Answer:
Below in bold.
Step-by-step explanation:
The identity is of the form
(a + b)^2 = a^2 + 2ab + b^2.
a) Sqrt 49 = 7 and we need + 28 as the middle coefficient . We get this with
2*7 + 2*7 so the first coefficient is 2*2 = 4.
So * = 4a^2.
(2a + 7)^2 = (2a + 7)(2a + 7) = 4x^2 + 14a + 14a + 49.
b) -6 * -6 = 36 -24 = 2*-6 + 2 *-6 so the last term is 4x^2
c) The middle term must be an 'ab' term.
sqrt 6.25 = 2.5 and sqrt 1/4 = 1/2
So the coefficient of the middle term is 2.5 * 1/2 + 2.5 * 1/2
= 2.5
So the middle term is 2.5ab.
d) The first term will be in b^2.
100 = 10* 10 and we need 2 as a middle term so coefficient of the first term
will be 1/100 or 0.01. as the 2 comes from 0.1 * 10 + 0.01 * 10 and (0.1)^2 = 0.01
So it is 0.01b^2.
Answer:
Step-by-step explanation:
We'll work through this part by part. Half are grazing, and half are not. The half that are not are then cut into fourths. 3/4 of this non grazing half are playing so that leaves 1/4 drinking, which it tells us is 9.
so, if 9 is 1/4, 18 is 2/4 and so on. So 36 is the full number of the half not grazing. So if 36 is one half, the whole group is 72.
Answer:
I would suggest using a app called desmos if you put in the table it will make the graph for you :)
We need to create an equation in order to solve this problem.
Let x = the smallest number
x+1 = next number
x+2 the following number
x+3
x+4
x+5
x+6
So, we add those.
x+x+1+x+2+x+3+x+4+x+5+x+6=105
7x+21=105
7x = 84
x = 12
So the numbers are
12,13,14,15,16,17,18
There are 1002 metres from the top of Anthony's head to the bottom of the skyscraper
A kilometre has 1000 metres, therefore the skyscraper is 1000 metres tall
Add the height of the skyscraper (1000m) and Anthony's height (2m) and you get 1002m
