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3 years ago

Help PLS ILL GIVE BRAINLIEST FOR CORRECT ANSWER

Mathematics

1 answer:

Licemer1 [7]3 years ago

3 0

The answer is D ! U just have to see the numbers the left corner

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The average high temperature was 86° in august then 93° in September. What is the percent increase or decrease

SSSSS [86.1K]

The increase was 7 degrees

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2 years ago

If a1=7 and d=28, find a9

Mariulka [41]

Answer:

Step-by-step explanation:

Since a1=7 and the question is to find a9, you just have to multiply 7 and 9 which is 63

6 0

3 years ago

URGENT HELP PLEASE!

Vaselesa [24]

Answer:

(a) $x=\dfrac{\pi}{8},\dfrac{3\pi}{8},\dfrac{9\pi}{8},\dfrac{11\pi}{8}$

(b) $x=\dfrac{3\pi}{2},\dfrac{\pi}{6},\dfrac{5\pi}{6}$

Step-by-step explanation:

It is given that $0\leq x\leq 2\pi$ .

(a)

$\sqrt{2}\sin 2x=1$

$\sin 2x=\dfrac{1}{\sqrt{2}}$

$\sin 2x=\dfrac{\pi}{4}$

$2x=\dfrac{\pi}{4},\dfrac{3\pi}{4},\dfrac{9\pi}{4},\dfrac{11\pi}{4}$ $[\because \sin x=\sin y\Rightarrow x=n\pi+(-1)^ny]$

$x=\dfrac{\pi}{8},\dfrac{3\pi}{8},\dfrac{9\pi}{8},\dfrac{11\pi}{8}$

(b)

$\csc^2 x-\csc x-2=0$

$\csc^2 x-2\csc x+\csc x-2=0$

$\csc x(\csc x-2)+1(\csc x-2)=0$

$(\csc x+1)(\csc x-2)=0$

$\csc x=-1\text{ or }\csc x=2$

$\sin x=-1\text{ or }\sin x=\dfrac{1}{2}$ $[\because \sin x=\dfrac{1}{\csc x}]$

$x=\dfrac{3\pi}{2}\text{ or }x=\dfrac{\pi}{6},\dfrac{5\pi}{6}$

Therefore, $x=\dfrac{3\pi}{2},\dfrac{\pi}{6},\dfrac{5\pi}{6}$ .

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3 years ago

Is 10y^4 -3y^2+11 a polynomial? If yes what kind?

nikklg [1K]

it is a type of trinomial polynomial because it contains 3 terms with fundamental signs. 

hope it helps you

5 0

2 years ago

Read 2 more answers

represent the following sentence as an algebraic expression, where A number is X. A number more than 2.

xxMikexx [17]

Answer:

A>2 = X

If you simplify this then it just means A=X but A is more then 2.

I think ...

6 0

3 years ago