This is how the first one would be done. sorry if it’s a little messy the answer is 9. but try using photomath for the rest. it gives you the answer and explains how to do it

8 0

3 years ago

What is sin 0 when sec 0 = 5? 0 |(1,0) sin e = 2[?] [] Rationalize the denominator if necessary.

Komok [63]

Answer:

$Sin ~0 =\frac{2\sqrt{5} }{5}$

Step-by-step explanation:

$sec0=\sqrt{5}$

$cos~0=\frac{1}{sec0} =\frac{1}{\sqrt{5} }$

$sin ~0=\sqrt{1-cos^2~0}$

$=\sqrt{1-1/5}=\sqrt{5-1/5}$

$Sin~0=\sqrt{4/5} =2/\sqrt{5}*\sqrt{5}/\sqrt{5}$

$Sin~0=2\sqrt{5}/2=2\sqrt{5}/5$

<u>--------------------------------</u>

hope it helps...

have a great day!!!

7 0

3 years ago

Ms.Hill travels 2400 miles at a rate of 400 miles per day to visit her grandchildren. How many days will it take to complete the

MArishka [77]

For this question, you just divide 2400 by 400 and get how many days it'll take! which, is 6

8 0

3 years ago

Read 2 more answers

1. -2x(x+3)-(x+1)(x-2) =

Simora [160]

Answer:

$-3x^2 -7x + 2$

Step-by-step explanation:

Given

$-2x(x + 3) - (x+1)(x - 2)$

Required

Solve

Open brackets

$-2x^2 -6x - (x^2-2x + x - 2)$

$-2x^2 -6x - x^2-2x + x + 2$

Collect like terms

$- x^2-2x^2 -6x -2x + x + 2$

$-3x^2 -7x + 2$

5 0

2 years ago