All categories

3 years ago

Luis solves the following system of equations by elimination. What is the value of s in the solution of the system? 11 33

Mathematics

2 answers:

-Dominant- [34]3 years ago

5 0

Answer:

Step-by-step explanation:

ok so this is what you would do

5s+3t=30

-1(2s+3t=-3)

which will become

5s+3t=30

-2s-3t=3

which turns into

3s = 33, s=11

devlian [24]3 years ago

3 0

Answer:

Its C on edegneuity

Step-by-step explanation:

You might be interested in

Drag the tiles to the boxes to form correct pairs. Not all tiles will be used.

Tamiku [17]

Step-by-step explanation:

(a-4) (a-5) = a^2 - 9a + 20

(a-10) (a-2) = a^2 - 12a + 20

(a-4) (a+5) = a^2 +a - 20

(a-10) (a+2) = a^2 -8a - 20

6 0

3 years ago

The time for a professor to grade an exam is normally distributed with a mean of 16.3 minutes and a standard deviation of 4.2 mi

dangina [55]

Answer:

A.0.4477

Step-by-step explanation:

Problems of normally distributed samples are 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 problem, we have that:

$\mu = 16.3, \sigma = 4.2$

What is the probability that a randomly selected exam will require between 14 and 19 minutes to grade?

This probability is the pvalue of Z when X = 19 subtracted by the pvalue of Z when X = 14. So

X = 19

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

$Z = \frac{19 - 16.3}{4.2}$

$Z = 0.64$

$Z = 0.64$ has a pvalue of 0.7389.

X = 14

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

$Z = \frac{14 - 16.3}{4.2}$

$Z = -0.55$

$Z = -0.55$ has a pvalue of 0.2912

0.7389 - 0.2912 = 0.4477

So the correct answer is:

A.0.4477

7 0

3 years ago

How many times bigger is 3.45×10⁹ than 0.5×10⁴

son4ous [18]

3449995000 is what I got, I did 3.45x10^9 and then used that number and subtracted the answer from 0.5x10^4 to get the final answer, if that makes any sense.

4 0

2 years ago

Read 2 more answers

What is the measure of ABC?

Norma-Jean [14]

Answer:

C. 60

Step-by-step explanation:

You can take away 120 instantly because that angle is acute. This leaves you with A, B, and C. It's most certainly too big to be C. By this point you can look at it and draw a 90 degree angle in your mind and you can see that it looks about 2/3 of a 90 degree angle.

May I have brainliest please? :)

3 0

3 years ago

Which of the following expressions are equivalent to –4 +(4+5)? HELP ME PLSSS

expeople1 [14]

Answer:

A C E

Step-by-step explanation:

5 0

3 years ago