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2 years ago

I think of a number, double it, and subtract two. I get nine.

Mathematics

2 answers:

solniwko [45]2 years ago

8 0

Answer:

$2(x) - 2 = 9 \\ 2x - 2 = 9 \\ 2x = 9 + 2 \\ 2x = 11 \\ x = \frac{11}{2} \\ x = 5 \frac{1}{2}$

Leto [7]2 years ago

6 0

Answer:

a) 2x - 2 = 9

b) x = 5.5

Step-by-step explanation:

I think of a number

→ Lets call that number "x"

double it

→ 2x

and subtract two

→ 2x - 2

I get nine

→ 2x - 2 = 9

In an equation our aim is to make "x" the subject and solve it to find the value of x. But we must also remember that if we do something to one side then it will happen to the other side as well. If we took away 2 from x we would have to do it to the 9 as well so

2x - 2 = 9

→ Subtract 2 from both sides to isolate 2x

2x = 11

→ Divide both sides by 2 to isolate x

x = 5.5

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Find the slope of the line.

lawyer [7]

Answer:

Step-by-step explanation:

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2 years ago

Help its lateee and i suck at this

s2008m [1.1K]

Answer:

1. Identify the problem: Packaging boxes use too much material and create waste

2. What are the equations for the volume and surface area of a cube and rectangular prism?

Volume of a cube: Vcube = L x L x L = L3

Surface area of a cube: SAcube = 6 x (L x L) = 6L2

Volume of a rectangular prism: VRP = L x W x H = LWH

Surface area of a rectangular prism: SARP = 2 x (L x W) + 2 x (L x H) + 2 x (W x H) = 2(LW + LH + WH)

3. What is the difference in surface area of the packages below? (Note that they have the same volume.)

SAcube = 6L2

= 6 (20 cm)2

= 2,400 cm2

SARP = 2(LW + LH + WH) = 2 (20cm x 10cm + 20cm x 40cm + 10cm x 40cm) = 2,800 cm2

SARP – SAcube = 2,800 cm2

– 2,400cm2

= 400 cm

Step-by-step explanation:

everything in bold is the answer

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2 years ago

What is 575% written as a mixed number?

pav-90 [236]

Answer:

575% as a mixed number is $5\frac{3}{4}$

Explanation:

575% is equivalent to $\frac{575}{100}$ which is equal to 5.75

5.75 = 5 + 0.75

0.75 can be written as $\frac{75}{100}$ . This value can be simplified by dividing both the numerator and the denominator by 25. This would give us $\frac{3}{4}$