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HACTEHA [7]
3 years ago
9

Which expressions are equivalent to (7^-2)*(7^6)

Mathematics
2 answers:
Ierofanga [76]3 years ago
8 0

Answer:

D

Step-by-step explanation:

(7^-2)*(7^6)=7^-2+6

......since the base 7 is the same, when u multiply them, you should add the exponents and keep 7 as it is. That will be 7^4, which in equivalent to ans D(7^2)^2.

Triss [41]3 years ago
5 0

Answer:

A and D

Step-by-step explanation:

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A quadratic equation is shown below: 3x^2 − 15x + 20 = 0 Part A: Describe the solution(s) to the equation by just determining th
Anuta_ua [19.1K]
These are two questions and two answers:

Question 1:

<span>A quadratic equation is shown below: 3x^2 − 15x + 20 = 0 Part A: Describe the solution(s) to the equation by just determining the radicand. Show your work.

Answer: </span><span>The negative value of the radicand means that the equation does not have real solutions.

Explanation:

1) With radicand the statement means the disciminant of the quadratic function.

2) The discriminant is: b² - 4ac, where a, b, and c are the coefficients of the quadratic equation: ax² + bx + c

3) Then, for 3x² - 15x + 20, a = 3, b = - 15, and c = 20

and the discriminant (radicand) is: (-15)² - 4(3)(20) = 225 - 240 = - 15.

4) The negative value of the radicand means that the equation does not have real solutions.

Question 2:

Part B: Solve 3x^2 + 5x − 8 = 0 by using an appropriate method. Show the steps of your work, and explain why you chose the method used.

Answer:
</span> two solutions x = 1 and x = - 8/3x

Explanation:

1) I choose factoring (you may use the quadratic formula if you prefer)

2) Factoring

Given: 3x² + 5x − 8 = 0

Make 5x = 8x - 3x: 3x² + 8x - 3x - 8 = 0

Group: (3x² - 3x) + (8x - 8) = 0

Common factors for each group: 3x(x -1) + 8(x - 1) = 0

Coomon factor x - 1: (x - 1) (3x + 8) = 0

The two solutions are for each factor equal to zero:

x - 1 = 0 ⇒ x = 1
3x + 8 = 0 ⇒ x = -8/3

Those are the two solutions. x = 1 and x = - 8/3
4 0
3 years ago
solve systems of equation. equation number 1: 9 x squared + 4 y squared equals 144. equation 2: x squared plus y squared equals
grigory [225]
9x^{2} + 4y^{2} =144
x^{2} + y^{2}=24

9x^{2} + 4y^{2} =144
 4x^{2} + 4y^{2}=96
by the difference 
5x^{2}=48
so x=\sqrt{\frac{48}{5}} or x=-\sqrt{\frac{48}{5}}
and y^{2}=24-\frac{48}{5}
then y=\sqrt{\frac{72}{5}} or -\sqrt{\frac{48}{5}}
5 0
3 years ago
Can you kindly help me out please?!
Mila [183]

Answer:

32h^7

Step-by-step explanation:

(4h^4)3=64h^12

64h^12/2h^5=

32h^12/2h^5=32h^7

Hope this helps :)

5 0
2 years ago
Type the correct answer in each box. Use numerals instead of words.
Hatshy [7]

Answer:

(4,-3) and (-2,5)

Step-by-step explanation:


It was given that the points (-3,4) and (5,-2) are on the graph of the function f.


If g is the inverse function of f, then g will take the y-values as inputs and give the x-values as outputs.

Hence we will have the ordered pairs (4,-3) and (-2,5)

on g.


In other words, f and g are symmetric about the line y=x. This implies that when we reflect the points (-3,4) and (5,-2) in the line y=x we will obtain (4,-3) and (-2,5).


This point must lie on g.


8 0
3 years ago
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Jan has 37.50 tickets to a concert concert 5.25 each how many tickets can Jan buy
alexandr1967 [171]
Number of tickets= X
To find the number of tickets, divide the money Jan has with the cost of each ticket.
So,
X =37.50/ 5.25=7.14

But since she can't buy part of a ticket, Jan can buy 7 tickets
4 0
3 years ago
Read 2 more answers
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