2 answers:
Answer:
140
Step-by-step explanation:
First you have to solve for x
20x + 60 = 30x + 20
so you would subtract 20x from both sides
60 = 10x + 20
then subtract 20 from both sides
40 = 10x
then divide both sides by 10
4 = x
then you would put 4 in for x in the equation for angle 1
20(4) + 60
80 + 60
140
Answer:
angle 1=20(4)+60=140 degrees
Step-by-step explanation:
theory : If two parallel lines are cut by a transversal, the corresponding angles are congruent.
so angle 1 and angle 3 are equal:
20x+60=30x+20
60-20=30x-20x
40=10x
x=40/10=4
angle 1 = 20(x)+60
angle 1=20(4)+60=140 degrees
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Answer:
2 hours and 24 minutes
Step-by-step explanation:
2 hours at 60 km/h means you have travelled 2*60=120 km
120 km at 50 km/h takes 120/50 = 2.4 hours
2.4 hours is 2 hours and 0.4*60 = 24 minutes.
Answer:
102
Step-by-step explanation:
Since 2 + 8 = 10, then the cube root of 5x+2 = 8
Since 8×8×8=512, then 5x+2=512
5x=510, so x=102
The commutative property is a property of <em>addition</em>, not of <em>subtraction</em>. It can work in a subtraction problem if you keep the sign with the number, so you're adding positive and negative numbers.
3 - 6 + 5
= (3) + (-6) + (5)
= (3) + (5) + (-6)
= 3 + 5 - 6
Answer:
x = 5
Step-by-step explanation:
9(x-2) = 3(x+4)
9x - 18 = 3x + 12
9x = 3x + 30
6x = 30
x = 5
18. All you need to do is divide.
