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3 years ago

Help me!!!!!!!!!!!! And look at the picture plzzzz!!!!

Mathematics

1 answer:

liubo4ka [24]3 years ago

5 0

Answer: 72

Step-by-step explanation:

Set it up as a ratio

$\frac{12}{15} =\frac{x}{90} \\15x=1080\\x=72$

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Find the mean of the following data set<br> 10,15,20,5,35,10,3

velikii [3]

Answer:

Step-by-step explanation:

add them up to get 98 then divide by 7 since there are 7 numbers

7 0

4 years ago

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A) 4230 can be divided evenly by 2, 5, and 10. How do you know?

Naily [24]

Answer:

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Step-by-step explanation:

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3 years ago

Use the four-step process to find f'(x) and then find f'(1), f'(2), and f'(3).

Soloha48 [4]

Step 1: evaluate f(x+h) and f(x)

We have

$f(x+h) = -(x+h)^2+6(x+h)-5 = -(x^2+2xh+h^2)+6x+6h-5$

$= -x^2-2xh-h^2+6x+6h-5$

And, of course,

$f(x)=-x^2+6x-5$

Step 2: evaluate f(x+h)-f(x)

$f(x+h)-f(x)=-x^2-2xh-h^2+6x+6h-5-(-x^2+6x-5)=-2xh-h^2+6h$

Step 3: evaluate (f(x+h)-f(x))/h

$\dfrac{f(x+h)-f(x)}{h}=-2x-h+6$

Step 4: evaluate the limit of step 3 as h->0

$f'(x) = \displaystyle \lim_{h\to 0} \dfrac{f(x+h)-f(x)}{h}=-2x+6$

So, we have

$f'(1) = -2\cdot 1+6 = 4,\quad f'(2) = -2\cdot 2+6 = 2,\quad f'(3) = -2\cdot 3+6 = 0$

5 0

3 years ago

Matt saves 7 dollars every week in order to buy a guitar. Write an equation, using x for the independent variable and y for the

ANEK [815]

Answer:

y = 7x

y = $133

Step-by-step explanation:

x = independent variable

y = dependent variable

y = 7x

Where,

y = total amount saved

x = number of weeks

7 = constant

When x = 19

y = 7x

y = 7 * 19

y = 133

y = $133

5 0

3 years ago

Please please help please

cricket20 [7]

Answer:

3 and 2

Step-by-step explanation:

7 0

4 years ago

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