The trick is to write appropriate equations and then solve the system of equations you've created.
"sum of two numbers is -5:" x + y = -5
"difference is -1:" x-y = -1
Add these two equations together. This will cause y to drop out, and you will be left with an equation in x alone:
2x = - 6, so x = -3. Subst. -3 for x in either equation, above, and find the corresponding y value.
Then write your solution as (-3, y ) (write in your value for y).
Quadrilaterals are shapes with 4 sides. The correct inequality expression is x < 11
<h3>What are quadrilaterals?</h3>
Quadrilaterals are shapes with 4 sides. The given figure is a quadrilateral. The side opposite to 68 degrees is greater than the side opposite 32 degrees to have the equation;
11x - 33 < 77
Add 33 to both sides
11x - 33 + 33 < 77 + 33
11x <110
x < 110/10
x< 11
Hence the correct inequality expression is x < 11
Learn more on inequality here: brainly.com/question/24372553
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Answer: 250 ≤ 100+5x
150≤5x divide by 5
30≤x
It will take 30 weeks to earn enough.
Step-by-step explanation:
Answer:
160.14m²
Step-by-step explanation:
Area of circle = πr² = 3.14r²
Area of sidewalk = area of outer circle - area of inner circle
a = 3.14 * 10² - 3.14 * 7²
a = 3.14 * 100 - 3.14 * 49
a = 314 - 153.86
a = 160.14
160.14m²