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xxMikexx [17]
3 years ago
6

Math problem I need help giving brainlist

Mathematics
2 answers:
Gwar [14]3 years ago
6 0

Answer:

it should be the first one -28

Step-by-step explanation:

7(8-x)=-5x

distribute the 7 to 8 and -x

56-7x=-5x

then you add 7x to both sides

56=-2x

lastly you divide both sides by -2

-28 = x

hope this helps

Liono4ka [1.6K]3 years ago
3 0

Answer:

x = 28

Step-by-step explanation:

7(8 - x) = -5x

56 - 7x = -5x                 Distribute 7 to the parenthesis

56 = 2x                         Add -7x to both sides

28 = x                           Divide 2 to both sides

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Guys, please help me out.
snow_tiger [21]

Answer:

The answer is A. 0<-3

5 0
3 years ago
Read 2 more answers
A tank is full of oil weighing 30 lb/ft3. The tank is an inverted right rectangular pyramid (with the base at the top) with a wi
Gwar [14]

Answer:

Step-by-step explanation:

density of oil, d = 30 lb/ft³

Volume of tank, V = l x w x h = 1 x 2 x 1 = 2 ft³

mass of oil, m = Volume x density of oil = 1 x 30 = 30 lb

Work = m x g x h = 30 x 32 x 3 = 2880 units

5 0
4 years ago
A solid shape is made by joining two cones. Each cone has the same radius. One cone has The other cone has slant height = 2x rad
pshichka [43]

The given area of the shape of 57.8·π cm², and length of the slant sides

being a factor of the radius, gives the length of the radius as <u>3.4 cm</u>.

<h3>How can the length of the radius be calculated?</h3>

Given;

Radius of the two cones are equal.

Slant height of one cone = 2 × Radius

Slant height of the other cone = 3 × Radius

Surface area of the shape = 57.8·π cm²

The curved surface area of a cone = π·r·l

Required:

The radius of the cone.

Solution;

Surface areas of the cones are therefore;

π·r × 2·r, and π·r × 3·r

The total surface area is therefore;

π·r × 2·r + π·r × 3·r = 57.8·π

5·r²·π = 57.8·π

Which gives;

r² = 57.8 ÷ 5 = 11.56

r = √(11.56) = 3.4

  • The radius of the cones, r =<u> 3.4 cm</u>

Learn more about finding the surface area of 3-D shapes here:

brainly.com/question/15635229

8 0
2 years ago
I need help on this I don’t get this
insens350 [35]
First you find 2 points so (-7,-2) and (-9,2) find the slope by starting from the LEFT point and go down so it is equal level to the right point. Once you do that count to the right and get that number to get the slope in this case it is 2/4x or 1/2x no find the y intercept which is where in meets the y axis which is -8 now you have the answer y= 1/2x + -8 make sure to use the formula y= Mx + b to make it easier. Hope this helped!
3 0
3 years ago
The ocean surface is at 0 ft elevation. A diver is underwater at a depth of 138 ft. In this area, the ocean floor has a depth of
crimeas [40]

Answer:

The ocean surface is at 0 ft elevation. A diver is underwater at a depth of 138 ft. In this area, the ocean floor has a depth of 247 ft.

Step-by-step explanation:

6 0
3 years ago
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