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Bad White [126]
3 years ago
13

−2.8+2.4+7.8−2.8I dont know how to solve this expression

Mathematics
1 answer:
Nataliya [291]3 years ago
6 0

Step-by-step explanation:

-2.8 +2.4=-.4

-.4+7.8=7.4

7.8-2.8=5

i hope this helps ; )

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Fully simplify.
Lena [83]

Answer:

9216y^2

Step-by-step explanation:

I hope this will help you

8 0
3 years ago
What is the perimeter of a 5cm cube. help i`m stuck.
belka [17]

A cube is a solid box whose every surface is a square of same area.

Take an empty box with open top in the shape of a cube whose each edge is 2 cm. Now fit cubes of edges 1 cm in it. From the figure it is clear that 8 such cubes will fit in it. So the volume of the box will be equal to the volume of 8 unit cubes together.

7 0
3 years ago
The perimeter of a rectangle is 72 in. The base is 3 times the height. Find the area of the rectangle
Dovator [93]

Answer:

243 in²

Step-by-step explanation:

Step 1. Calculate the<em> base and height </em>of the rectangle

We have two conditions:

(1)   2b+ 2h = 72 in

(2)           b = 3h               Substitute in (1)

2(3h) + 2h = 72               Remove parentheses

   6h + 2h = 72               Combine like terms

           8h = 72               Divide by 6

             h = 9 in             Substitute in(2)

             b = 3 × 9

             b = 27 in

Step 2. Calculate the area of the rectangle

A = bh

A = 27 × 9

A = 243 in²

The area of the rectangle is 243 in².

7 0
3 years ago
Which number line represents the solution set for inequality 3x&lt;-9 ?
vovikov84 [41]

<em>THE</em><em> </em><em>RIGHT</em><em> </em><em>ANSWER</em><em> </em><em>IS</em><em> </em><em>OF</em><em> </em><em>THIRD</em><em> </em><em>OPTION</em><em>.</em>

<em>HOPE</em><em> </em><em>THIS</em><em> </em><em>WILL</em><em> </em><em>HELP</em><em> </em><em>U</em><em>.</em><em>.</em><em>.</em>

5 0
3 years ago
Read 2 more answers
(3,5),slope -2<br><br> Show work
vova2212 [387]

Answer:

y=-2x+11

Step-by-step explanation:

equation of a line

y-b=m(x-a)

m=-2

a=3

b=5

sub into the equation

y-5= -2(x-3) multiply out the brackets and a negative multiply by negative equals positive

y-5=-2x+6

y=-2x+11

or

2x+y-11=0

8 0
3 years ago
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