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3 years ago

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Jeffery has grades of 93 and 81 on the first two testes of the quarter. Progress reports are sent home after the third test. He

needs an A average. What grades doe Jeffery at least have to make on the third test?

1 answer:

navik [9.2K]3 years ago

5 0

Answer:

96 or 97

Step-by-step explanation:

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Can some please answer this

Sonbull [250]

9514 1404 393

Answer:

B (2 violet)

Step-by-step explanation:

Let the colors be represented by their first letter. Then the balances give rise to two equation:

o +y +b +v = r +g +b

o +y +v = g +v

Subtracting the second equation from the first gives ...

(o +y +b +v) -(o +y +v) = (r +g +b) -(g +v)

b = r +b -v

Adding v-b to both sides, we have ...

b +(v -b) = r +b -v +(v -b)

v = r

Multiplying this result by 2, we can match the final balance:

2r = 2v . . . . . . . choice B

7 0

2 years ago

Read 2 more answers

Gnoma [55]

Answer:

sorry i thought i knew the aanswer :(

Step-by-step explanation:

6 0

3 years ago

(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

What is 2/6 in simplest form? Find the greatest common factor of 2 and 6 and divide by that number. *

nalin [4]

Answer:

$\frac{1}{3}$

Step-by-step explanation:

2 = 2 × 1

6 = 2 × 3

GCF = 2

$\frac{2 /2 }{6/2} =\frac{1}{3}$

3 0

2 years ago

Read 2 more answers

FIND THE AREA PLEASE HELP ME HURRY IM LOST ON THIS ONE

kolbaska11 [484]

The area is 126in^2
Hope this helps

8 0

3 years ago