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3 years ago

Please answer quickly! This is timed!

Mathematics

2 answers:

ipn [44]3 years ago

5 0

Okay thanks I was just doing the problem by myself and I got D. I did the problem because...why not?

Vlada [557]3 years ago

3 0

Answer: The correct option is

(D) $y=x^2\\\\y=2x+3$

Step-by-step explanation: We are given to select the correct system of equations that can be graphed to find the solution to the following quadratic equation :

$x^2=2x+3$

Let us consider another variable y such that

$y=x^2.$

Then, according to the given equation, we must have

$y=2x+3.$

Therefore, the required system of equations is

$y=x^2\\\\y=2x+3$

Thus, (D) is the correct option.

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Some frogs were on a log. 3 jumped off the log and now there are 5 frogs on the log. How many frogs were on the log at first?

VikaD [51]

Answer: 8

Step-by-step explanation:

5 frogs left on the log

add back the 3 that jumped off the log

5+3=8

3 0

3 years ago

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love history [14]

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3 years ago

How do you solve 2y-7y=5

scZoUnD [109]

Answer:

$y=-1$

Step-by-step explanation:

1. Combine like terms

2y-7y = -5y

-5y=5

2. Divide by -5 and the answer is $y=-1$

6 0

3 years ago

The 3rd term of a geometric sequence is -1/3 and the 8th term is 81. what is the 11th term?

shepuryov [24]

Answer: $t_{11}=-2187$

Step-by-step explanation:

$t_{3}=-1/3$

That is :

$ar^{2} = -1/3$ ................. equation 1

Also

$t_{8}=81$

that is

$ar^{7}=81$ ................. equation 2

divide equation 2 by equation 1 , that is

$\frac{ar^{7}}{ar^{2}} = 81 / -1/3$

$r^{5}=$ $81$ x $-3/1$

$r^{5}= -243$

find the fifth root of both sides

$r = -3$

substitute $r = -3$ , into equation 1 to find a , that is

$a(-3^{2})= -1/3$

$9a = -1/3$

multiply through by 3

$27a = -1$

$a =- 1/27$

To find the 11th term , the formula for the 11th term is given as :

$t_{11}=ar^{10}$

$t_{11}= -1/27(-3^{10})$

$t_{11}=-2187$

6 0

4 years ago

Which equation demonstrates the use of a simple interest formula, to compute the interest earned on $70 at 3% for 12 years?

Hitman42 [59]

I = 70 * 0.03 * 12

Hope this helps!

8 0

3 years ago

*Please answer quickly! This is timed!*

Please answer quickly! This is timed!