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VMariaS [17]
3 years ago
15

Which expression is equal to 4√20 - 3√45

Mathematics
1 answer:
zheka24 [161]3 years ago
3 0

Answer:

D.−√5

Step-by-step explanation:

4 sqrt(20) -3 sqrt(45)

We know that sqrt(ab) = sqrt(a) sqrt(b)

4 sqrt(4) sqrt(5) - 3 sqrt(9) sqrt(5)

4 *2 sqrt(5) - 3 *3 sqrt(5)

8 sqrt(5) - 9 sqrt(5)

- sqrt(5)

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value of x is for values that are excludedor or left out

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Evaluate. 75-2(9-5)²+2³
Andreyy89
75-2(9-5)^2+2^3

First, solve the parentheses:

75-2(4)^2+2^3

Next, the exponential terms

75-2(16)+8

Solve the multiplication:

75-32+8

Add and subtract:

51

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1 year ago
What is the image of point (4, 3) if the rotation is -270º ?
Ludmilka [50]

Answer:

OK so you point is y=4 and x=3 so plot that on a x,y graph. Then to turn it -270 degrees you need to clock wise. normally you would just go counter clock wise but since your rotation is negative you go counter clock wise. hope this helped!!

Step-by-step explanation:

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3 years ago
Using the figure below, determine the value of x.
Bad White [126]

I'm relatively sure that it is 9 but idk rly. Hope this helps!

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3 years ago
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Please help..not too sure on how to work this out.
lina2011 [118]

Answer and Step-by-step explanation:

Ok, it's basically just parts of a circle circumference and area equation. Let's start first by writing down both equations.

C = 2πr

C = πd

A = πr^{2}

Now, all we have to do is plug in the values into those equations!

4. C = 2π(12)                  A = π(12^{2})

r = 12

d = 24     <---- (12 times 2 equals 24)

C = 24π

A = 144π   <---- (12 times 12 (itself) equals 144)

5. C = π4.8                  A = π(4.8^{2})

r = 2.4            <------- (4.8 divided by 2 equals 2.4)

d = 4.8

C = 4.8π

A = 23.04π    <------- (4.8 times 4.8 equals 23.04)

6.  20π = 2πr                  A = πr^{2}

r = 10            <------- (20π divided by π and divided by 2)

d = 20          <------- (20π divided by π)

C = 20π

A = 100π    <------- (10 times 10 equals 100)

7.  C = 2πr                  81π = πr^{2}

r = 9            <------- (81π divided by π and square rooted equals 9)

d = 18          <------- (9 times 2 equals 18)

C = 18π      <------- (2 times 9 equals 18, times π)

A = 81π

#teamtrees #WAP (Water And Plant) #ELM (Every Life Matters)

6 0
2 years ago
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