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25.02.2021 •
Mathematics
4x + 5y = 22
7x - 3y = -32
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Ответ:
x = -2
y = 6
Step-by-step explanation:
i multiplied the 1st equation by 3 and the 2nd by 5 to get the y-terms to zero out
12x + 15y = 66
+ 35x - 15y = -160
47x = -94
x = -94/47
x = -2
substitute -2 for 'x' to solve for 'y':
4(-2) + 5y = 22
-8 + 5y = 22
5y = 30
y = 6
Ответ:
First determine the shape of the bases: round, square, triangular, hexagonal, or something else. Find the formula for the cylinder or prism that matches the shape. Then measure the bases to get the numbers needed for the formulae-- so you can compute the areas of the base times height. Plug in the numbers, compute and compare the results.