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3 years ago

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

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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

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3 years ago

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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

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3 years ago

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