All categories

2 years ago

Help me, I got the answer 4 but I’m not positive on it

Mathematics

1 answer:

Andrei [34K]2 years ago

4 0

Answer:

Step-by-step explanation:

DE+DF=8x

DE+DF=32

8x=32

X=4

Since there is 5x in DE

5(4)=20

You might be interested in

(EASY MULTIPLE CHOICE I BEG YOU)

iogann1982 [59]

1) its number 2. 30x^7y^4

8 0

2 years ago

F divided by -2/3 = -1/3 solve for f

nadya68 [22]

$f \div \frac{ - 2}{3} = \frac{ - 1}{3} \\ \\ f = \frac{ - 1}{3} \times \frac{ - 2}{3} \\ \\ \boxed{ \red{f = \frac{2}{9} }}$

3 0

3 years ago

B) The number of volume of a cylinder is half of its number of the total surface area.

faust18 [17]

Answer:

$V=179.6cm^3$

Step-by-step explanation:

the volume of a cylinder is given by:

$V=\pi r^2h$

where r is the radius and h is the height.

and the surface area:

$SA=2\pi r^2+2\pi rh$

the first term is the area of the circles and the second term is the area of the body.

since "The number of volume of a cylinder is half of its number of the total surface area." we will have that:

$V=\frac{1}{2}SA$

substitutig the equivalent expressions on each side:

$\pi r^2 h = \frac{1}{2} (2\pi r^2+2\pi r h)$

and we simplify and solve for the height (since is the value we don't know of the cylinder):

$\pi r^2 h = \pi r^2+\pi r h\\\pi r^2h-\pi rh=\pi r^2\\h(\pi r^2-\pi r)=\pi r^2\\h=\pi r^2/(\pi r^2-\pi r)$

we substitute the value of the radius $r=7cm$ , and we get:

$h=\pi (7cm)^2/(\pi (7cm)^2-\pi (7cm))\\h=153.938/(153.938-21.991)\\h=153.938/131.947\\h=1.1666cm$

thus the volume is:

$V=\pi r^2h$

$V=\pi (7cm)^2(1.1666cm)\\V=179.6cm^3$

3 0

2 years ago

Read 2 more answers

2 show by calculation of nature of triangle AMK<br>3 CULCULATE BP MK AK

GarryVolchara [31]

Answer:

if he is the to form a 666

Step-by-step explanation:

what

want to

story

about

6 0

2 years ago

Is there a trend in this data if there is please tell me and why ,thank u

pickupchik [31]

No thers not a trend because a trend need to be in a strait line and thers not a strait line in the photo

5 0

3 years ago

Read 2 more answers