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Natalija [7]
3 years ago
12

From y^2+5y-7 subtract y^2-3y-4

Mathematics
2 answers:
castortr0y [4]3 years ago
8 0
y^2+5y-7-(y^2-3y-4)=y^2+5y-7-y^2+3y+4=8y-3
meriva3 years ago
6 0
Y² + 5Y - 7
Y² - 3Y - 4   _
-------------------------
= 8Y - 3
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Help 0-0-0-0-0-0-0-0-0-0-0-0-0-0
Ostrovityanka [42]

Answer:

(12,0)

Step-by-step explanation:

So whenever you are asked for an "intercept" it is the point where a line crosses the axis. The x intercept is where the line crosses at the x axis (horizontal line on the graph) and the y intercept is where the y axis crosses (vertical axis).

So this question is really asking where is the point when y = 0

The x values in the chart are 5 apart-- 22 +5 = 27, 27+ 5 = 32

The y values are 18 apart --> 36 + 18 = 54, 54+ 18 = 72

Make a little chart where y = 0 (this is where the x crosses) and you can see

there is a point at (17, 18) and then (12, 0) and that point is the x intercept.

6 0
3 years ago
Read 2 more answers
Suppose that prior to conducting a coin-flipping experiment, we suspect that the coin is fair. How many times would we have to f
STALIN [3.7K]

Answer:  b) 84

Step-by-step explanation:

Let p be the prior estimate of the required proportion.

As per given , we have

p =0.5   (The probability of getting heads on a fair coin is 0.5)

Significance level : \alpha: 1-0.90=0.10\\

Critical z-value (using z-value table ) : z_{\alpha/2}=1.645

Confidence interval width : w= 0.18

Thus , the margin of error : E=\dfrac{w}{2}=0.09

Formula to find the sample size ( if prior estimate of proportion is known.):-

n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2

Substitute the values , we get

n=0.5(1-0.5)(\dfrac{1.645}{0.09})^2

Simplify ,

n=83.5192901235\approx84  [Round of to the next whole number.]

Hence, the number of times we would have to flip the coin =<u>84</u>

hence, the correct answer is b) 84

8 0
3 years ago
A postulate is not __________.
Molodets [167]
A postulate isn't required to be proven
6 0
3 years ago
X^2 -50x+456=0 solve this algebraiclly find x
bagirrra123 [75]

Answer:

x=-406

Step-by-step explanation:

x^2-50x+456=0

x^2-50x=-456

This is because we subtract 456 from each side.

x-50=-456

We then divide the whole equation by <em>x</em> .

x=-406

Adding 50 to both sides gives us <em>x</em> by itself, hope this helps :D

8 0
2 years ago
Read 2 more answers
Find the area of a square with a side measure of 3x − 6 feet.
Wittaler [7]

Area of a square: s^2

Because we know the length of one side, we can multiply it by itself to find the area.

(3x - 6)(3x - 6)

9x^2 - 18x - 18x + 36

Combine like terms.

9x^2 - 36x + 36

<h3>The correct answer is A, or the first answer. </h3>
6 0
3 years ago
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