3 years ago

Help please! asap and thanks

Mathematics

1 answer:

Strike441 [17]3 years ago

3 0

The answer is D. Tell me if this works.

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Please help me now I’m a beginner and I so need help please explain how did you get you answer so I understand thanks

Irina-Kira [14]

Answer:y=2.5(x)

Step-by-step explanation:y=2.5(x)

y=2.5(2)= y=5

7 0

2 years ago

Sin α = 21/29, α lies in quadrant II, and cos β = 15/17, β lies in quadrant I Find sin (α - β).

Sever21 [200]

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

$\sin\alpha=\dfrac{21}{29}\implies \cos^2\alpha=1-\sin^2\alpha=\dfrac{400}{841}$

Since $\alpha$ lies in quadrant II, we have $\cos\alpha$ , so

$\cos\alpha=-\sqrt{\dfrac{400}{841}}=-\dfrac{20}{29}$

$\cos\beta=\dfrac{15}{17}\implies\sin^2\beta=1-\cos^2\beta=\dfrac{64}{289}$

$\beta$ lies in quadrant I, so $\sin\beta>0$ and

$\sin\beta=\sqrt{\dfrac{64}{289}}=\dfrac8{17}$

So

$\sin(\alpha-\beta)=\dfrac{21}{29}\dfrac{15}{17}-\left(-\dfrac{20}{29}\right)\dfrac8{17}=\dfrac{475}{493}$

8 0

3 years ago

If y = -12 when x = -9, find y when x = -4

mihalych1998 [28]

-12/-9=y/-4
cross multiply

-9y=48
divide by 9 on each side

y= -5.33

7 0

3 years ago

Please help im doing a test and it’s due soon

swat32

Answer:

the answer is D.

Step-by-step explanation:

.............

7 0

2 years ago

Your drawer contains 10 red socks and 7 blue socks. It's to dark to see which are which,but you grab two anyway.What is the prob

den301095 [7]

P(both red)=(10/17)(9/16)
P(both blue)=(7/17)(6/16)

P(both same)= sum of above 2 = (90+42)/(16*17)=132/(16*17)=<span>0.485

coz both same means both blue or both red
</span>

4 0

3 years ago

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