Answer:
x=2/5, y=-3. (2/5, -3).
Step-by-step explanation:
10x+3y=-5
-5x-4y=10
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10x+3y=-5
2(-5x-4y)=2(10)
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10x+3y=-5
-10x-8y=20
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-5y=15
y=15/-5
y=-3
10x+3(-3)=-5
10x-9=-5
10x=-5+9
10x=4
x=4/10=2/5
Answer:
18 students
Step-by-step explanation:
I TOOK THE TEST Pls mark brainliest...
Answer:
100 square inches
Step-by-step explanation:
A square painting has a side length of 10 inches. What is the area of the painting?
Area of square: side * side
Substitute the side length (10) into the formula
10 * 10 = area
area = 100
Thus, the answer is 100 square inches
I hope this helps! Feel free to ask any questions!
Answer: 9 meters
Step-by-step explanation:
A line between two opposite corners splits the floor into two right angled triangles, therefore we can use Pythagoras’ Theorem which is:
a^2 + b^2 = c^2
where c is the hypotenuse, and a and b are the other two sides.
Hypotenuse in this question is 15 metres while one side is 12 metres. The length will now be:
a^2 + b^2 = c^2
12^2 + b^2 = 15^2
b^2 = 15^2 - 12^2
b^2 = 225 - 144
b^2 = 81
b = ✓81
b = 9m
The length of the storage unit is 9m
10 children cuz those seven sons are siblings so they would have the same sisters