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3 years ago

URGENT >15 POINTS< I NEED HELP ASAP

Mathematics

1 answer:

Flauer [41]3 years ago

5 0

Answer:

C. {4,6,8,12,16,18,20,24,30}

Step-by-step explanation:

I hope it helps you.

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Which number is NOT in the solution set of the inequality x>-15?

Ipatiy [6.2K]

Answer:

Step-by-step explanation:

if x has to be greater than -15 and -20 = x than its not true because -20 isn't greater than -15

5 0

3 years ago

Read 2 more answers

B. Determine the values of a and b so that f is continuous.<br><br> Please help!

wlad13 [49]

Answer:

following are the solution to this question:

Step-by-step explanation:

Please find the complete question in the attached file.

$\lim_{x\to 2}+f(x) = \lim_{x\to 2}+ (ax^2-bx+3) = 4a-2b+3\\\\ \to 4a-2b+3 = 4\\\\ \therefore \ \ 4a-2b = 1\\\\$

The one-sided limits of F(x) at x = 3 must be equivalent for f(x) to be continuous at x = 3.

$\to \lim_{x\to 3}- f(x) = \lim_{x\to 3}- (ax^2-bx+3) = 9a-3b+3\\\\ \to \lim_{x\to 3}+ f(x) = \lim_{x\to 3}+ (2x-a+b) = 6-a+b\\\\$

So,

$\to 9a-3b+3 = 6-a+b\\\\\therefore\\ \to 10a -4b = 3$

$\to 4a - 2b = 1......(a)\\\to 10a - 4b = 3.......(b)\\$

In equation a multiply the by -2 and then add in the equation b:

$\to -8a + 4b = -2\\\to 10a - 4b = 3\\ \to 2a = 1\\\\ \to a = \frac{1}{2}\\\\ \to \ 4(\frac{1}{2}) - 2b = 1\\\\ \to 2 - 2b = 1\\\\ \to -2b = -1\\\\ \to b = \frac{1}{2}$

So, the value of $a \ and \ b= \frac{1}{2}$

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3 years ago

The area of one side of a skyscraper is 90,000 square feet. The area of the corresponding side of a scale model is 200 square in

Varvara68 [4.7K]

90000 is 450 times to 200^inches (there is not width is given)

1.6inch i guess..am not sure..need to wait for more answer

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3 years ago

Which ratio is equivalent to start fraction 3 over 7 end fraction? A. 6 to 10 B. 9:21 C. start fraction 12 over 35 end fraction

olasank [31]

Answer:

B. 9 : 21

Step-by-step explanation:

Multiply numerator and denominator by 3:

... 3/7 × 3/3 = 9/21 ⇒ 9 : 21

_____

Any denominator that is not a multiple of 7 will not work. 35 is a multiple of 7 (=5×7), but 12 (=4×3) is not the same multiple of 3.

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3 years ago

Carmen spent $12.50 for a new notebook and a compass. The notebook cost $6.35 . Write and solve an equation to find c, the cost

Veseljchak [2.6K]

Answer:

C = $6.15

Step-by-step explanation:

12.50-6.35=6.15

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3 years ago