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2 years ago

I don’t understand what I’m supposed to do. Someone pls help :’/

Mathematics

1 answer:

pogonyaev2 years ago

6 0

The answer to this problem is A

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The canteen made 15 liters of soup. By the afternoon they had sold

babunello [35]

Answer:

11.25 liters

Step-by-step explanation:

(3 / 4) * (15 liters)

3 0

3 years ago

2. A jeweler bought an antique watch for $500. He then sold it in his store $850. What was the percent of change in the price of

Mars2501 [29]

Answer:

70% increase

Step-by-step explanation:

8 0

2 years ago

Find sin2x, cos2x, and tan2x if sinx=-15/17 and x terminates in quadrant III

vodka [1.7K]

Given:

$\sin x=-\dfrac{15}{17}$

x lies in the III quadrant.

To find:

The values of $\sin 2x, \cos 2x, \tan 2x$ .

Solution:

It is given that x lies in the III quadrant. It means only tan and cot are positive and others are negative.

We know that,

$\sin^2 x+\cos^2 x=1$

$(-\dfrac{15}{17})^2+\cos^2 x=1$

$\cos^2 x=1-\dfrac{225}{289}$

$\cos x=\pm\sqrt{\dfrac{289-225}{289}}$

x lies in the III quadrant. So,

$\cos x=-\sqrt{\dfrac{64}{289}}$

$\cos x=-\dfrac{8}{17}$

Now,

$\sin 2x=2\sin x\cos x$

$\sin 2x=2\times (-\dfrac{15}{17})\times (-\dfrac{8}{17})$

$\sin 2x=-\dfrac{240}{289}$

And,

$\cos 2x=1-2\sin^2x$

$\cos 2x=1-2(-\dfrac{15}{17})^2$

$\cos 2x=1-2(\dfrac{225}{289})$

$\cos 2x=\dfrac{289-450}{289}$

$\cos 2x=-\dfrac{161}{289}$

We know that,

$\tan 2x=\dfrac{\sin 2x}{\cos 2x}$

$\tan 2x=\dfrac{-\dfrac{240}{289}}{-\dfrac{161}{289}}$

$\tan 2x=\dfrac{240}{161}$

Therefore, the required values are $\sin 2x=-\dfrac{240}{289},\cos 2x=-\dfrac{161}{289},\tan 2x=\dfrac{240}{161}$ .

7 0

2 years ago

Find the value of t needed to make the equation shown true. <br><br> 25t = 12.5

-Dominant- [34]

Answer:

1/2

Step-by-step explanation:

Hi Avahosel2020!

To find the value of $t$ we need to simplify the equation:

25 $t$ = 12.5

To just get $t$ , we must divide 25 on both sides:

$\frac{25t}{25}$ = $\frac{12.5}{25}$

<u>We can move the decimal one spot over and add a 0 to the denominator:</u>

$\frac{25t}{25}$ = $\frac{125}{250}$

$t$ = $\frac{125}{250}$

Simplifying!

$\frac{125}{250}$ = $\frac{1}{2}$ .

Thus, $t$ has the value of $\boxed{\frac{1}{2} }$ .

7 0

3 years ago

A local school has was evaluated the the Education Department and received the

Angelina_Jolie [31]

Answer: 79

Step-by-step explanation:

Given the following :

Graduation Rates:

Grade:82

Weight: 50%

Passing Rates:

Grade: 75

Weight: 30%

Enrollment Numbers:

Grade: 60

Weight: 10%

Career readiness:

Grade: 95

Weight: 10%

Overall score : Σ(grade × weight)

(82 × 50%) + (75 × 30%) + (60 × 10%) + (95 × 10%)

= (41 + 22.5 + 6 + 9.5)

= 79

Hence, overall score is 79

5 0

2 years ago