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3 years ago

What is lenth of EF

Mathematics

2 answers:

butalik [34]3 years ago

6 0

Answer:

6 Because if you count the squares Im not 100% sure

Step-by-step explanation:

It is also positive

oee [108]3 years ago

6 0

Answer:

$\sqrt{58}$

Step-by-step explanation:

$EF = \sqrt{ {3}^{2} + {7}^{2} } = \sqrt{9 + 49} = \sqrt{58}$

If they want a decimal answer just type √(58) in a calculator.

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Grace is measured for her annual check up. She is inches tall. Last year she was inches tall. How much did she grow in one year?

Ne4ueva [31]

You didn't include the actual number in inches.

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4 years ago

Point F is on circle C. What is the length of line segment GF?

Levart [38]

The answer:
the full question is as follow:
Point F is on circle C. What is the length of line segment GF?

12.5 units
15.0 units
17.5 units
20.0 units

according to the image, GF= GC + CF

CF is the radius of the circle, so it is CF =CE = 7.5
all that we want to find is the value of GC
let's consider the triangle GEC. This is a right triangle, so for finding GC, we can apply Pythagorean theorem

that is, GE² + EC² = GC², and from this, we have GC = sqrt(GE² + EC² )

GC = sqrt(10² + 7.5² )=sqrt(56.25)=12.5

therefore, GF= GC + CF=12.5 + 7.5 = 20.0
the answer is 20.0 units

8 0

3 years ago

Read 2 more answers

What is b plus 14 written a expression

Romashka-Z-Leto [24]

Answer: b+14
Hope it helps :)

6 0

3 years ago

Carla is renting a canoe. It’s cost $80 for 2 hours and $160 for 4 hours. What is the rate per hour?

patriot [66]

Carla is renting a canoe. It’s cost $80 for 2 hours and $160 for 4 hours. What is the rate per hour?

If we want to get a full understanding of this question we must use the information given.

If renting the canoe cost $80 per 2 hours, to get 1 hour we must divide $80 by 2.

 $\frac{80}{2}=40$

or $40

We can also use $160 and 4 hours

$\frac{160}{4}=40$

or $40

So the rate per hour is $40

8 0

4 years ago

Read 2 more answers

How to prove this???

swat32

$\cos^3 2A + 3 \cos 2A \\
\Rightarrow \cos 2A (\cos^2 2A + 3) \\
\Rightarrow (\cos^2 A - \sin^2 A) (\cos^2 2A + 3) \\
\Rightarrow (\cos^2 A - \sin^2 A) (1 - \sin^2 2A + 3) \\
\Rightarrow (\cos^2 A - \sin^2 A) (4 - \sin^2 2A) \\
\Rightarrow (\cos^2 A - \sin^2 A) (4 - (2\sin A \cos A)(2\sin A \cos A)) \\
\Rightarrow (\cos^2 A - \sin^2 A) (4 - 4\sin^2 A \cos^2 A) \\ 
\Rightarrow 4(\cos^2 A - \sin^2 A) (1 - \sin^2 A \cos^2 A) 
$

go to right side now

$4( \cos^6 A - \sin^6 A)\\
\Rightarrow 4( \cos^3 A - \sin^3 A)(\cos^3 A + \sin^3 A)$

use $x^3 - y^3 = (x-y)(x^2 + xy + y^2)$ and $x^3 + y^3 = x^2 - xy + y^2$

$4( \cos^6 A - \sin^6 A)\\ \Rightarrow 4( \cos^3 A - \sin^3 A)(\cos^3 A + \sin^3 A) \\
\Rightarrow 4(\cos A - \sin A)(\cos^2 A + \cos A \sin A + \sin^2 A) \\
~\quad \quad\cdot ( \cos A + \sin A)(\cos^2 A - \cos A \sin A + \cos^2 A)$

so $\sin^2 A + \cos^2 A = 1$

$4( \cos^6 A - \sin^6 A)\\ \Rightarrow 4(\cos A - \sin A)(\cos^2 A + \cos A \sin A + \sin^2 A) \\ ~\quad \quad\cdot ( \cos A + \sin A)(\cos^2 A - \cos A \sin A + \cos^2 A) \\ \Rightarrow 4(\cos^2 A - \sin^2 A)(1 + \cos A \sin A )(1- \cos A \sin A ) \\ \Rightarrow 4(\cos^2 A - \sin^2 A)(1 - \cos^2 A \sin^2 A )\\ \Rightarrow 4(\cos^2 A - \sin^2 A)(1 - \sin^2 A \cos^2 A ) \\
 \Rightarrow Left hand side$

4 0

3 years ago

What is lenth of EF​

What is lenth of EF