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3 years ago

Can any one please help me with math

Mathematics

1 answer:

baherus [9]3 years ago

4 0

Answer:

Step-by-step explanation:

0.5

$\dfrac{1}{5}=0.2\\\\\\5 \% =\dfrac{5}{100}=0.05$

Smallest to greatest:

0.05 ; 0.2 ; 0.5

5% ; 1/5 ; 0.5

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What is 14/26 simplified?

Reika [66]

14/26 simplified is 7/13

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3 years ago

5cosx -2sin(x/2) +7=0<br>Help me to find x step by step<br>pls

miskamm [114]

Answer:

x = 180

Step-by-step explanation:

First, you need to know

1. Double-angle formula:

cos(2x) = $cos^{2}x - sin^{2}x$

2. Pythagorean identity:

$cos^{2}x + sin^{2}x = 1$

Back to your problem, replacing the variable by the above:

$5cosx-sin\frac{x}{2}+7 = 0$

$5(cos^{2}\frac{x}{2}-sin^{2}\frac{x}{2}) - 2sin\frac{x}{2} + 7 = 0$ By Double-angle formula

$5(1 - 2sin^{2}\frac{x}{2}) - 2sin\frac{x}{2} + 7 = 0$ By Pythagorean identity

Given $y = \frac{x}{2}$

$5(1-2sin^{2}y) - 2siny + 7 = 0$

$10sin^{2}y+2siny-12=0$

$5sin^{2}y+siny-6=0$

$(5siny + 6)(siny - 1)=0$ , we know -1 < sinx < 1, for every x ∈ R

$siny = 1, y =90$

$y = \frac{x}{2}$

$x = 180$

8 0

3 years ago

Possible my last brainliest if its right question idk may be more but this one is harsh for me

adelina 88 [10]

Correct Solution: He read 1.5 pages per minute.

Error Analysis: You should’ve divided 3 by 2 not 300. There are 300 pages in the book total. This information is irrelevant to the question. Cole reads 3 pages in two minutes. So you divide 3 by to to find out how many pages he reads per minute. 3/2=1.5

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3 years ago

Which of the following is an equation of the line in the graph?

Alla [95]

Answer:

letter D po Ang answer

Step-by-step explanation:

sana makatulong po Ito

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2 years ago

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3/4 of a number increased by 1/2 is equal to 14. <br> find the number

PIT_PIT [208]

Answer:

Step-by-step explanation:

14*2=28

28(3/4)=21

21/(3/4)=28

28/2=14

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3 years ago

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