Answer:
40/.40 = 100
You can buy 100 pounds of food.
Step-by-step explanation:
Answer:
x = 4 and y = -3
Question;
Me pueden ayudar a resolver por método de sustitución porfa.
Translation: Can you help me to solve by please substitution method.
{5x+7y=-1
{-3x+4y=-24
Step-by-step explanation:
Given the simultaneous equation.
5x+7y=-1 .....1
-3x+4y=-24 .....2
From equation 2, making y the subject of formula.
4y = -24 + 3x
y = (-24+3x)/4 ...... 3
Substituting the equation 3 into equation 1
5x+7((-24+3x)/4) = -1
Multiply through by 4
20x + 7(-24+3x) = -4
20x - 168 + 21x = -4
41x -168 = -4
41x = -4 + 168
41x = 164
x = 164/41 = 4
x = 4
Substituting x = 4 into equation 3
y = (-24+3(4))/4
y = (-24+12)/4
y = -12/4
y = -3
743 u should do the divide by three trick
Answer:
x = 4
Step-by-step explanation:
Subtract 1 from both sides:
10x = 40
Divide both sides by 10:
x = 4
I accept that θ in second quadrant, therefore sinθ > 0, cosθ < 0 and tanθ < 0.
