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3 years ago

The graph of a quadratic function is shown on the grid.

Mathematics

1 answer:

Vinvika [58]3 years ago

8 0

Answer:

Step-by-step explanation:

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Cos(x+y)/cosxcosy+tanxtany=1

adelina 88 [10]

Answer:

See explanation

Step-by-step explanation:

Use formula

$\cos (x+y)=\cos x\cos y-\sin x\sin y$

Substitute it into the first fraction:

$\dfrac{\cos (x+y)}{\cos x\cos y}\\ \\=\dfrac{\cos x\cos y-\sin x\sin y}{\cos x\cos y}\\ \\=\dfrac{\cos x\cos y}{\cos x\cos y}-\dfrac{\sin x\sin y}{\cos x\cos y}\\ \\=1-\dfrac{\sin x}{\cos x}\cdot \dfrac{\sin y}{\cos y}\\ \\=1-\tan x\tany$

Consider the whole expression:

$\dfrac{\cos (x+y)}{\cos x\cos y}+\tan x\tan y\\ \\=1-\tan x \tan y+\tan x\tan y\\ \\=1$

Done!

6 0

3 years ago

Find the solution to the system of equations x = -6 + 2y and x = 2y + 2.

andrew-mc [135]

x=-6+2y

x=2+2y

by subtraction

___________________________

x=-8

Substitute x by one of the two equations :

x=-6+2y

-8=-6+2y

2y=-8+6

2y=-2

y=-2/2

y=-1

I think this is the answer

I hope I helped you^_^

5 0

3 years ago

How to figure out "L"

mrs_skeptik [129]

Answer:

Add 30 to each side so L+L/3+L=630 then Multiply each side by 3 so 3L+L+3L=630 then add together the L's to get 7L=630 then divide by 7 so L=90

4 0

3 years ago

Read 2 more answers

A sail is in the form of a right triangle that is four times as high as it is wide.The sail is made from 32 square meters of mat

NISA [10]

5x/2=32

5x=64

x=12.8 (width)

4x=51.2 (length)

6 0

4 years ago

What’s the mean of 55,60,60,40,60,75,40,25

Mazyrski [523]

Answer:

51.625

Step-by-step explanation:

you add them all up to get 415 then you divide by eight because there are eight numbers that you add up to get the answer 51.625

8 0

3 years ago

Read 2 more answers