All categories

2 years ago

Hellpp please 20 points for that

Mathematics

1 answer:

Sergio [31]2 years ago

8 0

Answer:

a) 12cm

b) 360cm²

c) 2160cm cubed

Step-by-step explanation:

you would use Pythagoras theorem for A

so half of 18 is 9

15² - 9² = 144

the square root of 144 is 12

the height is 12cm

18 x 20 = 360cm²

csa x L

csa = b x h divide by 2

18 x 12 = 216cm²/2 = 108cm²

108xm² x 20cm = 2160cm cubed

You might be interested in

A rectangle has a height of 7x^2and a width of 3x^2+ 8x + 7.

Anika [276]

Answer:

Step-by-step explanation:

8 0

2 years ago

What is the remainder of (3x^4+2x^3-x^2+2x-14)/ (x+2)

Allisa [31]

Hi,

I assume the forward slash meant it as a fraction VS it being a division symbol. To answer your question, the remainder is 10.

Hope this helps.

4 0

2 years ago

Select all of the functions that have a constant rate of change

jonny [76]

Hi,

The request actually is to choose functions whose derivative is a constant.

For A, derivative is $\dfrac{1}{2\sqrt x}$ , which is not constant.

For B, derivative is 2ˣ·ln2, which is not constant.

For C, derivative is 0, which is a constant.

For D, derivative is 1, which is a constant.

So, you can choose C and D.

Have you understood ?

Green eyes.

8 0

2 years ago

Simplify 2(x - 4) + 7(x + 2).<br><br> Step by step please

nasty-shy [4]

2(x - 4) + 7(x + 2)

mutiply the first bracket by 2

(2)(x)=2x

(2)(-4)= -8

mutiply the second bracket by 7

(7)(x)=7x

(7)(2)= 14x

2x-8+7x+14

2x+7x-8+14 ( combine like terms)

Answer:

9x+6 or 6+9x

7 0

3 years ago

Read 2 more answers

Which of the following is the equation of a line in slope-intercept form for a line with slope = 1/4 and y-intercept at (0, -1)?

NARA [144]

The answer is is D y=1/4x-1

6 0

3 years ago

Hellpp please 20 points for that​

Hellpp please 20 points for that