The sum of a certain number and -5 is multiplied by 8 .the result is 2 more than the number ? In number

Mathematics

1 answer:

Bezzdna [24]3 years ago

3 0

Answer: 8(x + (-5)) = 2x

Step-by-step explanation: Lets have that "certain" number be x. We wrote an equation to represent the problem.

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Maria's book is longer than Brandon's. The difference in the two book lengths is 56

Bingel [31]

Answer:

Maria's book is 202 pages long, Brandon's book is 146 pages long

Step-by-step explanation:

We can set this up with 2 variables: lets say that Maria's book length is x and Brandon's is y.

We can see that Maria's book is 56 pages longer than Brandon's and can come up with an equation:

x=y+56

We also see that their booklengths add up to 348, and can get:

x+y=348

From here, we solve for x and y. We can use substitution to find y.

x+y=348

(y+56)+y=348

2y=292

y=146

Here we plug in for x:

x=y+56

x=(146)+56

x=202

Therefor we get that Maria's book is 202 pages long, Brandon's book is 146 pages long

7 0

2 years ago

I need help please and thank you

Dmitrij [34]

4) split this into two shapes, a rectangle and a triangle...
Rectangle: base(height)
14(7)=98
Triangle: 1/2base(height)
Find the height: 14-7=7
1/2(14)(7)=49
Add them together: 98+49=147
147in^2

5) split this into two shapes, a square and a triangle...
Square: base(height)
20(20)=400
Triangle: 1/2base(height)
1/2(20)(10)=100
Add them together: 400+100=500
500m^2

6) split this into 2 shapes, a rectangle and a triangle...
Rectangle: base(height)
6(5)=30
Triangle: 1/2base(height)
1/2(6)(3)=9
Add them together: 30+9=39
39yd^2

7) I can't see the number behind the m. Please tell me what it is and then I'll help you!

8) split this into 2 shapes, a rectangle and a triangle...
Rectangle: base(height)
5(2)=10
Triangle: 1/2base(height)
1/2(5)(3)=7.5
Add them together: 10+7.5=17.5
17.5ft^2

9) split this into 2 shapes, a rectangle and a triangle...
Rectangle: base(height)
13.5(18)=243
Triangle: 1/2base(height)
1/2(13.5)(9)=60.75
Add them together: 243+60.75=303.75
303.75cm^2

I hope this helps:)
BEST WISHES!

7 0

3 years ago

A 10 kg is moving at 2 m/s . What’s is the objects kinetic energy

Vikentia [17]

Answer:

20 joule

Step-by-step explanation:

$K. E. = \frac{1}{2} m {v}^{2} \\ = \frac{1}{2} \times 10 \times {2}^{2} \\ = \frac{1}{2} \times 10 \times 4 \\ = 20 \: j$