3 years ago

Find Y.Please help Round to the nearest tenth.

Mathematics

2 answers:

labwork [276]3 years ago

5 0

Answer:

32.7

Step-by-step explanation:

Luba_88 [7]3 years ago

4 0

Answer:

Y = arccos[(50^2 + 90^2 - 55^2)/(2 x 90 x 50)] = ~32.7 deg

Hope this helps!

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Y = –A system of equations. y equals negative StartFraction one-half EndFraction x plus 4. x plus 2 y equals negative 8.x + 4

laila [671]

Y = -1/2x + 4

X + 2y = -8

Replace y in the second equation with the first one:

X + 2(-1/2x +4)=-8

Simplify:

X -X +8 = -8

Simplify:

8 = -8

Subtract 8 from both sides:

0 = -16

This is a false statement, so there are no solutions.

7 0

4 years ago

Read 2 more answers

at noon on monday the temperature was 13°f.by 6:00 pm,the temperature had dropped 9 degrees.by midnight the temperature had drop

MissTica

Answer:

-3°

Step-by-step explanation:

if you subtract 9 for 13 ,, you get 4

then when you subtract 7 from 4 it goes into the negative side and gets you negative 3 degrees

7 0

3 years ago

Consider a set of 7500 scores on a national test whose score is known to be distributed normally with a mean of 510 and a standa

german

$\mathbb P(X>600)=\mathbb P\left(\dfrac{X-510}{85}>\dfrac{600-510}{85}\right)=\mathbb P(Z>1.059)\approx0.145$

So approximately 14.5% of the scores are higher than 600. This means in a sample of 7500, one could expect to see $0.145\times7500\approx10.86$ scores above 600.