Answer:
(-1, 3)
Step-by-step explanation:
to solve using substitution, you have to know the value of either x or y. in this example, they gave you the value of y already: y=x+4.
this means you can substitute the y for (x+4). if we substitute y for (x+4) in the equation y=-5x-2, we get this:
(x+4)=-5x-2
then solve for x
6x=-6
so x=-1
since we know the x value, we can solve for y
y=x+4
y=-1+4
y=3
so the final answer is (-1, 3)
Answer:
n=17/a
Step-by-step explanation:
isolate the variable by dividing each side by factors that don't contain the variable
Answer: 30 square inches.
Step-by-step explanation: Take the equation, V=(1/3)AH
For V=Volume, A=Area of base, and H=equals the height of the triangular pyramid.
We know the area of the base is 9, and the height is 10. So, multiply 10x9. You get 90.
Now, to get the v, you divide 90 by 3 to get 30. V=30.
Answer:
A is an irregular pentagon - total angle is 540. So x is 100
(540 - 440=100)
B. 3a + 345 = 540
- 345 both sides
3a=195
÷3
a = 65
2a = 130 (65x2)
C. X = 120 (angles on straight lines adds to 180)
3y + 300 = 540
- 300
3y = 240
÷3
Y= 80
x 2
2Y = 160
Hope this helps!
