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3 years ago

Whats the ordered pair 14x-2y=78 and 2x-2y=6 using the substitution method

Mathematics

1 answer:

kozerog [31]3 years ago

8 0

(6, 3) is the answer

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Factor : LaTeX: 3x^2-7x-10

Zarrin [17]

Hey there!☺

$Answer:\boxed{(3x-10)(x+1)}$

$Explanation:$

$3x^2-7x-10$

We will need to factor $3x^2-7x-10$ . In order to that, we will have to start grouping.

$(3x-10)(x+1)$

Hope this helps!

8 0

3 years ago

What is Jamal weight in kilograms if he weighs 156 pounds? Round to the nearest 10th if necessary

TEA [102]

Answer:

70.7604097 in kilograms rounded would be 70.8 kilograms

Step-by-step explanation

3 0

3 years ago

Mary and Jane both took PSY230 last semester but they were in two different sections taught by different professors. Mary's clas

Greeley [361]

Answer:

Due to the higher z-score, Jane did better in class.

Step-by-step explanation:

Z-score:

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:

Whoever's grade had the better z-score did better in class.

Mary's:

Mean of 85, standard deviation of 5, grade of 88. This means that $\mu = 85, \sigma = 5, X = 88$ . So

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

$Z = \frac{88 - 85}{5}$

$Z = 0.6$

Jane's

Mean of 80, standard deviation of 10, grade of 88. This means that $\mu = 80, \sigma = 10, X = 88$ . So

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

$Z = \frac{88 - 80}{10}$

$Z = 0.8$

Due to the higher z-score, Jane did better in class.

4 0

3 years ago

Carrie saved money to spend while on a one-month vacation to Europe. On day 8, she had $2,400 remaining. On day 16, she had $1,6

garik1379 [7]

If this is represented by a linear function, then we know that the amount of money decreases at an unchanging amount. Knowing this, and knowing that on day 8, she had 2400, we simply just add 2400 to 8 100's:

2400 + 8*100 = 2400 + 800

Carrie initially had $3200, or Option C.

6 0

3 years ago

Read 2 more answers

Can someone help me pls thanks

allsm [11]

Answer:

x = 1/2QN^2

Step-by-step explanation:

8 0

3 years ago