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mezya [45]
1 year ago
9

Learn with an example Select the tables that show a proportional relationship between x and y. х y 1 4 3 5 2 8 6 10 4 16 12 20 S

ubmit

Mathematics
1 answer:
koban [17]1 year ago
4 0

The green table shows a proportional relationship between x and y

Here, we want to select the table that shows a propoertional relationship between x and y

In the first table, we can establish that by multiplying the x-values by 4, we get the y-values

Thus, we can establish the relationship that;

\begin{gathered} y\text{ = 4x} \\ or \\ x\text{ = }\frac{y}{4} \end{gathered}

The same cannot be said for the second table as we cannot see a relationship between x and y (a proportional relationship)

With respect to this, we can see that it is the first table that shows the proportional relationship

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Parallel and Perpendicular Equations (help! 40 points!)
PolarNik [594]

Answer:

Step-by-step explanation:

y=mx+c

So in this case, m is (-3/7), which is the slope.

(-3/7)(another slope)=-1

Another slope=3/7

A. The slope is -7/3

B. The slope is 3/7

C. The slope is -7/3

D. The slope is -3/7

Thus, the answer is the bottom of the left hand side, which is 3x-7y=14

Hope it helps!!! Good luck!!

4 0
3 years ago
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Show that √(1-cos A/1+cos A) =cosec A - cot A​
Gennadij [26K]

Hi there!

\sqrt{\frac{1-cosA}{1+cosA}} =

We can begin by multiplying by its conjugate:

\sqrt{\frac{1-cosA}{1+cosA}} * \sqrt{\frac{1+cosA}{1+cosA}}  = \\\\\sqrt{\frac{(1-cosA)(1 + cosA)}{(1+cosA)(1 + cosA)}} =

Simplify using the identity:

1 - cos^2A = sin^2A

\sqrt{\frac{(1-cos^2A)}{(1+cosA)^2}} =\\\\\sqrt{\frac{(sin^2A)}{(1+cosA)^2}} =

Take the square root of the expression:

{\frac{sinA}{1+cosA} =

Multiply again by the conjugate to get a SINGLE term in the denominator:

{\frac{sinA}{1+cosA} * {\frac{1-cosA}{1-cosA} =\\

Simplify:

{\frac{sinA(1-cosA)}{1-cos^2A} =

Use the above trig identity one more:

{\frac{sinA(1-cosA)}{sin^2A} =

Cancel out sinA:

{\frac{(1-cosA)}{sinA}  =

Split the fraction into two:

{\frac{1}{sinA}   - \frac{cosA}{sinA} =

Recall:

1/sinA = cscA\\\\cosA/sinA = cotA

Simplify:

\frac{1}{sinA} + \frac{cosA}{sinA} = \boxed{cscA - cotA}

5 0
2 years ago
1)When adding two negative numbers, _________ the absolute value of the numbers and keep the negative sign.
butalik [34]


1) add.

for example -1 + -2 = - (||-1| + |-2||), which is -(1+2) or -3


2) subtract

for example 4 + -7 = -(||-7| + |4||), which is - |7 - 4| or -3


3) change
for example 3 - (- 2) = 3 + 2


4) -10

the sum is -10.25, which is closest to -10

4 0
3 years ago
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You went shopping and bought a bunch of snacks. You brought 3 bags of cheetos, 2 boxes of fruity pebbles, 4 bags of chocolate an
Elenna [48]

Answer:

4/10

Step-by-step explanation:

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5 0
3 years ago
Pls I need help I'm soooooooooooo confused on my question also please no links because I can't get to them!
saul85 [17]

Answer:

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