Step-by-step explanation:
A+80+15=180
A+95=180
A=180-95
A=85
B+85=180
B=180-85
B=95
Answer:
70 miles per hour
Step-by-step explanation:
Answer:
180°
Step-by-step explanation:
The sum of angles in any triangle is 180°
Answer:
Option 2: (1, 0) and (0, -5)
Step-by-step explanation:
Let's solve this system of equations using the elimination method.
Start by labelling the two equations.
5x -y= 5 -----(1)
5x² -y= 5 -----(2)
(2) -(1):
5x² -y -(5x -y)= 5 -5
Expand:
5x² -y -5x +y= 0
5x² -5x= 0
Factorise:
5x(x -1)= 0
5x= 0 or x -1= 0
x= 0 or x= 1
Now that we have found the x values, we can substitute them into either equations to solve for y.
Substitute into (1):
5(0) -y= 5 or 5(1) -y= 5
0 -y= 5 or -y= 5 -5
y= -5 or -y= 0
y= 0
Thus, the solutions are (0, -5) and (1, 0).
Answer:
350
Step-by-step explanation:
If there are 210 girls, then the number of boys is (210÷3)x7=350.
