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3 years ago

What is the area of the composite figure? A) 27 B) 21 C) 15 D) 30

Mathematics

2 answers:

polet [3.4K]3 years ago

3 0

Answer: B 21

How?
Break it into smaller pieces
5*3= 15 (big box with out small extension)
3*2= 6 (small extension of large box. It 3 because I’m only looking for the area of the small extension)
15+6= 21

Hope this helps

OverLord2011 [107]3 years ago

3 0

Answer is b 21!!!!!!!!

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A DVD player is regularly priced at 79.95 and is on sale for 30% off. What is the discount?

evablogger [386]

Answer:

$2.40 or $77.55

Step-by-step explanation:

I don't know if you are asking for how much off or what, so I'm doing both

First, we have to find how much we have to take off or what is 30% of 79.95 so our equation is:

79.95 x 0.03 = 2.40

So 30% of 79.95 is $2.40

To find how much our new price sale is, we have to take that $2.40 off so our equation is:

79.95 - 2.4 = 77.55

So our discount price is $77.55

hope this helps:)

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3 years ago

Consider the quadratic equation x3 = 48-5. How many solutions does the equation have?

Arturiano [62]

Answer:

you would have 84-.10 I think

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Someone please help me

lawyer [7]

Part a: subtract 48-30=18
Part b: i found it by subtracting 48 -30 because it says left over

3 0

3 years ago

If f(x)=2x^2+(1000/x), find the average rate of change of f(x) from x=a to x=a+h.

galina1969 [7]

Answer:

$\frac{\frac{1000}{x+h}-\frac{1000}{x}}{h}$ is your average rate of change,

Step-by-step explanation:

average rate of change is

$\frac{f(a+h)-f(a)}{a+h-a}$ , by slope formula

simplify this to get $\frac{f(a+h)-f(a)}{h}$ , which is the definition of the derivative as h goes to 0

$\lim_{h \to 0} \frac{f(a+h)-f(a)}{h}$

since you defined x=a, we can substitute a for x and vice versa to find our derivative.

$\lim_{h \to 0} \frac{(2x^2+\frac{1000}{x+h})-(2x^2+\frac{1000}{x})}{h}$

simplifying

$\lim_{h \to 0} \frac{\frac{1000}{x+h}-\frac{1000}{x}}{h}$ (your average rate of change)

6 0

3 years ago

The difference between two numbers is 5. six times the larger number is 8 times the smaller number. write a system of equations

Ksenya-84 [330]

X - y = 5....x = 5 + y
6x = 8y

6(5 + y) = 8y
30 + 6y = 8y
30 = 8y - 6y
30 = 2y
15 = y

x - y = 5
x - 15 = 5
x = 15 + 5
x = 20

ur 2 numbers are : 20 and 15

6 0

3 years ago