1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kitty [74]
3 years ago
15

Paul has grades 63 and 81 on his first two test. What must he score on his third test in order to have an average of at least 70

Mathematics
2 answers:
telo118 [61]3 years ago
7 0

first you take 63 and 81 add them together you get 144 then divide by 2 because you have two numbers  then you get 72.which means he got a 66% on his last test here is the work:

63+81+66=210

210 divided by 3=

70%

hope this helps


Savatey [412]3 years ago
3 0
To get an average of 70 on his test Paul needs to score at least 66 on his third test
You might be interested in
Which of the following is the solution to |x-13|<18
serious [3.7K]

Rewrite the inequality without the absolute value

-18 < x - 13 < 18

Add 13 to the whole equation

-18 + 13 < x < 18 + 13

Simplify

<u>-5 < x < 31</u>

3 0
3 years ago
Read 2 more answers
If f(x)=x2+2x+3 what is the value of f(x) when x=6
Marat540 [252]

The answer is 51

————————

7 0
3 years ago
A scale model drawing of a backyard is 6 centimeters wide and 8 centimeters long. The scale model uses a scale in which 2 centim
rodikova [14]

Answer:

First you need to divide 1.6 by 2 to get .8 then multiply

.8 x 6 = 4.8

.8 x 8 = 6.4

Then multiply 4.8 by 6.4 and get 30.72

5 0
3 years ago
Find the complex fourth roots of 81(cos(3pi/8) + i sin(3pi/8))
BartSMP [9]
By using <span>De Moivre's theorem:
</span>
If we have the complex number ⇒ z = a ( cos θ + i sin θ)
∴ \sqrt[n]{z} =  \sqrt[n]{a} \ (cos \  \frac{\theta + 360K}{n} + i \ sin \ \frac{\theta +360k}{n} )
k= 0, 1 , 2, ..... , (n-1)


For The given complex number <span>⇒ z = 81(cos(3π/8) + i sin(3π/8))
</span>

Part (A) <span>find the modulus for all of the fourth roots
</span>
<span>∴ The modulus of the given complex number = l z l = 81
</span>
∴ The modulus of the fourth root = \sqrt[4]{z} =  \sqrt[4]{81} = 3

Part (b) find the angle for each of the four roots

The angle of the given complex number = \frac{3 \pi}{8}
There is four roots and the angle between each root = \frac{2 \pi}{4} =  \frac{\pi}{2}
The angle of the first root = \frac{ \frac{3 \pi}{8} }{4} =  \frac{3 \pi}{32}
The angle of the second root = \frac{3\pi}{32} +  \frac{\pi}{2} =  \frac{19\pi}{32}
The angle of the third root = \frac{19\pi}{32} +  \frac{\pi}{2} =  \frac{35\pi}{32}
The angle of the  fourth root = \frac{35\pi}{32} +  \frac{\pi}{2} =  \frac{51\pi}{32}

Part (C): find all of the fourth roots of this

The first root = z_{1} = 3 ( cos \  \frac{3\pi}{32} + i \ sin \ \frac{3\pi}{32})
The second root = z_{2} = 3 ( cos \  \frac{19\pi}{32} + i \ sin \ \frac{19\pi}{32})

The third root = z_{3} = 3 ( cos \  \frac{35\pi}{32} + i \ sin \ \frac{35\pi}{32})
The fourth root = z_{4} = 3 ( cos \  \frac{51\pi}{32} + i \ sin \ \frac{51\pi}{32})
7 0
3 years ago
Choose Yes or No to tell whether or not the symbol needs to flip when completing this inequality:
a_sh-v [17]

Answer:

Yes because you are working with negatives

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • Solve by factoring or finding square roots x^2-6x-7=0
    15·2 answers
  • What is the decimal of 3hundreds and 109 hundreds
    10·2 answers
  • If a rectangle has a perimeter of 70 and width of 21, what is the length
    5·1 answer
  • What is the value of x and y
    12·1 answer
  • If f(x) = 5x + 40, what is f(x) when x=-5?
    9·1 answer
  • Simplify:<br><br> -10(x – 7) – 3x<br> A. -13x + 70<br> B. -13x + 3<br> C. 7x + 7<br> D. 7x + 10
    7·2 answers
  • I will give brainliest and 5 stars​
    5·1 answer
  • HELP ME PLEASE EDCITE !!!!
    5·1 answer
  • A painter used 1 1/2 gallons of paint to paint 3/4 of a room. At this same rate, how many gallons will it take to paint the whol
    7·2 answers
  • 2. Which of these situations can be represented by the
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!