Answer:
12x-3y
Step-by-step explanation:
10x3 + x + X
Group like terms
10x + x +X-3
Add similar elements: 10x + x + x = 12x
= 12x - 3y
Remark
Are you sure you don't mean that (x - 7) is squared? The way you have written it indicates that it is squared. I'll treat it that way and you can leave a not if I am wrong.
Solution
(x - 7)^2 - 25 = 0 Add 25 to both sides
(x - 7)^2 - 25 + 25 = 25 Combine the left
(x - 7)^2 = 25 Take the square root of both sides.
sqrt(x - 7)^2 = sqrt(25)
x - 7 = +/- 5 Add 7 to both sides
x = 7 +/- 5
=========
x1 = 7 + 5
x1 = 12
x2 = 7 - 5
x2 = 2
Smallest x = 2
Largest x = 12
If you are talking about finding the slope of BC then it looks like you have to find the square root of 3 which is approx 1.7 then find the slope.
slope equation is rise over run (or y over x): y1 + y2 divided by x1 + x2.
From this you should be able to find the answer
Answer:
14, 21, and 63
Step-by-step explanation:
we can set the three unknown numbers as x, y, and z
so
x + y + z =98
now we are given that the first (x) is seven less than the second (y)
x = y - 7
the third number (z) is three times the second (y)
z = 3y
since we have an equation for z and x in terms of y, we can plug it into the first equation and solve for y.
(y-7) + y + (3y) =98
y - 7 + y + 3y =98
y + y + 3y =105
5y = 105
y=21
now that we know y, we can plug its value into either the second or the third equation to find x or z (I chose to find z first)
z = 3y
z = 3(21)
z = 63
now we can plug in y to find x
x = y - 7
x = 21 - 7
x = 14
so the three numbers should be 14, 21, and 63
Answer:
1cm, 2.4cm, 2.6cm
Step-by-step explanation:
They have to follow the pythagorean theorem a^2+b^2=c^2.
1^2+2.4^2=2.6^2 so it follows the pythagorean theorem so these three squares would form a right triangle.
