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3 years ago

The balloon has a radius of 6 what is the volume of the balloon

Mathematics

1 answer:

KIM [24]3 years ago

6 0

A balloon is a sphere and the volume of a sphere is V=4/3 π.R³

V= 4/3.π.(6³) = 4/3.π.216 = 288π unit³ or ≈ 905 unit³

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Let E=IR be the formula for voltage in a circuit, where E = volts, I =

Varvara68 [4.7K]

Answer:

The answer is ohms=4

Step-by-step explanation:

substitute the letters with numbers and solve:

E=IR

12=I 3

12/3=4

3 0

3 years ago

Solve the following system in three variables using linear combinations. 3x−2y+z=0 4x+y−3z=−9 9x−2y+2z=20

goblinko [34]

Answer:

The solution of the system of equations is

x=2,y=7,z=8

Step-by-step explanation:

we have

3x-2y+z=0

isolate the variable z

z=2y-3x ------> equation A

4x+y-3z=-9 ----> equation B

9x-2y+2z=20 ----> equation C

substitute equation A in equation B and equation C

4x+y-3(2y-3x)=-9

4x+y-6y+9x=-9

13x-5y=-9 -------> equation D

9x-2y+2(2y-3x)=20

9x-2y+4y-6x=20

3x+2y=20 ----> equation E

Solve the system

13x-5y=-9 -------> equation D

3x+2y=20 ----> equation E

Multiply equation E by 2.5 both sides

2.5*(3x+2y)=20*2.5

7.5x+5y=50 -----> equation F

Adds equation D and equation F

13x-5y=-9

7.5x+5y=50

------------------

13x+7.5x=-9+50

20.5x=41

x=41/20.5

x=2

Find the value of y

substitute the value of x in the equation E

3(2)+2y=20

6+2y=20

2y=20-6

2y=14

y=7

Find the value of z

Substitute the value of x and the value of y in equation A

z=2y-3x

z=2(7)-3(2)

z=14-6

z=8

therefore

The solution of the system of equations is

x=2,y=7,z=8

5 0

3 years ago

Help me with this pls

Soloha48 [4]

1. x = 60 degrees, y = 50 degrees
2. e = 85 degrees
3. f = 158 degrees

5 0

2 years ago

A college student took 4 courses last semester. His final grades, along with the credits each class is worth, are as follow: A (

NikAS [45]

Answer:

A college student took 4 courses last semester. His final grades, along with the credits each class is worth, are as follow: A (3), B (4), C (2), and D (3). The grading system assigns quality points as follows: A: 4; B: 3; C: 2; D: 1; and F: 0. Find the student’s GPA for this semester. Round your answer to the nearest thousandth.

another way is

This is a weighted average question. You are going to "weight" each course by the number of credits it is worth and then divide by the total number of credits. In other words, you are going to multiply each grade (A=4, B=3) by the number of credits attached to that grade. This will ensure that the courses that have more credits count more in the overall average. Then you are going to divide by the total number of credits to get the overall GPA.

So,

(3*4 + 4*3 + 2 *2 + 3*1)/(3+4+2+3) = GPA

Step-by-step explanation:

bran-list please

6 0

2 years ago

Write the expanded form of the expression. 7(2x + y)

MAVERICK [17]

Answer:

14x+7y

Step-by-step explanation:

7 0

2 years ago