Mathematics High School

In ΔQRS, the measure of ∠S=90°, QR = 78 feet, and RS = 61 feet. Find the measure of ∠R to the nearest degree.

Answers

Answer 1

Answer: 38.551=39

cos

−1

(

)

=39

Answer 2

Answer:

Step-by-step explanation:

Related Questions

60 Points I need this answer ASAP plz
If the base angles of a triangle are congruent, use the Law of Sines to show the triangle is isosceles.

Answers

Answer:

The Isosceles Triangle Theorem States that if a triangle contains 2 congruent sides, then the angles opposite those sides are congruent. This theorem can be proved using the Law of Sines: The Law of Sines states that: asinA=bsinB=csinC If a=c, making △ABC an isosceles triangle, then asinA=asinC!

The law of sins says: a/SinA = b/SinB = c/sinC

For this to be an isosceles triangle then side a must equal side c

so then a/sinA = c/sinC

Then you can divide both sides by a and raise to the power of -1 and you would get angle A = angle C which makes this isosceles.

Carter bought 3/4 yard of fabric for an art project. He used 3/8 yard of the fabric. What fraction of a yard of fabric does Carter have left?

Answers

Answer:

3/8

Step-by-step explanation:

He purchased 3/4 yard of fabric, then used 3/8 of it. You would need to subtract the 3/8 from 3/4 because the fabric is being used up.

Rachel has $18.20 deducted from her paycheck every month for insurance. After 6.25 months, how much money has been deducted from Rachel’s checks?
-$11.38
-$18.20
-$113.75
-$1,137.5

Answers

It’s C because 18.2 x 6.25 is 113.75

Without graphing, tell if the coordinate (-3,-15) is a solution
to the inequality shown below by choosing TRUE or FALSE.
2x – y < 5
True
False

Answers

Answer:

False

Step-by-step explanation:

That's your answer

who is the queen of rap and please state your reason.
(its an assignment)

Answers

Answer:

I DON'T KNOW WHO so what is yours

Hi could you help pls it is due tonight at 11:59 and its 10:47

Answers

your answer is: y = 2/5x

Answer:

The slope is 1 or 1/1

Step-by-step explanation:

Solve it by using rise over run.

Hope this helps! :)

Which expression best estimates 6 3/4 ÷ 1 2/3

7 ÷ 2
6 ÷ 1
8 ÷ 3
3 ÷ 2

Answers

Answer:

7 divided by 2

Step-by-step explanation:

I say 7 divided by 2 because if you round 6 3/4 up one you will get 7 and if you round 1 2/3 up one you get 2 so 7 divided by 2 makes most sense

Find the HCF of terms and factorise: 20x3 – 40x2 + 80x

Answers

Answer:

The largest factor that can be pulled out of that expression is 20x, giving you 20x(x² - 2x + 4)

Step-by-step explanation:

20x³ - 40x² + 80x

= 20x(x² - 2x + 4)

WHAT WOULD THISSS BEEEEE ANYONEEE!

Answers

Answer:

Step-by-step explanation:

12×12=144

12 squared equals 144 so square root is 12.

9514 1404 393

Answer:

Step-by-step explanation:

The prime factorization of 144 is ...

144 = 9·16 = 2·2·2·2·3·3

Grouping pairs of similar factors, we have ...

144 = (2·2)·(2·2)·(3·3) = (2·2·3)·(2·2·3) = 12·12

√144 = √(12²) = 12

Can someone help me answer these questions

Answers

Answer:

THERE ALL D

Step-by-step explanation:

They are actually all D

Please I need serious help with this ASAP!!! I will mark brainliest if correct!! Please explain!!!!

Answers

Hey there!

1.) Mid-Segment Theorem

2.) Mid-Point Theorem

3.) Mid-Point Theorem

4.) Vertical Angles

5.) SAS Postulate

Have a super awesome day! :)

When solving this system by elimination, which variable is the most convenient to eliminate,
x or y?
2x + y = 7
3/2 x - y = 7/2

Answers

Answer:

Y is the appropriate variable and the most easiest and convenient to eliminate

name 2x + y = 7 as equation i

and 3/2 x - y = 7/2 as equation ii

then add equation i and ii together

(3/2 + 2) x + y - y = (7 + 7/2)

(7/2) x = (21/2)

x = 3

then put in x = 3 in equation i

4 + y = 7

x = 7 - 4

x = 3

Therefore x = 3 and y = 3

Use words and symbols to describe the value of each term as a function of its position. Then find the value of the twelfth term in the sequence.

Answers

Answer:

21 for the first one, 144 for the second

Step-by-step explanation:

If you're seeing the same problem I am in class, the rule is: N + 9

N is equal to 12 in this equation

12 + 9 is 21.

So, the answer is 21

If there is a second problem, like there is for the one I'm seeing, then this is the answer for that-

Is 12(12)= 144

Hope this helps!

(By the way, I'm horrible at math so this could be completely wrong)

A textbook store sold a combined total of 228 biology and physics textbooks in a week. The number of blology textbooks sold was three times the number of
physics textbooks sold. How many textbooks of each type were sold?

Answers

Step-by-step explanation:

Let us assume p is the number of psychology books and b is the number of biology textbooks.

set up first equation:

we know that the total number of books sold was 393

p+b=393

set up second equation:

we know that there were 79 less biology book sold that psychology so...

p = b + 79

subsitute p in the first equation to solve for b

solve value for p

Please answer please please thank you please thank you for your answer

Which value of x makes the equation
-5x = -35 true?

Answers

x=7 cause -5(7) = -35

If mABD = (2x – 7), mDBC = (8x + 16), and
mABC = 159º, find mABD.

Answers

Answer:

Step-by-step explanation:

hello

What two numbers go there (Part 2)

Answers

Answer:

9 and 7

Step-by-step explanation:

multiply 7 and 1 after that it will 7 and again adding 7 + 2 so it will be 9 so the answer will be 9 and 7

2.
Mega Movies hosted a film premiere on Friday night. They charged $7 for adults and $4 for
children. Ninety-four adults and children attended, and $592 was made in ticket sales. How
many children and how many adults went to the film premiere?

Answers

Answer:

72 adults

22 children

Step-by-step explanation:

Let c = no. of children

a = no. of adults

Then 4c = total sales for the children and

7a = total sales for the adults

So, a + c = 94 and 7a + 4c = 592

-4a - 4c = -376

3a = 216

a = 72 adults

72 + c = 94

c = 22 children

I WILL GIVE 5 STARS SAY THANKS AND MARK BRAINLIEST FOR RIght While training for a marathon, Jan lost 4.2% of her mass. If she lost 2.1 kg, what was her mass, in kilograms, before she started training?

Answers

Answer:

50 kg

Step-by-step explanation:

If f(x)=x+5, what is f-'(x)?

Answers

Step-by-step explanation:

Given

f(x) = x + 5

Let

y = f(x)

y = x + 5

Interchanging the roles of x and y we get

x = y + 5

y = x - 5

f^-1 (x) = x - 5

Hope it will help :)

What is the reference angle or quadrantal angle of sin330°?

Answers

Answer:

-1/2

Step-by-step explanation:

Exact form:-1/2

Decimal form: -0.5

Hope that helps.

If it is correct please click on the crown (only if my answer is correct)

Thank you

19NBoli

3
50%
Draw angle ABC of size 65º.
A-
B
X+

Answers

65* It is drawn with a round ruller...

3 Which best represents x, the missing angle
measure on Sierra's homework?
A x= 30.8°
B x = 61.6°
C X= 75.8°
D x = 151.6°

Answers

I believe it’s D bc 28.4 x 2 = 56.8 +151.6= 208.4 and supplementary angles need to be 180 or higher

Please help will give brainlest

Answers

The answer is x=3
I hope this helps

The mode and median of the data set below have the same value. What is the missing number?

[4, 15, 7, 13, ?, 10

please someone help!

Answers

10 ! (To find the median add the two middle numbers 7,13 = 20 divide 20 by two and you get 10 as your median. Mode means the most common number which means the mode is also 10)

In the month of February I spent 37.45 on coffee and a mug.... How many refills did I get?

8.95 +1.50r= Total

Someone help ASAP!

Answers

8.95 + 1.50r= 37.45

find the value of r ...

which is 19

19 refills

Write an equation in point-slope form for the line through the given point with the given slope. (3,−4);m=−14

Answers

Answer:

y=-14x-4

Step-by-step explanation:

Answer:

y + 4 = - 14(x - 3)

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b ) a point on the line

Here m = - 14 and (a, b ) = (3, - 4 ) , then

y - (- 4) = - 14(x - 3) , that is

y + 4 = - 14(x - 3)

What is 1 17/20 as a percent

Answers

185 Percent

Explanation: Did it on my calculator. :/

Photomath is better

If 6 elephants eat 10 bales of hay, how many bales will 9 elephants eat?

Answers

Answer:

Step-by-step explanation: divide 10 by 6 the multiply the quotient by 9

Answer:

Step-by-step explanation:

6\2=3. 3x3=9 10/2=5 5x3=15

2 examples of a commutative property?

Answers

Answer:

hope this helps :)

Step-by-step explanation:

Commutative property of addition: Changing the order of addends does not change the sum. For example, 4 + 2 = 2 + 4 4 + 2 = 2 + 4 4+2=2+44, plus, 2, equals, 2, plus, 4.

Answer: Commutative property of addition: Changing the order of addends does not change the sum. For example, 4 + 2 = 2 + 4 4 + 2 = 2 + 4 4+2=2+44, plus, 2, equals, 2, plus, 4.

if this makes sense

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This was the question that Bobs history teacher posed to the class. The teacher gave the students an assignment: design a flag with 50 stars. Bob spent hours in the attic of his house, cutting up a 48-star flag and rearranging the stars until they fit just right. He was pleased with his solution to the problem, but his teacher found it less than perfect and gave him a B minus. Outraged, Bob told his teacher that he was going to send his design to his member of Congress, Walter Moeller. His teacher replied that if Bobs design was accepted as the new flag, he would be more than happy to change the grade to an A. A year later, Bob had graduated and was working as a draftsman when he received a call at work. He never would have imagined a call from President Eisenhowerbut that's who it was! Now that Alaska and Hawaii had been admitted as states, Congressman Moeller had succeeded in having Bob's design chosen as the new U.S. flag. 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