For question 3, you needn't worry about the number of total students asked. The question is really just asking you what's 45% as a fraction, which is 9/20. This is because 45% = 45/100, divided by 5 = 9/20.
For question 6, just substitute in the values. So you do 4(7 × 4 - 3 × -7), which gives you 4(28 - -21). Two minuses make a plus, so it's just asking you to do 4 × 49 (because 28 + 21 = 49). The answer is 196.
Answer:
b
Step-by-step explanation:
B.................
Answer:
Step-by-step explanation:
traingle ADC and triangle ADB are similar triangles

Substitute the values

Answer:
Add the two equations together to eliminate x from the system.
(−6x+6y=6)+(6x−3y=12)=(3y=18)
Divide each term by 3 and simplify.
y=6
Substitute the value found for y into one of the original equations, then solve for x.
x=5
The solution to the independent system of equations can be represented as a point.
(5,6)
The result can be shown in multiple forms. Point Form: (5,6)
Equation Form: x=5,y=6
Step-by-step explanation: