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
beks73 [17]
3 years ago
5

The sum of the areas of two circles is 80 pi square meters find the length of the radius of a radius of each circle if one of th

em is twice the orher
Mathematics
1 answer:
Leno4ka [110]3 years ago
3 0
Let x=small circle
2x = bigger circle

πx^2 + π(2x)^2 = 80π
x^2 + 4x^2 = 80
5x^2 = 80
x^2 = 16
x = +/- 4
but we need the positive one because there's no negative measurement so
the answers are:
4m and 8m
You might be interested in
Write the equation whose roots are 6 and 1, and whose leading coefficient is 4.
Black_prince [1.1K]

Answer:

4(x-6)(x-1) = 0

Standard form: 4x^2-28x+24=0

Step-by-step explanation:

First, let's write an equation where the roots are 6 and 1.

To do that, we can use the intercept form <em>a(x-p)(x-q) = 0</em>, where <em>a</em> is the leading coefficient, and <em>p </em>and <em>q</em> are the roots.

We can therefore plug what we know into this equation:

4(x-6)(x-1) = 0

8 0
2 years ago
Jillian's school is selling tickets for a play. The tickets cost $10.50 for adults and $3.75 for students. The ticket sales
lisov135 [29]

Answer:

b= 322.8

Step-by-step explanation:

10.50a + 3.75b = 2071.50

10.50 (82) + 3.75b = 2071.50

861 + 3.75b = 2071.50

-861                -861

3.75b = 1210.5

/3.75     /3.75

b = 322.8

4 0
3 years ago
What is the greatest whole number that rounds to 621860
Paha777 [63]
621,864
Since the 4 is a smaller digit than a 5, the 6 in the tens place would stay the same while the 4 would become a 0.
5 0
3 years ago
Read 2 more answers
Solve for m and b <br><br>(5,14) and (3,10)​
Elis [28]
Y=mx+b

Y1-Y2/X1-X2

14-10/5-3 = 4/2 = 2


Plug in (3,10):
(10)=2(3)+b

Solve:
10=6+b

B=4
M=2
6 0
3 years ago
Can someone help me with one more pls I’ll comment on yours
just olya [345]

Answer:

A:

The perimeter of the parking lot is 302 yards.

The area of the parking lot is 5,544 yards squared.

B: Perimeter

C: Area

Step-by-step explanation:

A:

To find the perimeter of the parking lot, we add all the sides up. 2L + 2W = Perimeter.

2(63) + 2 (88) = 302

To find the area, we multiply the length by the width. 63 × 88 = 5,544.

B: We need to know the amount of chain needed to surround the parking lot. In other words, we need to line the perimeter with a chain.

C: We would be paving the entire area of the parking lot.

Hope this helps,

❤Nicki❤

6 0
3 years ago
Other questions:
  • PLZ HURRY IT'S URGENT!!!!!!!!
    8·2 answers
  • What is the square root of this number <br> 4900
    12·2 answers
  • Brody is purchasing some tools for his workshop. He has a budget of $120 and needs to buy at least 14 tools. Each hammer costs $
    6·2 answers
  • Complete the equation so that it has solutions of -5 and 7
    15·2 answers
  • An ocean aquarium is home to Gray whale that weighs 35 tons. How many pounds does the Gray whale weigh?
    12·1 answer
  • The value of the digit in the hundreds place in the number 234,865 is 1/10 the value of the digit in the thousands place of whic
    6·1 answer
  • Percentages are numerators of the fractions with denominator
    7·2 answers
  • Did I do this right? If so, are they congruent or not?
    13·1 answer
  • A ladder is 50 ft and cast a 25 ft shadow Mark is 6 ft tall how long would his shadow be​
    6·1 answer
  • Help me??? lol i dont get this
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!