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3 years ago

Multiply and subtract

Mathematics

1 answer:

WITCHER [35]3 years ago

4 0

Answer:

26x³ - 12x² + 5x + 7

Step-by-step explanation:

(2x³ - 3x + 11) - (3x² + 1) x (4 - 8x)
2x³ - 3x+11 - (12x² - 24x³ + 4 - 8x)
2x³ - 3x + 11 - 12x² + 24x³ - 4 + 8x
26x³ + 5x + 7 - 12x²

= 26x³ - 12x² + 5x + 7

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3 years ago

Tan x=3/5 nearest tenth

dolphi86 [110]

Answer:

$x\approx31\°$

Step-by-step explanation:

Given expression:

$\tan x=\frac{3}{5}$

To solve for $x$ to nearest tenth.

Solution:

We have:

$\tan x=\frac{3}{5}$

In order to solve for $x$ we will tan inverse tan on both sides in order to isolate $x$ .

$\tan^{-1}(\tan x)=\tan^{-1}\frac{3}{5}$

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2 years ago

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3 years ago

A rectangular garden has a perimeter of 48cm and an area of 140 sq. cm. what is the width of this garden

swat32

A) 2L + 2W = 48
B) L * W = 140
B) W = 140 / L
Inputting this to equation A)
A) 2L + 2*(140 /L) = 48
L + 140/L = 24
Multiplying both sides by "L"
L² + 140 = 24L
L² -24L +140 = 0
(L -10) * (L-14) = 0
L= 10
L = 14
If length = 10 then width =14
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