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Elena L [17]
4 years ago
14

Elvin reads 4/7 of his book he has 126 pages left to read how many has he read already

Mathematics
1 answer:
RSB [31]4 years ago
8 0

126/3 = 42

42 x 4 = 168

126 + 168 = how many pages there are in the book

168 pages is how much he has already read!

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A shooting star forms a right triangle with the Earth and the Sun, as shown below:
Semmy [17]

I found this!!!!

The scientist can use these two measurements to calculate the distance between the Sun and the shooting star by applying one of the trigonometric functions: Cosine of an angle.

- The scientist can substitute these measurements into cos\alpha=\frac{adjacent}{hypotenuse}cosα=

hypotenuse

adjacent

and solve for the distance between the Sun and the shooting star (which would be the hypotenuse of the righ triangle).

Step-by-step explanation:

You can observe in the figure attached that "AC" is the distance between the Sun and the shooting star.

Knowing the distance between the Earth and the Sun "y" and the angle x°, the scientist can use only these two measurements to calculate the distance between the Sun and the shooting star by applying one of the trigonometric functions: Cosine of an angle.

This is:

cos\alpha=\frac{adjacent}{hypotenuse}cosα=

hypotenuse

adjacent

In this case:

\begin{gathered}\alpha=x\°\\\\adjacent=BC=y\\\\hypotenuse=AC\end{gathered}

α=x\°

adjacent=BC=y

hypotenuse=AC

Therefore, the scientist can substitute these measurements into cos\alpha=\frac{adjacent}{hypotenuse}cosα=

hypotenuse

adjacent

, and solve for the distance between the Sun and the shooting star "AC":

cos(x\°)=\frac{y}{AC}cos(x\°)=

AC

y

AC=\frac{y}{cos(x\°)}AC=

cos(x\°)

y

7 0
3 years ago
Video GameOnions$.37 eachTurkey$1.89 lb.Green Beans$0.53 a canCorn$0.59 an earHeavenly Ham$1.99 a poundPotatoes$4.75 a sackApple
Stolb23 [73]

Answer:

0.3145

1.6065

0.4505

0.5015

1.6915

4.0375

4.2415

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1.3515

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6 0
3 years ago
11 NEED HELP ASAP WILL GIVE BRAINLY
fomenos

Answer:

the second answer seems to be the most reassonable

Step-by-step explanation:

3 0
3 years ago
Multiply.<br> 4v (3)<br> help?
dsp73

Answer:

12th ...

Step-by-step explanation:

4v (3)

=4v × 3 = 12v

6 0
3 years ago
If Martha earns $3.25 per hour for babysitting, how much will she earn in: 1.5 hours? 2.5 hours? 3.5 hours?
IgorC [24]
IF MARTHA EARNS 3.25/HOUR FRO BABYSITTING (SHE IS UNDERPAID!)
IN 1.5 HOURS=3.25*1.5=4.88 DOLLARS
IN 2.5 HOURS=3.25*2.5=8.13 DOLLARS
IN 3.5 HOURS=3.25*3.5=11.38 DOLLARS  

6 0
3 years ago
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