How many whole numbers have exactly 3 digits

Mathematics

2 answers:

galben [10]2 years ago

8 0

999 because If you add one to 999 it's 1,000 and you'll go into the 4 digits

solmaris [256]2 years ago

4 0

The biggest one is 999.

If you started counting from 1 to 999, you would count to 99
before you get to the first 3-digit number.

So there are (999 - 99) = 900 of them.

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Factor the expression 90+36

Nata [24]

Answer:

18 is the factor of 90 and 36 the rest are 1,2,3,6,9 hope it helps:)

Step-by-step explanation:

5 0

2 years ago

a rock is launched from a canon. it's height, h(x), can be represented by a quadratic function in terms of time, x, in seconds.

ratelena [41]

This is the quadratic function:
h(x)=ax²+bx+c

We have two points:
(1,58)
(2,112)

Now, we calculate this quadratic funtion.

we assume that h(0)=0
Therefore:
a(0)²+b(0)+c=0
c=0

(1,58)
a(1)²+b(1)=58
a+b=58 (1)

(2,112)
a(2)²+b(2)=112
4a+2b=112
2a+b=56 (1)

With the equations (1) and (2) we make a system of equations:
a+b=58
2a+b=56
we can solve this system of equations by reduction method.
-(a+b=58)
2a+b=56
---------------------
a=-2

-2(a+b=58)
2a+b=56
-------------------
-b=-60 ⇒ b=60

The function is:
h(x)=ax²+bx+c
h(x)=-2x²+60x

Now find the height, in feet, of the rock after 10 seconds in the air.

h(10)=-2(10)²+60(10)
h(10)=-200+600=400

Answer: 400 ft.

6 0

2 years ago

Read 2 more answers

What’s the slope of the line?

ivolga24 [154]

Answer:

$m=\frac{3}{4}$