2x + 4y = 14.....multiply by -3
3x + 12y = 51
----------------
-6x - 12y = - 42 (result of multiplying by -3)
3x + 12y = 51
----------------add
-3x = 9
x = -9/3
x = -3
2x + 4y = 14
2(-3) + 4y = 14
-6 + 4y = 14
4y = 14 + 6
4y = 20
y = 20/4
y = 5
solution is (-3,5)
Answer:
Answer:
h = 6 m
s = 7.81025 m
a = 10 m
e = 9.27362 m
r = 5 m
V = 200 m3
L = 156.205 m2
B = 100 m2
A = 256.205 m2
Step-by-step explanation:
Answer:
<em>Addison worked 5 hours</em>
Step-by-step explanation:
<u>Proportions
</u>
A direct proportion is a relation between variables where their ratio is a constant value. This means that if y and x are proportional, then:
y = kx
Where k is the constant of proportionality.
The relationship between the number of kilograms of dough Addison prepares (y) is proportional to the number of hours he works on it (x).
Knowing he prepared y=30 kilograms of dough after t=3 hours, we substitute in the function:
30 = 3k
Solving for k:
k = 30/3 = 10
The relationship is:
y = 10x
If he prepared y=50 kg of dough, then:
50 = 10x
Solving for x
x = 50/10 = 5
Addison worked 5 hours
Answer:
that's a pentagon
Step-by-step explanation:
it just is yo