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Rasek [7]
1 year ago
15

-2a^2+(3a-1)(a+5)-4a(a-9)

Mathematics
1 answer:
Arisa [49]1 year ago
6 0

1) Let's simplify that

-2a²+(3a-1)(a+5)-4a(a-9)​ <em>Distribute factors</em>

<em />

-2a² +3a²+15a-a-5 -4a²+36a <em>Combine like terms</em>

<em />

-3a² +50a-5

<em />

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A rectangle that is 2 inches by 3 inches has heen scaled by a factor of 7.
ahrayia [7]

Answer:

1. 14 inches and 21 inches

2.

\frac{1}{7}

Step-by-step explanation:

1.Since the rectangle has been increased by a factor of 7. Therefore

2 \times 7 = 14 \\ 3 \times 7 = 21

2. As you have increased it by a factor of 7. To reduce it, multiply by a factor of

\frac{1}{7}

3 0
3 years ago
The probabillty of winning a particular game at the 1/4 find the odds against winning the game
zmey [24]

Answer:

3/4

Step-by-step explanation:

If you have a 1/4 chance of winning, the other team has a 3/4 chance of winning assuming the only options are to win or lose. If the other team wins, you lose, so you have a 3/4 chance of losing.

4 0
4 years ago
Please tell me how to find the Slope of lines, (or do one for me) [I’ll try to help you back]
zheka24 [161]

The slope of a line often referred to as the (\frac{rise}{run}) is the rate of change in a line. It can be found using the following formula.

\frac{y_2-y_1}{x_2-x_1}

Where (x_1,y_1) and (x_2,y_2) are points on the line. For each problem, substitute the points on the line into the formula and solve for the slope.

1. \frac{1}{2}

(0, 2), (-2, 1)

=\frac{1-2}{-2-0}\\\\=\frac{-1}{-2}\\\\=\frac{1}{2}

2. 2

(-2, -1), (0, 3)

=\frac{3-(-1)}{0-(-2)}\\\\=\frac{3+1}{0+2}\\\\=\frac{4}{2}\\\\=2

3. 4

(1, 0), (2, 4)

=\frac{4-0}{2-1}\\\\=\frac{4}{1}\\\\=4

4. 1

(6, 2), (2, -2)

=\frac{-2-2}{2-6}\\\\=\frac{-4}{-4}\\\\=1

5.\frac{3}{5}

(-1, 1), (4, 4)

=\frac{4-1}{4-(-1)}\\\\=\frac{3}{4+1}\\\\=\frac{3}{5}

6. \frac{1}{3}

(-7, 4), (2, 1)

=\frac{4 -1}{2-(-7)}\\\\=\frac{3}{2+7}\\\\=\frac{3}{9}\\\\=\frac{1}{3}

7. 0

(5, -3), (-2, -3)

=\frac{-3-(-3)}{-2-5}\\\\=\frac{-3+3}{-7}\\\\=0

8. \frac{7}{5}

(-3, 2), (2, 7)

=\frac{7-2}{2 - (-3)}\\\\=\frac{7}{2+3}\\\\=\frac{7}{5}

9. 8

(2, 16), (3, 24)

=\frac{24-16}{3-2}\\\\=\frac{8}{1}\\\\=8

4 0
3 years ago
Huxian's father gives her $120 as her monthly allowance. a) If she spends an average of 5 dollars a day, find the amount on mone
abruzzese [7]

Answer:

3 days=  $105, 6 days= $90, 10 days= $70

Step-by-step explanation:

You can rewrite this equation as y=120-5x

x is the amount of days passed

plug in 3 for x and you get 15. 120-15=105

plug in 6 for x and you get 30. 120-30=90

plug in 10 for x you get 50. 120-50=70

Hope this helps!

:)

4 0
3 years ago
ADD 5y to the product of a and b.
frozen [14]

Answer:

5y+a-b

Step-by-step explanation:

3 0
3 years ago
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