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2 years ago

Which is the value of y in system of equations 4x-5y=18 8x+y=58

Mathematics

1 answer:

Pie2 years ago

6 0

The answer to the question

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Subtract (-4305) from |(-2508)+(-3502)|

jeka57 [31]

answer:

10315

I used a calculator

step by step

(- 4305) - |(-2508) + (- 3502)|

Rewrite

Remove the parentheses

4305 - |

Calculate

4305 - |

- 2508 - 3502

- 6010

Calculate the absolute value

- 4305 - 6010

Calculate

Solution

- 10315

3 0

3 years ago

Answer<br> (5.2 + 6.3) - 12 ÷ 2.5

sweet [91]

Answer:

-0.2

Step-by-step explanation:

5.2 + 6.3 = 11.5

11.5 - 12 / 2.5

-0.5 / 2.5

= -0.2

5 0

2 years ago

Read 2 more answers

In a sample of 41 temperature readings taken from the freezer of a restaurant, the mean is 29.7 degrees and the population stand

yKpoI14uk [10]

Answer: $=(29.1596\text{ degrees},\ 30.2404\text{ degrees})$

Step-by-step explanation:

Given: Sample size: n = 41

Sample mean $\overline{x}= 29.7$ degrees

Population standard deviation $\sigma=2.7$ degrees

Confidence level (c) = 80% =0.80

Significance level (a) = 1- c = 1-0.80 = 0.20

z-score for 80% confidence level : z = 1.2816 [from z-table]

Confidence level for population mean :-

$\overline{x}\pm z\dfrac{\sigma}{\sqrt{n}}$

$=29.7\pm ( 1.2816)\dfrac{2.7}{\sqrt{41}}$

$=29.7\pm ( 1.2816)\dfrac{2.7}{6.403124}$

$=29.7\pm ( 1.2816)(0.42167)$

$=29.7\pm 0.5404$

$=(29.7-0.5404,\ 29.7+0.5404)$

$=(29.1596,\ 30.2404)$

Hence, 80% confidence interval for the temperatures in the freezer $=(29.1596\text{ degrees},\ 30.2404\text{ degrees})$

7 0

2 years ago

Factorise x + x - 30

matrenka [14]

Answer: 2x - 30

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Find d using a trigonometric ratio

babunello [35]

Answer: 38 is your answer hope this helped

plz make brainly

Step-by-step explanation:

6 0

2 years ago