MATHEMATICS MIDDLE SCHOOL

Please helpppp this stuff is due by tonight!!

Answers

Answer 1

Answer:

Answer:

none of the above

Step-by-step explanation:

just had this on a quiz

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Which value must be added to the expression x2 + 12x to make it a perfect-square trinomial?

Answers

x^2 + 12x + 36
which factors into
(x + 6)^2

Answer:

Step-by-step explanation:

Edgenuity

At 1:00 pm the water level in a pool is 13 inches. At 1:30pm the water level is 18 inches. At 2:30pm the water level is 28 inches. What is the constant rate of change?

Answers

From the given question we come to know of certain number of facts and they are:
At 1:00 PM the water level of the pond was = 13 inches
At 1:30 PM the water level of the pond was = 18 inches
At 2:30 PM the water level of the pond was = 28 inches
From the above given facts we can easily find the amount of water changing every half an hour.
Amount of increase in water from 1:00PM to 1:30 PM = (18 - 13) inches
= 5 inches
Amount of increase in water level from 1:30PM to 2:30PM = (28 -18) inches
= 10 inches
From the above two deductions we can come to the conclusion the the constant rate of change in water level is 5 inches for every half an hour.

Per 1/2 an hour it is changes by 5 so the constant rate would be: 5 inches per 1/2 an hour

Please help on question 17 with step by step instructions
Thanks in advance xx

Answers

Let x = Initial Price

If we increase x by 5%, we are adding 0.05x

Therefore, the new price = x + 0.05x = 1.05x

If the ticket has increased by £2.30, £2.30 is 5% of the initial price, or 0.05x

0.05x = 2.30

x = 2.30/0.05

x = 46

Therefore, the price of the ticket before the increase was £46

You can also check this backwards by doing 46*0.05 = 2.30

HELP PLEASE!!!!
BLUEFLOWER3 HALP

Answers

the answer would me C 5(24+18)=210 210*1/2=105.

Solve using quadratic formula x^2+8x=7

Answers

For this case we have the following quadratic equation:

$x ^ 2 + 8x = 7\nx ^ 2 + 8x-7 = 0$

Where:

$a = 1\nb = 8\nc = -7$

We find the solution by:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

Substituting the values we have:

$x = \frac {-8 \pm \sqrt {8 ^ 2-4 (1) (- 7)}} {2 (1)}\nx = \frac {-8 \pm \sqrt {64 + 28}} {2}\nx = \frac {-8 \pm \sqrt {92}} {2}\nx = \frac {-8 \pm \sqrt {2 ^ 2 * 23}} {2}\nx = \frac {-8 \pm2 \sqrt {23}} {2}\nx = -4 \pm \sqrt {23}$

Thus, we have two roots:

$x_ {1} = - 4+ \sqrt {23}\nx_ {2} = - 4- \sqrt {23}$

Answer:

$x_ {1} = - 4+ \sqrt {23}\nx_ {2} = - 4- \sqrt {23}$

would you choose to use a hundred chart to solve 90- 80? why or why. not ? if not. which strategy would work better?

Answers

Yes beacause they aré both close to the number 100

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