1/2 x base x height
1/2 x 6 x 8 = 24 (a)
272,600,000 to standard form is 2.726(10^8)
Answer:
There are 15 koi
Step-by-step explanation:
koi: goldfish : total
3 11 14
There are 70 fish total
70/14 = 5
Multiply each term by 5
koi: goldfish : total
3*5 11*5 14*5
15 55 70
There are 15 koi
By Cosine Rule:
CosT = (s² + r² - t²) /(2sr)
<span>CosT = (10² + 11² - 7²) /(2*11*10)
</span>
<span>CosT = 172 /220 </span>≈ 0.7818
T = Cos⁻¹(0.7818)
T ≈ 38.57°
T ≈ 38.6°
9514 1404 393
Answer:
x
Step-by-step explanation:
There is already an expression given for x, so that is the easiest variable to substitute for.
Substituting for x using the second equation, you have ...
-3(-2y+14) +y = -14
6y -42 +y = -14
7y = 28
y = 4
x = -2(4) +14 = 6
The solution is (x, y) = (6, 4).
_____
Substitution for x is the easiest.
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The first equation could be rearranged to give an expression for y:
y = 3x -14
Then that can be used to substitute for y in the second equation. My lazy brain judges that to be more work.
