All categories

3 years ago

23+8-(14-(7-2+3) step by step

Mathematics

1 answer:

Snowcat [4.5K]3 years ago

7 0

Step 1: Do the most inner parenthesis (7-2+3) = 5 + 3 = 8.

23+8-(14-8)

Step 2: Do the next parenthesis (14-8) = 6

23+8-6

23+8 = 31

31 - 6 = 25

So, 25 is your answer!

You might be interested in

Help me plssssss i don’t know how to do this

makkiz [27]

Answer:

AC = $\sqrt{15}$

Step-by-step explanation:

Assuming you require AC

Using Pythagoras' identity in the right triangle

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides , that is

AC² + BC²= AB²

AC² + 7² = 8²

AC² + 49 = 64 ( subtract 49 from both sides )

AC² = 15 ( take square root of both sides )

AC = $\sqrt{15}$ ≈ 3.87 ( to 2 dec. places )

7 0

3 years ago

Hi, so I was wondering if anyone knows the surface area of a cylinder if the diameter is 7.5? Thank you so much! :)

disa [49]

Answer:

206.17

Key(s):

$A = 2\pi \frac{d}{2} h + 2\pi \left(\frac{d}{2}\right)^2$

Substitute d for the actual diameter, 7.5, and h for the height, which is 5.

Step-by-step explanation:

$A = 2\cdot\pi \cdot\frac{7.5}{2} \cdot5 + 2\cdot\pi \cdot\left(\frac{7.5}{2}\right)^2$ ≈ 206.17(2 DP)

6 0

2 years ago

Given: KLMN is a parallelogram m∠K : m∠KLM=1:3 LF ⊥ KN , LD ⊥ NM Find: m∠FLD

SIZIF [17.4K]

In a parallelogram, opposite angles are equal and since it is a quadrilateral, the angles add up to 360°

<NKL = <LMN = X
<KLM = <KNM = 3X
So, 2(x+3x) = 360°
80x = 360°
x = 45°
The figure LFND is another quadrilateral where:
<LFN = <NDL =90°
<FND = 3x

So, (90×2)+3x+ (angle FLD) = 360°
Angle FLD = 360° - 180° - (3×45)°
= 360° - 315°
= 45°

7 0

3 years ago

Read 2 more answers

Need 78 pieces of wood 29 cm long. Boards are 6 m long. How many boards are needed?

Wittaler [7]

I believe the answer is 4 because 6m/29= 20.6897 and so then you do 20.6897 x 3= 62.0691. So 3 is too small so do 20.6897x 4= 82.7588. 82 >78 so the answer is that you need 4 boards.

5 0

3 years ago

A cylindrical can of soup has a diameter of 7 cm and a height of 10 cm. How much soup is in the can, in terms of π?

Natasha2012 [34]

Answer:

B) 122.5π cm3

Step-by-step explanation:

Volume of a cylinder = $\pi r^{2} h$