What is the length of EF?

Mathematics

2 answers:

kherson [118]3 years ago

6 0

6.403.
Using the pythagoryum theory: A^2+B^2=C^2.
5^2+4^2=41
The square root of 41 is 6.403(Rounded)

ANEK [815]3 years ago

3 0

The slope is 5/4.

5²+4²=41
√41=6.4
EF=6.4 units.

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Multiple Choice Suppose y varies directly as x. if y = 5 when x=8, find y when x=64

Juliette [100K]

Answer:

Step-by-step explanation:

y∞x

then

y=kx (with k as constant)

y=5 when x=8

⇒Putting this in the first equation

⇒5=k×8

⇒k=5/8

Now

y=? when x=64

Putting x=64 in the first equation

y=kx

⇒y=(5/8)×64

We get

y=40

Hope u understand

6 0

4 years ago

Help with this question, please!!

olga2289 [7]

Answer: D

Step-by-step explanation:

You need a calculator for this cause the numbers are really large. I used a fx-9860GII Casio calculator. I put the equations on the graph mode. And then I got the x➡️0 for both equations.

I got x=0, y=5000 for the first equation

x=0, y=5200 for the new one.

You can see the y is (5200-5000)=200 more than the old equation. As the x is 0 for both that means the new one moved 200 up for the new one. It goes up cause its positive number .

I put the pictures so you can understand what I'm saying.