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Anarel [89]
3 years ago
5

9(1 – 2x) = 3(x + 1)

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
5 0

Answer:

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

9 - 18x = 3x + 3

9+9-18x = 3x + 3 + 9

-18x = 3x +11

-18x -3x = 3x - 3x + 11

-21x= 11

-21x/-21 = 11/-21

x = 11/-21

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Find the sum of the sequence 31+32+33+34...+94
Nana76 [90]

Answer:

4000

Step-by-step explanation:

6 0
3 years ago
How does it factor out as that?
eimsori [14]
To factor out you have to think what multiples to AC and adds to B.

Ax^2+Bx+C

So... for this problem AxC=1x-24 or -24

B is -2.

So what two numbers multiply to -24: -3x8, -8x3, -4x6, -6x4, -2x12, -12x2.

Out of these, which adds to -2: -6+4=-2.

So the factors are (d-6)(d+4)

OR the longer way, which you really only use if A is not equal to 1.

Use the terms above and then rewrite the equation with two middle terms: d^2+4d-6d-24

Group the terms by using addition: (d^2+4d)+(6d-24)

Find what they have in common and factor it out. For the first, it's d. They both have d. So: d(d+4)
To check this, distribute the d. It should equal the first set lf parenthesis.

For the second, they have a number in common. 6 is a multiple of 24 so you can take that out: -6(d+4)

If the terms inside the parenthesis are the same, that's good. It means we can pair the insides and the outsides together to form the factors.

The two terms outside the parenthesis: d, -6 group together and become (d-6)

The inside terms stay the same: (d+4)

(d-6)(d+4)

Again, this is the longer way and no necessary for a problem like this. But if it was 2d^2, then this would be perfecf.




6 0
3 years ago
Sandy pays $120 for 4 violin lessons. How much does she pay for 10 violin lessons?
monitta

Answer:

300$

Step-by-step explanation:

divide 120 by 4 and then mutiply the answer on that by 10

7 0
3 years ago
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Answer:

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Step-by-step explanation:

The formula for the area of a triangle of base b and height h is:

A = (1/2)(b)(h)

Here, that area is   A = (1/2)(8)(14) = 56 square units

4 0
3 years ago
Which of the following is approximately equal to the expression below
mote1985 [20]

Answer:

D

Step-by-step explanation:

11/3 x 6/7 x 131/13 =

8646/273 =

31.7

3 0
3 years ago
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