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3 years ago

A charity organization had a fundraiser

Mathematics

1 answer:

Leokris [45]3 years ago

6 0

nsiemwjakanjwmwmwne jenwismzmzskwomwkemeoekemosmeiemeismiwmeiskwjainsnwiama

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Help with Trigonometric identities

Gre4nikov [31]

Answer:

Option 2

Step-by-step explanation:

Since theta is in the third quadrant, the sine of theta is negative.

By the Pythagorean identity,

$\sin \theta=-\frac{\sqrt{105}}{13}$

So, using the double angle formula for sine, we get that

$\sin 2\theta=\frac{16\sqrt{105}}{169}$

3 0

1 year ago

Eli and Samantha work at a dry cleaners ironing shirts. Eli can iron 20 shirts per hour, and Samantha can iron 35 shirts per hou

Tomtit [17]

Answer:

see the explanation

Step-by-step explanation:

Let

x ----> the number of hours Eli worked

y ----> the number of hours Samantha worked

we know that

Eli and they ironed 400 shirts between them

$20x+35y=400$ -----> equation A

Samantha worked 2 more hours than Eli

$y=x+2$ ----> equation B

solve the system by substitution

substitute equation B in equation A

$20x+35(x+2)=400$

solve for x

$20x+35x+70=400\\55x=330\\x=6$

Find the value of y

substitute the value of x in equation B

$y=6+2=8$

therefore

The number of hours Eli worked was 6 and the number of hours Samantha worked was 8

8 0

2 years ago

in a wood there are 420 silver birch trees, 160 oak tees and 300 wild cherry trees. what is the percentage of the oak trees give

elena-14-01-66 [18.8K]

Answer:

18.2%

Step-by-step explanation:

The total number of trees in the wood = 420 + 160 + 300

= 880 trees

∴ The percentage of the oak trees = $\frac{160}{880} * \frac{100}{1}$

= $\frac{2 * 100}{11}$ %

= $\frac{200}{11}$ %

= 18.181818...%

In 1 decimal place = 18.2%

Hope this helps!!

8 0

3 years ago

Help help help help help

IceJOKER [234]

Answer:

let me take a guess and if its wrong sorry

Step-by-step explanation:

5 0

3 years ago

The distance between two towns on a map is 9 centimeters. the actual distance between two towns is 63 kilometers. what is the sc

Ilia_Sergeevich [38]

If your trying to find the unit rate or the scale of the map, you need to figure out how many kilometers are per centimeters. To get that you need to do 63 divided by 9, witch would get you 7. So to my ability, the answer would be 1 cm per 7 kilometers. Hopefully this answer helped you and I'm hoping its correct.

5 0

2 years ago

Read 2 more answers