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3 years ago

Which parent function has a range of (-∞,∞)? (there are 4 answers)

Mathematics

1 answer:

Nutka1998 [239]3 years ago

8 0

I need the number to answer

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Atwo digit postive number is such that the ones digit is 2.5 times ad much as the tens digit if the number obtained when the dig

Sholpan [36]

Answer:

25.

Step-by-step explanation:

We can write the expression as 10x + 2.5x where x is the tens digit.

So reversed we have 25x + x.

- and 25x + x - (10x + 2.5x) = 27

22.5x - 9x = 27

13.5x = 27

x = 2 and 2.5x = 5.

So the number is 25.

5 0

3 years ago

HELP!!!!! Find the number of solutions of the equation 5t2 + 3t − 7 = 0 by using the discriminant.

Charra [1.4K]

Answer:

Below in BOLD.

Step-by-step explanation:

1. The discriminant D = b^2 - 4ac

= 3^2 - 4*5*(-7)

= 9 + 140

= 149.

Positive value so it has 2 real solutions.

2. D = (-12)^2 - 4 * 9 * 4

= 144 - 144

= 0.

So it has one real solution.

3. D = 2^2 - 4*1*3

= -8.

It is negative so there are No real solutions.

4. D = 4^2 - 4*2*10 = 16 - 80 = -64.

No solutions.

5. D = (-12)^2 - 4*3*(12)

= 144 - 144 = 0

So its the second choice.

3 0

3 years ago

The endpoints of a diameter of a circle are A(3,1) and B(9,9). Find the area of the circle in terms of pie

andrey2020 [161]

Answer:

The answer is $25\pi$ units squared.

Step-by-step explanation:

If we find the diameter, we can find the radius by halving the diameter.

We can find the diameter by using the endpoints of the diameter.

The distance formula will give us the length between (3,1) and (9,9).

The distance formula is $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ .

The distance between the $x$ 's is 9-3=6.

The distance between the $y$ 's is 9-1=8.

The distance between the points is given by $\sqrt{6^2+8^2}=\sqrt{36+64}=\sqrt{100}=10$ .

The radius is therefore $\frac{10}{2}=5$ .

We are asked to find the area of this circle.

The formula for finding the area of a circle is $\pi r^2$ .

Since the radius is $5$ , then the area in terms of $\pi$ ,(pi), is $\pi (5)^2=\pi (25)$ .

The answer is $25\pi$ units squared.

4 0

3 years ago

What's the answer??????????

IRISSAK [1]

Answer:

Step-by-step explanation:

first simplify the exponent

4^2 = 16

so u would get

2 + 16 / 2 • 5 - 10

then divide and multiply to get

2 + 8 • 5 - 10

2 + 40 - 10

then add and subtract

42 - 10 = 32

3 0

3 years ago

Read 2 more answers

Answer help need answer now plz help

Musya8 [376]

Answer:

I think the answer is A

maybe it's right

5 0

3 years ago