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iVinArrow [24]
3 years ago
8

What is the answer in square root

Mathematics
1 answer:
Viefleur [7K]3 years ago
7 0
Hi!
First of all, we can look and see that these sqaure roots are the same, so it's easy to add.

In square roots, if the number INSIDE the square root is the same, it stays that way for the answer .

So the equation is 9(square root) 5 + 4(square root) 5.
The numbers out the sqaure root can just be added. So 9+4 = 13.

Lastly just attach the sqaure root onto the 13

Final answer should be 13(square root)5

***use the actual symbol in place of (sqaure root)

I hope this helps!
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The area of a circle, in terms of π, is 80π m2. Find the value of the radius. Give your answer as a simplified surd.
jolli1 [7]

Answer:

r=4\sqrt{5}\:\: \sf m

Step-by-step explanation:

\textsf{Area of a circle}=\pi r^2 \quad \textsf{(where r is the radius)}

Given:

  • Area = 80π m²

Substitute the given value into the formula and solve for r:

\implies 80 \pi = \pi r^2

\implies \dfrac{80 \pi}{\pi} = \dfrac{\pi r^2}{\pi}

\implies 80=r^2

\implies \sqrt{r^2}=\sqrt{80}

\implies r=\sqrt{80}

\implies r=\sqrt{16 \cdot 5}

\implies r=\sqrt{16}\sqrt{5}

\implies r=\sqrt{4^2}\sqrt{5}

\implies r=4\sqrt{5}

4 0
2 years ago
Read 2 more answers
1. The nominal rate on Sandra's loan is 7.125%. If the interest is compounded monthly, what rate of
Mrrafil [7]

Answer:

She is actually paying a rate of 7.36% of interest.

Step-by-step explanation:

The real interest rate, as a decimal, is given by:

I = (1 + \frac{r}{n})^{n}

In which r is the interest rate and n is the number of compoundings during an year.

The nominal rate on Sandra's loan is 7.125%, compounded monthly:

This means that r = 0.07125, n = 12

So

I = (1 + \frac{0.07125}{12})^{12} = 1.0736

As a percentage: 1.0736*100 = 107.36% - 100% = 7.36%

She is actually paying a rate of 7.36% of interest.

5 0
3 years ago
What is the simplified form of (3x + 2)(4x – 3)? Use a table.
ch4aika [34]

Answer:

Step-by-step explanation:

6 0
3 years ago
Could someone please answer this, and give an explanation. So I can fully understand it.
svp [43]
So the graph shows the cost of the phone call on the y-axis and the length of the phone call on the x-axis.
The question ask is what is the least expensive per minute.
So your equation is cost/time.
Then you plug in the values of each point.
w=$1.25/2 minutes
x=$2/5 minutes
y=$2/10 minutes
z=$2.50/10.5 minutes
Solve each question-
w=0.63 (rounded)
x=0.4
y= 0.2
z=0.24 (rounded)
These values show the cost per minute of each point. So, in order the answer the question which one cost the least per minute you would select the lowest value answer from the question of each point. Which would be y.

7 0
3 years ago
Lindsey owes $5,381 on a credit card with a 24.9% interest rate compounded monthly. What is the monthly payment she should make
Digiron [165]
If you multiply .249*5381= 1339.87
3 0
3 years ago
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