All categories

2 years ago

I'm thinking of a number. This number is 12 less than its square. What could my number be?

Mathematics

1 answer:

omeli [17]2 years ago

5 0

let nwmber to be X

the number is 12 less than it's square,

so X=12-X^2

=> X^2+X-12=0

=> (X+4)(X-3)=0

=>X= 3, or X=-4

in math we don't usually take negative numbers into account so your number would be 3

You might be interested in

Help me pleaseeeeeeeeee

leonid [27]

A is the answer i think

if not then c

5 0

3 years ago

A stone dropped from a bridge strikes the water 2.2 s later. How high is the bridge above thewater

vivado [14]

Let the only force acting on the ball is the gravity (free-failing) and the ball was initially stationary
vo = 0

s = vot + 1/2 gt^2

s = 1/2 x 10 x (2.2) ^2 = 24.2 m

3 0

3 years ago

Read 2 more answers

2. Saul invested an average of $425 per month since age 30 in various securities for his

BabaBlast [244]

Answer:

$507.30

Step-by-step explanation:

-Given the monthly deposits are $425 and the interest rate is 3.5% for 30 years.

-The amount of the investment after 30 years is calculated as;

$A=P(1+i/n)^n, n=time \ in \ months\\\\=425(1+0.035/12)^{30\times 12}\\\\=1212.65$

-Assuming Saul started saving at age 20, his investment term will be 40 yrs.

-His investment amount is thus:

$A=P(1+i/n)^n, n=time \ in \ months\\\\=425(1+0.035/12)^{40\times 12}\\\\=1719.95$

#We subtract to find how much more he would have if he started saving at 20;

$=A_{20}-A_{30}\\\\=1719.95-1212.65\\\\=507.30$

Hence, Saul would have $507.30 more had he started saving 10 years earlier.

5 0

3 years ago

a square has a perimeter of 38 inches we want to know the length of each side chose the best model for this problem

Vesna [10]

48 i think I don’t nun of this that I why I got it to get answers not give them smh

7 0

3 years ago

the temerature outside is dropping three degrees per hour.whats an expression that represents the total change in temperature af

alukav5142 [94]

-3h

where h is the hour
-3*8=-24
so in eight hour the temperature would be 24 degree

3 0

2 years ago