Question 3(Multiple Choice Worth 4 points)

Mathematics

1 answer:

PilotLPTM [1.2K]3 years ago

4 0

Answer:

$\large\boxed{\left(-\dfrac{6}{5},\ -\dfrac{8}{5}\right)}$

Step-by-step explanation:

$\left\{\begin{array}{ccc}2x+y=-4&(1)\\y=3x+2&(2)\end{array}\right\qquad\text{substitute (2) to (1)}\\\\2x+(3x+2)=-4\\2x+3x+2=-4\qquad\text{subtract 2 from both sides}\\5x=-6\qquad\text{divide both sides by 5}\\\boxed{x=-\dfrac{6}{5}}\qquad\text{put it to (2)}\\\\y=3\left(-\dfrac{6}{5}\right)+2\\\\y=-\dfrac{18}{5}+\dfrac{10}{5}\\\\\boxed{y=-\dfrac{8}{5}}$

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How much would $400 be worth after 6 years if it was invested at 2% interest compounded annually

Alexxx [7]

P=400 (your amount invested)
r=.02 (rate as a decimal)
n=1 (number of times compounded per year, annually meaning 1)
t=6 (number of years invested)

you must follow orders of operations when you plug these things in your calculator.
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4 0

2 years ago

Read 2 more answers

PLZ ANSWER ASAP WILL GIVE 50PTS if u explain and mark brainliest!!!!!!!

Vinil7 [7]

Answer:

Step-by-step explanation:

$\frac{5q+5p}{2} = 3+4p\\5q+5p = 6+8p \\5q = 6 +3p \\q = \frac{6+3p}{5} ( a=3,b=6,c=5)$