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3 years ago

Can anyone please helping me out with question 3 it’s my last question and I can’t get it!!!

Mathematics

1 answer:

yKpoI14uk [10]3 years ago

6 0

Answer:

x=1, y= -1

Step-by-step explanation:

x = 2y +3

3x -y = 4

Use the substitution method because we have x= something in terms of y

3 (2y+3) -y = 4

6y + 9 -y = 4 subtract 9 from both sides

6y -y = 4-9 combine like terms

5y = -5 divide both sides by 5

y = -1

x= 2*(-1) +3 = -2+3 = 1

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Two factors whose product is 84 are 12 and _[blank]_.

djyliett [7]

Answer: 7

Step-by-step explanation:

To solve this problem you must apply the proccedure shown below:

1. You know that a multiplication has the following form:

a*b=c

Where a and b are the factors and c is the product.

2. You know one of the factor, then you can find the second one as following:

12*b=84

b=84/12

b=7

Therefore the answer is 7.

7 0

3 years ago

A sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's p

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Answer:

So the value of the test statistic is -0.85.

Step-by-step explanation:

We know that a sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 54% of the chips do not fail in the first 1000 hours of their use.

We get that:

$n=1800\\\\p_1=53\%=0.53\\\\p_2=54\%=0.54\\$

We calculate the standar deviation:

$\sigma=\sqrt{\frac{0.53 \cdot (1-0.53)}{n}}=\sqrt{\frac{0.53 \cdot 0.47}{1800}}=0.01176$

We calculate the value of the test statistic:

$z=\frac{p_1-p_2}{\sigma}=\frac{0.53-0.54}{0.01176}=-0.85$

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3 years ago

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NeX [460]

Step-by-step explanation:

Statisticians use two-way tables and segmented bar charts to examine the relationship between two categorical variables.

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2 years ago

On the 1st of November 2015 there were 4200 trees planted in a wood

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Step-by-step explanation:

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2 years ago

at the souvenir shop each stuffed elephant was on sale for $5 off Matrix bought three of them for $45 how much did each stuffed

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Hello there!
So the equation I would use for this word problem is 3(s+5)=45.
3s+15=45
-15 -15
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3s=30
Divide 3 from both sides.
s ends up equaling 1.
Each stuffed animal elephant cost $10

4 0

3 years ago

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