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3 years ago

Which expression is equivalent to -3x(x-4)-2x(x+3)?

Mathematics

2 answers:

kvv77 [185]3 years ago

6 0

Answer

=5x²+12x-6

Step-by-step explanation:

you multiply -3x(x-4)-2x(x+3)

=-3x²+12x-2x²-6

group like terms

=-3x²-2x²+12x-6

=-5x²+12x-6

Ymorist [56]3 years ago

4 0

Answer:

x(x^2 + 6)

Step-by-step explanation:

We are to simplify -3x(x-4)-2x(x+3). Begin by performing the indicated multiplication. We get -3x^2 + 12x - 2x^2 - 6x.

Combining like terms, we get -5x^2 + 6x, which is equivalent to

x(x^2 + 6)

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3 years ago

What is the solution to the equation 2^x+4 -12=20? A. x=0 B. x=1 C. x=2 D. x=9

seropon [69]

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3 years ago

Read 2 more answers

Slav-nsk [51]

Let k be the scale factor relating two similar prisms $P_{1}$ and $P_{2}$ , such that for corresponding parts of prisms $P_{1}$ and $P_{2}$ (for heights, in particular) we have $k= \frac{height\ of \ P_{1} }{height \ of\ P_{2} }$ . In our case $k= \frac{4}{10} = \frac{2}{5}$ .
For surfaces area we have $\frac{Surface \ area \ of \ P_{1} }{Surface \ area \ of \ P_{2}} = k^{2} =( \frac{2}{5} )^{2}= \frac{4}{25}$ .
So, the right answer is 4:25 (choice B)

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3 years ago

Solve for x and then part b) find JL. Have no clue how to go about this

Igoryamba

9514 1404 393

Answer:

x = 4
JL = 16

Step-by-step explanation:

a) You go about this by using the given equation.

Left + Right = Total

JK + KL = JL

(2x -3) + 11 = 4x

8 = 2x . . . . . simplify, subtract 2x

4 = x . . . . . . divide by 2

b) JL = 4x = 4·4

JL = 16

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2 years ago

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