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3 years ago

Please answer I can’t retake!

Mathematics

1 answer:

soldier1979 [14.2K]3 years ago

4 0

It would be B) 6 cm. If you construct the triangle, and add the angle measure of 80 + 50= 130 , and then 180- 130= 50, you see that the triangle is isosceles.

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If sin theta = -(sqrt(3))/2 and pi < theta < (3pi)/2, what are the values of cos theta and tan theta?

Gwar [14]

For $\pi$ , we expect $\cos\theta$ . Then recalling that $\sin^2\theta+\cos^2\theta=1$ , we have

$\cos\theta=-\sqrt{1-\sin^2\theta}=-\dfrac12$

Then by definition of tangent,

$\tan\theta=\dfrac{\sin\theta}{\cos\theta}=\dfrac{-\frac{\sqrt3}2}{-\frac12}=\sqrt3$

3 0

4 years ago

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3 over 25 as a percent

Bond [772]

It is 12%. This is because if you divide 3 into 25, you get 0.12. In conclusion, it would be 12%.

4 0

4 years ago

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Find the slope of the line that passes through (4,2) and (9,1)?

pshichka [43]

Answer:

The slope of the line is $\displaystyle -\frac{1}{5}$ .

Step-by-step explanation:

We are given two coordinate points:

$(4, 2)$
$(9, 1)$

We are asked to find the slope of the line.

We can use the rise-over-run formula to solve for the slope of the line.

$\displaystyle \text{slope} = \frac{\text{rise}}{\text{run}}\\\\\text{slope} = \frac{y_2-y_1}{x_2-x_1}$

However, we firstly need to name our coordinate points.

In math, we can label our coordinates using the following label system:

$(x_1, y_1), (x_2, y_2)$

Therefore, we can also label our coordinates as such:

$x_1 = 4$
$y_1 = 2$
$x_2 = 9$
$y_2 = 1$

Now, we can supply these values into the formula and solve for our slope, or a better known variable, <em>m</em>.

$\displaystyle m = \frac{1 - 2}{9 - 4}\\\\m = \frac{-1}{5}\\\\m = -\frac{1}{5}$

Therefore, our slope is $\displaystyle -\frac{1}{5}$ .

8 0

3 years ago

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a brand of cereal had 1.2 milligrams of iron per serving. then they changed their recipe so they had had 1.8 mg of iron per serv

olya-2409 [2.1K]

To get the percent of increase, we will follow these steps:
1- get the difference between the two numbers:
difference = 1.8 - 1.2 = 0.6
2- divide the difference from step one by the original number (the number before the increase) and then multiply the quotient by 100 to get the percent as follows:
% of increase = (0.6 / 1.2) * 100 = 50%

Based on the above calculations, the percent of increase in the amount of iron is 50%

3 0

3 years ago

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The sum of two numbers is 139 and the difference is 53. Explain how to find the two numbers.

Airida [17]

Answer:

43 & 96

Step-by-step explanation:

x=one number

y=other number

x+y=139

x-y=53 x=y+53

substitute for x

y+53+y=139

reduce

2y+53-53=139-53

2y=86

2y/2=86/2

y=43

x=96

5 0

3 years ago