B 370 11 х с С A find x

1 answer:

svlad2 [7]2 years ago

6 0

Answer:

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Tamiku [17]

by pythagorean formula, the last side is √(61)

by cos rule

cos A

$= \frac{ {6}^{2} + 61 - {5}^{2} }{2 \times 6 \times \sqrt{61} } \\ = \frac{72}{12 \sqrt{61} } \\ = \frac{6}{ \sqrt{61} }$

A = 39.81

5 0

3 years ago

makvit [3.9K]

-2x-y=3 ...(1)
x+2y=4 ...(2)
multiply (2) by 2 and add to (1)
-2x-y+2x+4y=3+8
3y=11
y=11/3
from (2)
x=4-2y=4-2(11/3)
or x=4-(22/3)
=(12-22)/3=-10/3

3 0

3 years ago

ss7ja [257]

X=7 over 8 or 0.875 is the answer

8 0

3 years ago

mojhsa [17]

Answer:

14x15-10x10=110

A=110

Step-by-step explanation:

8 0

2 years ago

kakasveta [241]

The 15-year old age group has the lower ratio (15years = 7:10. 16yr = 10:19

6 0

3 years ago