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3 years ago

Find the y-intercept of the parabola y = x2

Mathematics

2 answers:

goldfiish [28.3K]3 years ago

7 0

Vertex is 0,0. Points are -2,4. 2,4. -1,1. 0,0 and it will look like a U

zlopas [31]3 years ago

4 0

The vertex would be (0,0) and the parabola points upward like a U. With the point (-2,4) (-1,1) (0,0) (1,1)(2,4). I hope this helps :D

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Figure A is a scale image of figure B. Figure A maps to figure B with a scale factor of 0.80. What is the value of x?

Ivan

Answer:

Step-by-step explanation:

x=5*0.8=4

5 0

3 years ago

Read 2 more answers

(a) Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the prop

zalisa [80]

Answer:

(a) The sample sizes are 6787.

(b) The sample sizes are 6666.

Step-by-step explanation:

(a)

The information provided is:

Confidence level = 98%

MOE = 0.02

n₁ = n₂ = n

$\hat p_{1} = \hat p_{2} = \hat p = 0.50\ (\text{Assume})$

Compute the sample sizes as follows:

$MOE=z_{\alpha/2}\times\sqrt{\frac{2\times\hat p(1-\hat p)}{n}$

$n=\frac{2\times\hat p(1-\hat p)\times (z_{\alpha/2})^{2}}{MOE^{2}}$

$=\frac{2\times0.50(1-0.50)\times (2.33)^{2}}{0.02^{2}}\\\\=6786.125\\\\\approx 6787$

Thus, the sample sizes are 6787.

(b)

Now it is provided that:

$\hat p_{1}=0.45\\\hat p_{2}=0.58$

Compute the sample size as follows:

$MOE=z_{\alpha/2}\times\sqrt{\frac{\hat p_{1}(1-\hat p_{1})+\hat p_{2}(1-\hat p_{2})}{n}$

$n=\frac{(z_{\alpha/2})^{2}\times [\hat p_{1}(1-\hat p_{1})+\hat p_{2}(1-\hat p_{2})]}{MOE^{2}}$

$=\frac{2.33^{2}\times [0.45(1-0.45)+0.58(1-0.58)]}{0.02^{2}}\\\\=6665.331975\\\\\approx 6666$

Thus, the sample sizes are 6666.

7 0

3 years ago

HELP! A S A P! ONLY ANSWER IF YOU'RE 100% SURE.

Sidana [21]

ANSWER

Three (3) cartons of juice

Y=3X+68.25

80=3X+68.25
Subtract 68.25 from both sides
11.75=3X

Divide

11.75/3=3.91
He can't buy a portion of a juice but he doesn't have enough to buy 4

So he can afford 3 juice cartons

6 0

3 years ago

Question 18

Viktor [21]

Answer:

the answer is b

Step-by-step explanation:

3 0

3 years ago

Could someone help me on this pleaseeee :)

shepuryov [24]

Answer:

the slope is 1, y-intercept is (0,5) hope this helps!

Step-by-step explanation:

5 0

3 years ago