x - 7y = 19 <em>multiply both sides by 5</em>
5x - 35y = 95
Substitute 5x = -2y - 16:
(-2y - 16) - 35y = 95
(-2y - 35y) - 16 = 95 <em>add 16 to both sides</em>
-37y = 111 <em>divide both sides by (-37)</em>
y = -3
Put the volue of y to the first equation:
x - 7(-3) = 19
x + 21 = 19 <em>subtract 21 from both sides</em>
x = -2
<h3>Answer: x = -2 and y = -3 → (-2, -3)</h3>
Answer:
A = 328 tons, B = 79 tons.
Step-by-step explanation:
A + B = 407
A - B = 249
Cancel b out of the equation, then add the rest.
2A = 656, A=328 tons
A + B = 407, B = 407-328
B = 79 tons
Negative numbers.
Any number below zero is a negative number
Answer:
15.7 units²
Step-by-step explanation:
The sector area is 50/360 times the area of the circle (since the central area of a complete circle is 360° and that for the sector is 50°), or
Sector area = (50/360)(3.14)(6 units)² = 15.7 units²
Answer:It's 18
Step-by-step explanation:Multiply 7 and 6 to get 42
Subtract 10 from 13 to get 3
Divide 42 by 3 to get 14
Add 14 and 4 to get 18