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2 years ago

Can anyone solve it the picture is given below.can you solve all this questions

Mathematics

1 answer:

Inga [223]2 years ago

8 0

Now you can see if I have to go back and get the phone off the screen when you

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Serena bought a total of 135 notebooks and pencils for her students. Each notebook cost $1.75, and each pencil cost $0.35. The t

notsponge [240]

Answer:

81 pencils is the answer

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2 years ago

TIMED!! please help me find the measure of angle 5, 6, and 7

Lisa [10]

Answer:

Description

Step-by-step explanation:

5 = 47, vertical angles

6 = 74, triangle interior angles add up to 180

7 = 59, linear pairs add up to 180

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2 years ago

I really need help with this???

Vadim26 [7]

Answer:

the answer is option A. Because if it is a parallelogram QR must be parallel to TS and QT must be parallel to RS

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3 years ago

9. A circle has an arc of length 56pi that is intercepted by a central angle of 120 degrees. What is the radius of the circle?

SSSSS [86.1K]

Answer:

Part 4) $r=84\ units$

Part 9) $sin(\theta)=-\frac{\sqrt{5}}{3}$

Part 10) $sin(\theta)=-\frac{9\sqrt{202}}{202}$

Step-by-step explanation:

Part 4) A circle has an arc of length 56pi that is intercepted by a central angle of 120 degrees. What is the radius of the circle?

we know that

The circumference of a circle subtends a central angle of 360 degrees

The circumference is equal to

$C=2\pi r$

using proportion

$\frac{2\pi r}{360^o}=\frac{56\pi}{120^o}$

simplify

$\frac{r}{180^o}=\frac{56}{120^o}$

solve for r

$r=\frac{56}{120^o}(180^o)$

$r=84\ units$

Part 9) Given cos(∅)=-2/3 and ∅ lies in Quadrant III. Find the exact value of sin(∅) in simplified form

Remember the trigonometric identity

$cos^2(\theta)+sin^2(\theta)=1$

we have

$cos(\theta)=-\frac{2}{3}$

substitute the given value

$(-\frac{2}{3})^2+sin^2(\theta)=1$

$\frac{4}{9}+sin^2(\theta)=1$

$sin^2(\theta)=1-\frac{4}{9}$

$sin^2(\theta)=\frac{5}{9}$

square root both sides

$sin(\theta)=\pm\frac{\sqrt{5}}{3}$

we know that

If ∅ lies in Quadrant III

then

The value of sin(∅) is negative

$sin(\theta)=-\frac{\sqrt{5}}{3}$

Part 10) The terminal side of ∅ passes through the point (11,-9). What is the exact value of sin(∅) in simplified form?

see the attached figure to better understand the problem

In the right triangle ABC of the figure

$sin(\theta)=\frac{BC}{AC}$

Find the length side AC applying the Pythagorean Theorem

$AC^2=AB^2+BC^2$

substitute the given values

$AC^2=11^2+9^2$

$AC^2=202$

$AC=\sqrt{202}\ units$

$sin(\theta)=\frac{9}{\sqrt{202}}$

simplify

$sin(\theta)=\frac{9\sqrt{202}}{202}$

Remember that

The point (11,-9) lies in Quadrant IV

then

The value of sin(∅) is negative

therefore

$sin(\theta)=-\frac{9\sqrt{202}}{202}$

5 0

3 years ago

Can someone explain scatter plots

allochka39001 [22]

Answer:

a type of plot or mathematical diagram using coordinates to display values for typically two variables for a set of data

Step-by-step explanation:

In a scatter plot has is a line of best fit which shows the closest values to the many on the plot.

8 0

2 years ago

Read 2 more answers

Can anyone solve it the picture is given below.can you solve all this questions​

Can anyone solve it the picture is given below.can you solve all this questions