Answer:
7 + 8 = 7 + 7 + 1.
Step-by-step explanation:
We know that, 'double plus one facts' is used to make the addition of numbers easy.
For e.g. we have 8 + 9 = 17. This addition can also be done as 8 + 8 + 1 = 17 i.e. we write first term twice and add 1 to get the result.
Hence, we give the name to this type of addition as 'double plus one'.
Now, we have to use this fact for 7 + 7.
So, we consider 7 + 8 = 15.
Therefore, 7 + 8 can be written as 7 + 7 + 1
Hence, the double plus one facts for 7 + 7 is 7 + 8 = 7 + 7 + 1.
X (X - 1) = 342
x² - x = 342
x² - x - 342 = 0
X = 19
Answer:
x=4 and y=3
Step-by-step explanation:
put one of the equations in slope form and solve
Answer:
x=12 ADB= 56 BDC= 54
Step-by-step explanation:
ADB and BDC are complementary, so they add up to 90 degrees. In other words ADB+BDC= 90 So I can input my knowns into the equation
(3x+10) + (4x-4) = 90
I combined like terms to give me 7x+6=90
Then I subtract 6 from both sides giving me 7x=84
Last I divide 7 on both sides. x=12
Then I input the x (12) into the equation and solve it from there
3(12)+10 and 4(12)-4
3(12)+10=56
4(12)-4=54
. . . I think. Hope this helps!
Answer:
1. X=95
2. M=60
3.R=70
4.Q=75
5.A=75
6.B=105
7. ∠ACB = ∠BCA
8. ∠DEG = 75
9.∠FOE = 64 ∠COF = 116
10. ∠COE = 137 ∠DOE= 43
11. ∠WXZ = 149
12. ∠RSZ = 99.5
Step-by-step explanation:
