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3 years ago

Which expressions are equivalent to 35+30s-45t?

Mathematics

1 answer:

Rainbow [258]3 years ago

7 0

Answer:

B and C

Step-by-step explanation:

5 * (7 + 6s - 9t) = 7*5 + 6s *5 - 9t*5

= 35 + 30s - 45t

(-35 - 30s + 45t)*(-1) = (-35)*(-1) - 30s *(-1) + 45t*(-1)

= 35 + 30s - 45t

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All zeros of the polynomial function 3x^3 + 2x^2

Softa [21]

Answer:

$x = 0, -2/3$

Step-by-step explanation:

Step 1: Factor out an x^2

$3x^3+2x^2$

$x^2(3x + 2)$

Step 2: Find the zeros

$\sqrt{x^2 } = \sqrt{0}$

$x = 0$ → Double Root

$3x + 2 - 2 = 0 - 2$

$\frac{3x}{3} = \frac{-2}{3}$

$x = -2/3$ → Single Root

Answer: $x = 0, -2/3$

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3 years ago

so far Gia has read 5/6 of a book. she has read the same numbeer of pages each day for 5 days. what fraction does Gia read EACH

UNO [17]

Answer:

1/30

Step-by-step explanation:

Gia has read 5/6 if the book so theres 1/6 left

divide 1/6 by 5 days and its 1/30

8 0

3 years ago

What is the expanded from of 309,099,990

LiRa [457]

300000000+9000000+90000+9000+900+90 is the answer

3 0

3 years ago

What is 5a-(-2a)+9 simplified

Verdich [7]

5a - (-2a) + 9

When you subtract a negative number, you can replace the 'double negative' with a positive, or addition. So, instead of subtracting -2a, you can add 2a.

5a + 2a + 9 Combine like-terms

7a + 9

3 0

3 years ago

Read 2 more answers

Question 5 (1 point)

maks197457 [2]

Answer:

228 cookies wil be rejected in a 5,000 count batch of cookies.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

$\mu = 42, \sigma = 1.5$

Proportion of rejected cookies.

Less than 39:

pvalue of Z when X = 39.

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{39 - 42}{1.5}$

$Z = -2$

$Z = -2$ has a pvalue of 0.0228.

More than 45:

1 subtracted by the pvalue of Z when X = 45.

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{45 - 42}{1.5}$

$Z = 2$

$Z = 2$ has a pvalue of 0.9772

1 - 0.9772 = 0.0228

Total:

2*0.0228 = 0.0456

How many cookies wil be rejected in a 5,000 count batch of cookies?

The proportion of cookies rejected is 0.0456. Out of 5000:

0.0456*5000 = 228

228 cookies wil be rejected in a 5,000 count batch of cookies.

6 0

4 years ago