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3 years ago

PLEASE HELP PLEASE HELP

Mathematics

1 answer:

belka [17]3 years ago

8 0

Work backwards.
18-9=9
9-7=2(2x)
2÷2=1(1x)
Check
1×2=2
(2+7)+9=18
The answer is correct!

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How to solve (4+5)÷3×4

Evgesh-ka [11]

We Need To Remember Order of Operations.

So, We Do:
4+5.
We Know That 4 + 5 = 9, So We Have:
9 ÷ 3 * 4
Now, We Do:
9 ÷ 3
This Is 3, So We Have:
3 * 4.
We Know That 3 * 4 Is 12, So:

We Know That The Answer To This Expression Is 12.

3 0

4 years ago

Read 2 more answers

Work out the height of this triangle with base, b= 7.7mm and area,A=210.21mm

iris [78.8K]

Answer:

h = 27.3

Step-by-step explanation:

A = bh

h = A/b

h = 210.21 / 7.7

h = 27.3

8 0

3 years ago

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bazaltina [42]

19 is the median of the numbers

7 0

3 years ago

Can someone help me please??

worty [1.4K]

Answer:

The little brother should place the mirror at 36 ft from the base of the tree to properly see its top

Step-by-step explanation:

Similar Triangles

Two triangles are defined as similar if their corresponding angles are congruent and the corresponding sides are in proportion. The triangle formed by the kid and the ground and the triangle formed by the tree and the ground are similar since the angle of reflection over the mirror is the same, i.e. the light travels in a straight line. This means that we can set this proportion

$\displaystyle \frac{x}{72}=\frac{2}{4}$

Solving for x

$\displaystyle x=\frac{2\times 72}{4}$

$\boxed{x=36\ ft}$

The little brother should place the mirror at 36 ft from the base of the tree to properly see its top

4 0

4 years ago

BRAINLIEST PLUS 38 POINTS

dlinn [17]

Answer:

8b is 220

Step-by-step explanation:

it might be 220 because we already know that from o to b is 140 degrees. We know that a full circle is 360, so take 140 away from 360, and you get 220.

360-140=220 degrees

Im not sure about the other questions but i hope this helps :)

4 0

4 years ago