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3 years ago

Please help me Sooo confused!!!

Mathematics

2 answers:

SashulF [63]3 years ago

8 0

Well let's say x = -1000
That's what I would do

vova2212 [387]3 years ago

5 0

Answer:

Answer can be :

(x + 1)/2 < -1

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Six fruit smoothies use 2 1/2 cups of strawberries. How many cups of strawberries are needed for 8 fruit smoothies? Write a prop

USPshnik [31]

The answer is 20 cups of strawberries. 2.5 x 8=20

3 0

3 years ago

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10°5 / 10*3* I need help answering this question

Snowcat [4.5K]

Answer:

$\frac{5}{3}$

Step-by-step explanation:

Cancel the common factor of 10

to get the exact form of 5/3

Hope this helps

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3 years ago

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If 180° < α < 270°, cos⁡ α = −817, 270° < β < 360°, and sin⁡ β = −45, what is cos⁡ (α + β)?

eduard

Answer:

$cos(\alpha+\beta)=-\frac{84}{85}$

Step-by-step explanation:

we know that

$cos(\alpha+\beta)=cos(\alpha)*cos(\beta)-sin(\alpha)*sin(\beta)$

Remember the identity

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

step 1

Find the value of $sin(\alpha)$

we have that

The angle alpha lie on the III Quadrant

The values of sine and cosine are negative

$cos(\alpha)=-\frac{8}{17}$

Find the value of sine

$cos^{2} (\alpha)+sin^2(\alpha)=1$

substitute

$(-\frac{8}{17})^{2}+sin^2(\alpha)=1$

$sin^2(\alpha)=1-\frac{64}{289}$

$sin^2(\alpha)=\frac{225}{289}$

$sin(\alpha)=-\frac{15}{17}$

step 2

Find the value of $cos(\beta)$

we have that

The angle beta lie on the IV Quadrant

The value of the cosine is positive and the value of the sine is negative

$sin(\beta)=-\frac{4}{5}$

Find the value of cosine

$cos^{2} (\beta)+sin^2(\beta)=1$

substitute

$(-\frac{4}{5})^{2}+cos^2(\beta)=1$

$cos^2(\beta)=1-\frac{16}{25}$

$cos^2(\beta)=\frac{9}{25}$

$cos(\beta)=\frac{3}{5}$

step 3

Find cos⁡ (α + β)

$cos(\alpha+\beta)=cos(\alpha)*cos(\beta)-sin(\alpha)*sin(\beta)$

we have

$cos(\alpha)=-\frac{8}{17}$

$sin(\alpha)=-\frac{15}{17}$

$sin(\beta)=-\frac{4}{5}$

$cos(\beta)=\frac{3}{5}$

substitute

$cos(\alpha+\beta)=-\frac{8}{17}*\frac{3}{5}-(-\frac{15}{17})*(-\frac{4}{5})$

$cos(\alpha+\beta)=-\frac{24}{85}-\frac{60}{85}$

$cos(\alpha+\beta)=-\frac{84}{85}$

4 0

3 years ago

A salesman will earn a commission equal to 1/10 of the total amount sold. If he sells a car with a price of $24,000 what is his

riadik2000 [5.3K]

Answer:

The answer would be c

Step-by-step explanation:

3 0

2 years ago

Help!!!

DochEvi [55]

I think it’s b so yea

6 0

2 years ago