Can someone please answer questions 1,3,7,9 and 10 for me im dumb and suck so bad at geometry thank you

1,5

Step-by-step explanation:

1)
x^2 -5x + 4 = 0
(x -4)(x - 1) = 0
x - 4 = 0; x = 4
x - 1 = 0; x = 1
answer
x = 1 and x =4

2)
x^2 -7x + 12 = 0
(x-3)(x-4) = 0
x - 3 = 0; x = 3
x - 4 = 0; x = 4
answer
x = 3 and x =4

3)
x^2 + 7x + 6 = 12x
x^2 - 5x + 6 = 0
(x - 3)(x - 2) = 0
x - 3 = 0; x = 3
x - 2 = 0; x = 2
answer
x = 3 and x = 2

4)
15 + 2x = x^2
x^2 - 2x - 15 = 0
(x - 5)(x+ 3) = 0
x - 5 = 0; x = 5
x + 3 = 0; x = -3
answer
x = -3 and x = 5

10. 10
11. -2.8

Hope u enjoyed xD

10. Answer is 9 . (51 - 6) / ( 3.5+5.5)
11. 5x-18 - 4x = -36
x -18 = -36
x = -18
Answer is -18

10.
Total cost = $51
Remove cost for parking
$51 - 6 = $ 45 (this price includes the cost of general admission tickets and riding passes)
$3.50 + $5.50 = $9
$ 45/ $9 = 5
There were 5 people in the family.

11.
Let the number be 'n'
5n - 18 - 4n = -36
n = -36 + 18 = -18
The number is -18

3.50x + 5.50x + 6 = 51
# 10
9x + 6 = 51
Subtract 6 from both sides
9x = 45
Divide both sides by 9
x = 5

#11
5x - 18 - 4x = -36
x -18 = -36
Add 18 to both sides
x = - 18

1. 68, AB is Perpendicular to CB so ABC is 90°, the interior angles of any triangle equal 180 so, given CAB being 22°,

90+22=112,

180-112=68

ACB=68°

2. G=23°, Angle G is equal to 1/2 arc AD, so x+2=1\2(6x-80)

x+2=3x-40

2=2x-40

42=2x

x=21

plug it back in, so...

21+2=23

Angle G equals 23°

The first answer; Nickel has an atomic number of 28 (28 protons). and cobalt has an atomic number of 27 (27 protons).

A: 30% I think not sure

B or C is the answer