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3 years ago

Number 8 please help 10 points no links pleAse

Mathematics

1 answer:

vampirchik [111]3 years ago

4 0

The answer is A (3). In the question you are given a list of numbers, these are the results from the science project. In the list, the number 12 appears 5 times, therefore 5 dots are added above the number 12 on the dot plot. 11 appears once, 13 appears 3 times, 14 appears 3 times and 15 appears three times. Hope this helps.

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Given the legs of a right triangle are a = 21, b = 28, what is the length of the hypotenuse?

Alla [95]

That's a 3 4 5 right triangle scaled by a factor of 7, so the hypotenuse must be 5 times 7.

Answer: 35

7 0

3 years ago

Andy starts with $40 and is saving at a rate of $5 per week. Samantha starts with $136 and is spending at a rate of $3 per week

My name is Ann [436]

136 - 3x = 40 +5x
136 - 40 = 5x + 3x
96 = 8x
12 = x

40 + 4(12)
40 + 48
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A.) 12 weeks
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3 years ago

Simplify these expressions

makkiz [27]

Answer:

4) 7a+20

5) 14+2b

6) 25c² - 15

Step-by-step explanation:

4) 9a+7-2a+13= 9a-2a+7+13 = 7a+20

5) 21-3b+5b-7= 21-7+5b-3b = 14+2b

6) (3c)² + (8c)² - 15 = 9c² + 16c² - 15 = 25c² - 15

8 0

2 years ago

Read 2 more answers

Which expression represents a difference of squares? A. 4x2 − 16x B. t2 + 100 C. 25k − 64 D. 81 − 49y2

LuckyWell [14K]

Answer:

I believe it would be C, not 100% sure though

7 0

3 years ago

Which graph represents the piecewise-defined function?

chubhunter [2.5K]

Answer: The correct option is 1.

Explanation:

The given piecewise function is,

$y=\begin{cases}-\frac{4}{5}x-3 & \text{ if } x$

It means if x<0, then

$f(x)=-\frac{4}{5}x-3$

If $x\geq2$ , then

$f(x)=3x-10$

Since the f(x) is defined for x<0 and $x\geq2$ , therefore the function f(x) is not defined for $0\leq x$ .

From the graph 2, 3 and 4 we can easily noticed that for each value of x there exist a unique value of y, therefore the function is defined for all values of x, which is not true according to the given piecewise function.

Only in figure the value of y not exist when x lies between 0 to 2, including 0. It means the function is not defined for $0\leq x$ , hence the first option is correct.

6 0

4 years ago