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KengaRu [80]
3 years ago
6

9x + 9 + 2x - 7(3 + x) =

Mathematics
1 answer:
SashulF [63]3 years ago
4 0

Answer:

4x-12 or 4(x-3)

Step-by-step explanation:

9x+9+2x-7(3+x)

9x+2x+9-21-7x

11x-12-7x

11x-7x-12

4x-12

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Which is the equation of the parabola?
mestny [16]

Answer:

  • y = -1/20(x + 3)²

Step-by-step explanation:

<u>Consider the parent function:</u>

  • y = x²

The graph of the function open up and the vertex is at the origin, the point (0, 0)

Now, if it opens down, it means it is a reflection of the parent function over x axis, hence it has a negative coefficient, the function becomes:

  • y = -x²

The vertex is shifted to the point (-3, 0). It means the function also translated left by 3 units, the function becomes:

  • y = -(x + 3)²

<u>Since all the options have 1/20 as a coefficient, our function is:</u>

  • y = -1/20(x + 3)²

This is option B

6 0
3 years ago
An urn contains 17 white balls and 18 red balls. A sample of four balls is selected at random from the urn. What is the probabil
erik [133]

Answer:

c. 0.3974

Step-by-step explanation:

Given;

number of white balls, W = 17

number of red balls, R = 18

Total number of balls, T = 35

The number of ways the event will occur is given by

= P(2 whites) and P(2 reds)

= P(2whites) x P(2 reds)

= 17C2 x 18C2

= 136 x 153

= 20,808

The total number of possible outcome

= 35C4

= 52,360

The probability = 20,808 / 52,360

                          = 0.3974

The correct option is "C"

6 0
3 years ago
An electrical shop reduces display goods by 20%. A display TV is sold for £200. What is the usual price of the same TV?
Fynjy0 [20]
200 is 80%
200 / 80 = 2.50 (1%)
2.50 * 100 = £250

Hope this helps.
8 0
3 years ago
Order the numbers from least to greatest.<br> 54%, 2/5, -0.45<br><br> SHOW YOUR WORK!
Tom [10]

Answer:

-0.45, 2/5, 54%

Step-by-step explanation:

54%=54/100

=87/50

2/5=20/50

-0.45 must be the smallest as it is negative

7 0
2 years ago
Turn -2x+4y=0 into slope-intercept form
yanalaym [24]
Y=1/2x +0. You add the 2x to the other side, and then divide everything by 4 to have only 1y.
3 0
3 years ago
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