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stepladder [879]

3 years ago

8

Plz help me I will mark brainlest whoever answers with explanation

1 answer:

levacccp [35]3 years ago

7 0

Answer:

1. 3

2. -2.5+3= .5

3. <__________________>

-5 -4 -3 -2 -1 0 1 2 3 4 5

^ ^ ^

Step-by-step explanation:

When you add 3 to -2.5, the result is a positive .5. I wasn't sure what the number line meant, so I did my best

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Sin theata=3/5, then cos theata= ?

Elena-2011 [213]

$\bf sin(\theta )=\cfrac{\stackrel{opposite}{3}}{\stackrel{hypotenuse}{5}}\impliedby \textit{let's find the \underline{adjacent side}}
\\\\\\
\textit{using the pythagorean theorem}
\\\\
c^2=a^2+b^2\implies \sqrt{c^2-b^2}=a
\qquad
\begin{cases}
c=hypotenuse\\
a=adjacent\\
b=opposite\\
\end{cases}
\\\\\\
\sqrt{5^2-3^2}=a\implies \pm\sqrt{25-9}=a\implies \pm 4=a
\\\\[-0.35em]
\rule{34em}{0.25pt}\\\\
~\hfill cos(\theta )=\cfrac{\stackrel{adjacent}{\pm 4}}{\stackrel{hypotenuse}{5}}~\hfill$

5 0

3 years ago

The expression that is equal to -10(4x – 5).

notka56 [123]

The best answer to your question would have to be -40x - 50

4 0

2 years ago

Billy left home at 9 a.M. And rode his bicycle to the park at an average speed of 10 miles per hour here I got the park at 9:30

tamaranim1 [39]

Answer:

Park is <u>5 miles</u> from Billy's home.

Step-by-step explanation:

Given:

Billy left home at 9 a.m. And rode his bicycle to the park at an average speed of 10 miles per hour here and got the park at 9:30 a.m.

Now, to find the distance from park to Billy,s home.

Time it took Billy to rode his bicycle from park to home is from 9.30 a.m to 9.30 p.m.

So, the time = (9.30 - 9.00) = 30 minutes

$=\frac{30}{60}$ $=0.5\ hour.$

Speed = 10 miles per hour.

Now, to get the distance from park to Billy's home we put formula:

$Distance=Speed\times Time.$

$Distance=10\times 0.5$

$Distance=5\ miles.$

Therefore, park is 5 miles from Billy's home.

3 0

3 years ago

(2x2 + 5x - 7) + ( 3 - 4x2 + 6x)

velikii [3]

$\qquad\qquad\huge\underline{{\sf Answer}}♨$

Here's the solution :

$\qquad \sf \dashrightarrow \:(2 {x}^{2} + 5x - 7) + (3 - 4 {x}^{2} + 6x)$

$\qquad \sf \dashrightarrow \: 2{x}^{2} + 5x - 7 + 3 - 4 {x}^{2} + 6x$

$\qquad \sf \dashrightarrow \:2 {x}^{2} - 4 {x}^{2} + 5x + 6x - 7 + 3$

$\qquad \sf \dashrightarrow \: - 2 {x}^{2} + 11x - 4$

3 0

2 years ago

I got stuck, I don’t even know where to start I think the answer is A but idk. Help pls

kolbaska11 [484]

Answer:

yeah, it's A your correct!

hope it helps;)

4 0

3 years ago