Answer:
35
Step-by-step explanation:
Double the first equation and get 2x + 2y = 300 (1). Call the second equation 2x + 5y = 405 (2). Calculate (2) - (1) to get 3y = 105, so y = 35.
The area of the rectangle is
3x4=13
The area of the triangle is 4
The total area will be 13+4=17
<span>First set: 7, 24, 25.
Square 7, 24 and 25.
Add together the squares of 7 and 24.
Compare this sum to the square of 25. </span>
On her third test she should get 67 marks
so therefore 71 + 87 + 67 = 225
225 divide by 3 (as three tests) = 75
Answer:
Yes!
Step-by-step explanation:
That’s because a square is a parallelogram with four congruent sides and four right angles.
