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dangina [55]
3 years ago
9

The difference between two numbers is 8. Twice the number is 4 more than the larger number. What is the smaller number?

Mathematics
1 answer:
Neko [114]3 years ago
4 0

Answer:

If the two numbers are x and y, then:

x + y = 8

18 - 2x = 4y - 2.

When we subtract y from both sides in our first equation we get:

x = 8 - y, so:

18 - 2(8 - y) = 4y - 2

18 - 16 + 2y = 4y - 2

2 + 2y = 4y - 2

2y = 4

y = 2

Since x + y = 8, and y = 2, x = 6, and since 6 > 2, the larger number is 6.

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Answer:

Step-by-step explanation:

The formula for determining confidence interval is expressed as

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a) The 95​% confidence level has a z value of 1.96

The 99​% confidence level has a z value of 2.58

Since 99​% confidence level z value is greater than 95​% confidence level z value, if we input it into the formula, it will result to a higher confidence interval. So changing from a 95​% confidence level to a 99​% confidence level would make a confidence interval wider.

b) The √15 is smaller than the √350. This means that if we make use of the formula, √350 will give a lower confidence interval than that of √15. Therefore, the confidence interval would be narrower changing from a sample size of 15 to a sample size of 350.

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3 0
3 years ago
PLEASE HELP AND SHOW WORK I RLLY NEED TO PASS
Alex787 [66]

40×4×4=640

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using formula:

1/2×base×height

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its says scale by factor 4:

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1/2×base×height

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3 years ago
How do you solve 8x-3y=-70 and -2x+5y=-8 using the elimination method please show work.
lora16 [44]

Answer:

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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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1 route: a=1.               one factorial (1!) =1*1=1

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4 routes: 4!=1*2*3*4=24

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2 years ago
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