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stich3 [128]
4 years ago
12

Simplify: 20 - 2 × 8 + 42 A. 20 B. 160 C. 52 D. 26

Mathematics
1 answer:
Gnom [1K]4 years ago
5 0

Answer: 46

Step-by-step explanation:

You can simplify this using PEMDAS:

Parentheses

Exponents

Multiplication/division

Addition/subtraction

Move through the steps in that order.

In this case, the first two steps are absent, so multiply first:

20 - 16 + 42

Then, add and subtract:

46.

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Step-by-step explanation:

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A price is decreased from £800 to £640. Calculate the percentage change.
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A rectangular tank has length 4m, width 12m and height 3.5..i. If the tank is filled with water 2/3 of its capacity ,calculate t
ipn [44]

Answer:

The volume of the water in the tank is 112 m³

Step-by-step explanation:

The volume of the rectangular prism V = L × W × H, where

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  • H is its height

∵ A rectangular tank has a length of 4 m, a width of 12 m, and

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∵ V = L × W × H

∴ The volume of the tank = 4 × 12 × 3.5

∴ The volume of the tank = 168 m³

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→ That means the volume of the water is  \frac{2}{3}  the volume of the tank

∵ The volume of the water = \frac{2}{3} the volume of the tank

∴ The volume of the water =  \frac{2}{3} × 168

∴ The volume of the water = 112 m³

∴ The volume of the water in the tank is 112 m³

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3 years ago
Round each number to the nearest tenth.
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26.73\approx23.7\\&#10; 89.42\approx89.4
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