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2 years ago

What's the square root of 20 to the nearest tenth

2 answers:

7 0

If you know your square roots, you know the number should be between 4 and 5 because 4^2 is 16 and 5^2 is 25. The answer is 4.4721 but rounded it should be 4.5 because the 7 is more than 5 and it should be rounded up.

denpristay [2]2 years ago

6 0

The answer is 4.5. Hope this helps.

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For which pair of functions is the vertex of k(x)7 units below the vertex of f(x)?

kvv77 [185]

Answer: Option C

$f(x) = x^2;\ k (x) = x ^ 2 -7$

Step-by-step explanation:

Whenever we have a main function f(x) and we want to transform the graph of f(x) by moving it vertically then we apply the transformation:

$k (x) = f (x) + b$

If $b> 0$ then the graph of k(x) will be the graph of f(x) displaced vertically b units down.

If $b> 0$ then the graph of k(x) will be the graph of f(x) displaced vertically b units upwards.

In this case we have

$f (x) = x ^ 2$

We know that this function has its vertex in point (0,0).

Then, to move its vertex 7 units down we apply the transformation:

$k (x) = f (x) - 7\\\\k (x) = x ^ 2 -7$ .

Then the function k(x) that will have its vertex 7 units below f(x) is

$k (x) = x ^ 2 -7$

3 0

3 years ago

How to Increase 8 by 9.4%

Fed [463]

Answer:

75.2

Step-by-step explanation:

multiple 8 by 9.4

4 0

2 years ago

Can someone understand this? 2 3 and 4 plz

Sholpan [36]

Yes, I know these problems!

8 0

3 years ago

The button on Sam's calculator that calculates the sine of an angle is broken.

Galina-37 [17]

Tan 18 = opposite side/adjacent side

0.3249 = 4/adjacent side

and adjacent side = 4/0.3249 = 12.31

Now let's apply Pythagoras to find x

4² + 12.31² = x²
16 + 151.55 = x² and x² = 167.55
Then x = √167.55 and x = 12.94 ≈ 13

3 0

2 years ago

Estimate the answer to 65.78 + 13.43 by first rounding each number to the nearest tenth.

gizmo_the_mogwai [7]

65.8 + 13.4 = 79 .2. So the answer is c

6 0

3 years ago