Answer:
1 ten.
Step-by-step explanation:
1 ten = 10 ones/units
Answer:
tan A = -15/8.
Step-by-step explanation:
sin^2a = 1 - cos^2A
= 1 - (-8/17)^2
= 225/289
So sin A= 15/17
tan A = sin A / cos A
= 15/17 / -8/17
= 15/-8
= -15/8.
Answer:
2.5 hours
Step-by-step explanation:
Divide the travelled miles by the amount of hours to get the travelled miles for one hour. (17 miles in 1 hour) Then divide 42.5 by 17 to get the amount of time it takes to go 42.5 miles. (42.5 miles in 2.5 hours)
Hope this helps!
Answer: a). 3kg b). 1kg
Explanation:
let x be the mass of nails
let y be the mass of the box
We can write an equation base on the information:
x + y = 4kg
3x + y = 10kg (screw is 3 times heavier than nail)
We can solve this system of equation using elimination method to find x:
3x + y = 10
x + y = 4
——————
3x + y = 10
-1(x + y = 4)
——————
3x + y = 10
-x - y = -4
——————
2x = 6
x = 6/2 = 3
Now that we have x we can find y:
3x + y = 10
3(3) + y = 10
9 + y = 10
y = 1