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babunello [35]
2 years ago
6

Does anyone know how to get more points in khan academy mastery challenge??

Mathematics
2 answers:
astra-53 [7]2 years ago
8 0

Answer:

just be smart

Step-by-step explanation:

vaieri [72.5K]2 years ago
6 0

Answer:

I would say getting all the them right.

Step-by-step explanation:

There isn't really a way to get more points unless you're getting the questions all correct- So I would say just grind those points!

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A candle maker has rectangular block of paraffin that is 4 centimeter high by 8 centimeter long by 6 centimeter wide. He melts i
Veronika [31]

Answer:

The candle will not use all the paraffin from the original block.

Step-by-step explanation:

The cone-shaped candle is 5 cm wide at the base i.e. the diameter of the base is 5 cm i.e. radius is 2.5 cm.

If the height of the cone is 25 cm, then total volume of the cone shaped candle is  

\frac{1}{3}\pi  r^{2} h

= \frac{22 \times 2.5^{2} \times 25 }{3 \times 7}

= 163.69 cubic cm.

Again, the volumes of the rectangular block of paraffin is (4 × 8 × 6) = 192 cubic cm.

Since, 192 > 163.69

Therefore, the candle will not use all the paraffin from the original block.

5 0
3 years ago
The total cost after tax to repair Deborah's computer is represented by 0.09(60h)+60h, where h represents the number of hours it
marishachu [46]

Answer:

0.09(60h)

Step-by-step explanation:

The part that represents the tax is 0.09.

This is because, we can rewrite the sum as;

Amount of tax + Total cost for the number of hours

Now, the amount of tax can only be a percentage of the total

We can write 0.09 as 9/100

This can be interpreted as 9% of the total amount

So therefore we can rewrite the amount as;

9% of 60h + 60h

So the part that represents the amount of tax Deborah has to pay is 0.09(60h)

7 0
3 years ago
HELP PLEASE! 30 POINTS!
OLga [1]
600,158÷153 square miles = 3922.6
8 0
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Read 2 more answers
50 POINTS!
krek1111 [17]
The area of MKC is 14cm
5 0
3 years ago
Please Help, Geometry Work due Tomorrow
iren2701 [21]

Answer:

1) x= 7

2)a. x=8, x=1

b.x=4,x=-1

3)(5,2)

Step-by-step explanation:

problem 1:

1) Distribute

4(x-5)=x+1

4x-20=x+1

2) Add 20 to both sides of the equation

4x-20=x+1

4x-20+20=x+1+20

3) Simplify

*Add the numbers

4x=x+21

4) Subtract x from both sides of the equation

4x=x+21

4x-x=x+21-x

5) Simplify

*Combine like terms

3x=21

6) Divide both sides of the equation by the same term.

3x=21

3x/3=21/3

7) Simplify

*Cancel terms that are in both the numerator and denominator

*Divide the numbers

Result: x=7

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

problem 2:

a

1) Use the sum-product pattern

Identify a, b, and c in your equation and then find two numbers that when multiplied together equal c and when added together equal b.

x²-9x+8=0

2) Factor

* Write your equation in factored form

(x-8)(x-1)=0

3) Create two separate equations

*set each factor equal to 0

x-8=0

x-1=0

4) solve

*rearrange and isolate the variable to find each solution

x=8

x=1

b.

1) move terms to the left side

2x²+7x-4=x²+10x

2x²+7x-4-(x²+10x)=0

2) distribute

2x²+7x-4=x²+10x

2x²+7x-4-x²-10x=0

3) combine like terms

2x²+7x-4-x²-10x=0

1x²+7x-4-10x=0

4) Multiply by 1

1x²+7x-4-10x=0

x²+7x-4-10x=0

5) combine like terms

x²+7x-4-10x=0

x²-3x-4=0

6) Use the sum-product pattern

Identify a, b, and c in your equation and then find two numbers that when multiplied together equal c and when added together equal b.

x²-3x-4-0

7) Factor

Write your equation in factored form

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

8) Create two separate equations

Set each factor equal to zero

x-4=0

x+1=0

9) Solve

Rearrange and isolate the variable to find each solution

x=4

x= -1

-=----------------------

problem 3:

x+4y=13

x-y-3

multiplying this one by -1

x+4y=13

-x+y=-3

0x+5y=10

5y=10

y=10/2

y=2

since we know that

x-y=3

x-(2)=3

x=5

(5,2)

4 0
2 years ago
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