The answer would be 2 because it reduces to the same system of equations as the original, which I knew since the first equation was the same and if you divide everything in the second by 2, you'll get 3x-y=8. :)

7 0

3 years ago

Can someone help me plz .. Use these lengths to find cos B, tan B, and sin B.

lara [203]

Answer:

cos B = $\frac{7}{25}$

tan B = $\frac{24}{7}$

sin B = $\frac{24}{25}$

Step-by-step explanation:

In the right triangle, there are three sides and 2 acute angles

Hypotenuse ⇒ the opposite side of the right angle

Leg1 and Leg 2 ⇒ the sides of the right angle

The trigonometry functions of one of the acute angles Ф are

sin Ф = opposite leg/hypotenuse

cos Ф = adjacent leg/hypotenuse

tan Ф = opposite leg/adjacent leg

In Δ ACB

∵ ∠C is the right angle

∴ AB is the hypotenuse

∵ AC is the opposite side of ∠B ⇒ leg1

∵ CB is the adjacent side of ∠B ⇒ leg2

→ By using the ratios above

∴ cos B = $\frac{CB}{AB}$ , tan B = $\frac{AC}{CB}$ , sin B = $\frac{AC}{AB}$

∵ CB = 7, AB = 25, AC = 24

∴ cos B = $\frac{7}{25}$

∴ tan B = $\frac{24}{7}$

∴ sin B = $\frac{24}{25}$

6 0

3 years ago

Answer the photo please

alexandr402 [8]

Answer:

66.666666666667% error

Step-by-step explanation:

Percent Error = Vobserved - Vtrue / Vtrue

= 9 - 27 / 27

= -18/27

= -66.666666666667%

= 66.666666666667% error

I hope this helps!

7 0

4 years ago