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Usimov [2.4K]
3 years ago
12

Help me please I really don’t understand

Mathematics
1 answer:
barxatty [35]3 years ago
7 0
Number 1 is C.
Number 2 is C.
Did you need all of them?


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Which of the following choices shows y = (x − 3)^2 − 25 in standard form?
Ksivusya [100]
The answer would be x^2-6x-16

Explanation:
y=(x-3)^2 -25
(x-3)(x-3)-25
x^2-3x-3x+9-25
x^2-6x-16
6 0
2 years ago
Write the equation 2x - 3y = 6 in slope-intercept form.<br>​
ohaa [14]

Answer:

y=2/3x-2

Step-by-step explanation:

5 0
3 years ago
The table shows the weight gain of a kitten over a
stepan [7]

Answer:

The rate of change of the weight of kitten A is greater than the rate of change of the weight of kitten B

Step-by-step explanation:

  • The rate of change of the linear relationship is the slope of the line which represent this relationship
  • The rule of the slope is m = \frac{y2-y1}{x2-x1} , where (x1, y1) and (x2, y2) are 2 points on the line

∵ The table shows the weight gain of kitten A

→ Choose two points from the table to find the slope

∵ Points (0, 3) and (1, 7) are two points in the table

∴ x1 = 0 and y1 = 3

∴ x2 = 1 and y2 = 7

→ Substitute them in the rule of the slope above

∵ m = \frac{7-3}{1-0} = \frac{4}{1} = 4

∵ The slope is the rate of change

∴ The rate of change of the weight of kitten A is 4 oz/week

∵ The graph shows the weight gain of kitten B

→ Choose two points on the line to find the slope

∵ Points (0, 4) and (2, 10) lies on the line

∴ x1 = 0 and y1 = 4

∴ x2 = 2 and y2 = 10

→ Substitute them in the rule of the slope above

∵ m = \frac{10-4}{2-0} = \frac{6}{2} = 3

∵ The slope is the rate of change

∴ The rate of change of the weight of kitten B is 3 oz/week

→ By comparing the two rates

∵ The rate of change of kitten A is 4 oz per week

∵ The rate of change of kitten B is 3 oz per week

∴ The rate of change of the weight of kitten A is greater than

   the rate of change of the weight of kitten B

7 0
3 years ago
Paul plans to buy a movie that has a regular price of $19.99. It is on sale for 25% off, but Paul will have to pay 6% sales tax.
levacccp [35]

Answer:

$15.88

Step-by-step explanation:

19.99X0.25 = 4.9975

4.9975~5.00

19.99- 5.00

14.99X0.06~ 0.89

14.99+0.89

15.88

8 0
3 years ago
I have the equations 8x + 3y = 20.50 and 4x + 5y = 22.50<br> How do I solve for x and y?
snow_tiger [21]
8x + 3y = 20.50
-
4x+5y=22.50
=
4x-2y=-2, so you have to divide each number by 2, then
2x-y=-1, so

-y=-1-2x /-1, y=1+2x, then replace it with one original equation like the first one for instance:
8x+3(1+2x)=20.50, then
8x+3+6x=20.50, then
14x=20.50-3
14x=17.5
x=1.25, then solve y:\
y=1+2*(1.25)
y=1+2.5
y=3.5,
So answer is x=1.25, and y=3.5

6 0
4 years ago
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