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Mrac [35]
3 years ago
9

Twenty more than half a number is 70. What is the number

Mathematics
2 answers:
astraxan [27]3 years ago
5 0

Answer:

100

Step-by-step explanation:

we start by subtracting 20 from 70, which is 50

we double 50 to get 100

levacccp [35]3 years ago
4 0

Answer:

n =  100

Step-by-step explanation:

20 + 1/2n = 70

subtract 20 from both sides

1/2n = 50

multiply both sides by the reciprocal of 1/2 which is 2

n = 100

hope this helps

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Which of the two solids below are similar ?
Pachacha [2.7K]

Answer:  I and II.

Step-by-step explanation:

By definition, two solids are similar if their corresponding sides are in the same ratio.

Knowing this, let's find which solids are similar:

Corresponding sides ratio of solids I and II:

\frac{3}{2}=\frac{2}{\frac{4}{3}}=\frac{5}{\frac{10}{3}}

\frac{3}{2}=\frac{3}{2}=\frac{3}{2}

Corresponding sides ratio of solids I and III:

\frac{3}{\frac{9}{2}}=\frac{2}{3}=\frac{5}{8}

\frac{2}{3}=\frac{2}{3}=\frac{5}{8}

Corresponding sides ratio of solids II and III:

\frac{2}{\frac{9}{2}}=\frac{\frac{4}{3}}{3}}=\frac{\frac{10}{3}}{8}}

\frac{4}{9}=\frac{4}{9}=\frac{5}{12}

 You can observe that the solids  I and II are similar.

3 0
3 years ago
Can someone help with this I don’t understand
Karo-lina-s [1.5K]

Answer: see below

Step-by-step explanation:

3x-12=7x+8 ⇔ given

   -12=4x+8 ⇔ addition property of equality

   -20=4x ⇔ subtraction property of equality

      x=-5 ⇔ division property of equality

-----------------------

5(x-1)=4x+13 ⇔ given

5x-5=4x+13 ⇔ distributive property

 x-5=13 ⇔ subtraction property of equality

    x=18 ⇔ addition property of equality

3 0
3 years ago
The Bailey family is traveling 565.5 miles for a family vacation. If they estimate they can travel 78 miles per hour how many ho
Vinil7 [7]
565.5/78
7.25 miles per hours it will takes 
5 0
3 years ago
Can some1 plz help me again, and plz show ur work!?!
Lynna [10]

Answer:

Step-by-step explanation:

Total height lowered = 75m

No of times balloon lowered = 5

Height lowered in each lowering = Total height lowered / No of times balloon lowered

                                                       = 75 / 5

                                                      = 15 m

The number indicated that each time balloon is lowered by 15 m

8 0
3 years ago
Read 2 more answers
Which image is a reflection of the black polygon in quadrant I?
Vadim26 [7]

Answer:

the red polygon in quadrant II

Step-by-step explanation:

It makes the most sense polygon 4 is not the answer because  if we reflected it would be upside down, try to image a mirror in front of polygon 1 it would reflect to polygon 2 make the answer quadrant II.

Please Brainliest :D


3 0
3 years ago
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