {Volume = } \dfrac{4}{3} \pi r^3$

$\text {Volume = } \dfrac{4}{3} \times 3.14 \times (2)^3$

$\text {Volume = } 33.49 \ unit^3 \text {(nearest hundredth) }$

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3 years ago

a man has a garden measuring 84 metre by 56 he want to divide them equally into the minimum number of square plot what is the le

maw [93]

Answer:

Step-by-step explanation:

84 = 3 x 28

56 = 2 x 28

Minimum number of square plot, each square is 28 x 28

the number is 3 x 2 = 6

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2 years ago

Simplify the following expression. -7x²-2+5x+13x² - 15x​

Simplify the following expression. -7x²-2+5x+13x² - 15x