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3 years ago

Find an equation for the inverse of the relation 17.) Y=4x 19.) Y=3x+1

Mathematics

1 answer:

Pavlova-9 [17]3 years ago

3 0

Answer:

17.) y= x/4

19.) y= (x-1)/3

Step-by-step explanation:

switch the x and y in both equations, so your equations should look like this:

17.) x= 4y

19.) x= 3y+1

17.) divide the 4 on both sides and your equation would be:

y= x/4

19.) subtract the 1:

x+1 = 3y

divide the 3:

y= (x-1)/3

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Which are the roots of the quadratic function f(b) = 62 – 75? Select two options.

elena55 [62]

Answer:

$b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}$

Step-by-step explanation:

Given

$f(b) = b^2 - 75$

Required

Determine the roots

To get the root of the function, then f(b) must be 0;

i.e. f(b) = 0

So, the expression becomes

$0 = b^2 - 75$

Add 75 to both sides

$75 + 0 = b^2 - 75 + 75$

$75 = b^2$

Take square roots of both sides

$\sqrt{75} = \sqrt{b^2}$

$\sqrt{75} = b$

Reorder

$b = \sqrt{75}$

Expand 75 as a product of 25 and 3

$b = \sqrt{25*3}$

Split the expression

$b = \sqrt{25} *\sqrt{3}$

$b = \±5 *\sqrt{3}$

$b = \±5 \sqrt{3}$

$b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}$

The options are not clear enough; however the roots of the equation are $b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}$

4 0

3 years ago

Plz help you have to turn your phone to the side

inn [45]

I agree with your choice

3 0

3 years ago

Read 2 more answers

Need help asap today by 5<br>

WINSTONCH [101]

Answer:

I put a photo of the answers.

Step-by-step explanation:

For the problems, I turned the whole under into a fraction, flipped the second fraction and multiplied.

7 0

3 years ago

Please answer this correctly

aliya0001 [1]

Answer:

1 litre

Step-by-step explanation:

When Joel left the house, his bottle was full. He drank 5/8 of a litre, leaving 3/8 of a litre. Add the two numbers together to find the total.

5/8 + 3/8 = 8/8 = 1

6 0

3 years ago

Hey can you please help me posted picture of question

fredd [130]

The discriminant can be determined from the number of roots of the graph.

If Disc> 0, the function has two distinct roots
If Disc = 0, the function has a repeated root
If Disc < 0, the function has no real root.

Since the given graph has no real root, i.e. it does not cross x-axis at any point, so we can say that the discriminant of the given function is negative.

So the answer to this question is option C

8 0

3 years ago