Answer:
x=6 and y=4
Step-by-step explanation:
Let's solve your system by elimination.
−x+3y=6; x+3y=18
−x+3y=6
x+3y=18
Add these equations to eliminate x:
6y=24
Then solve6y=24for y:
6y=24
(Divide both sides by 6)
y=4
Now that we've found y let's plug it back in to solve for x.
Write down an original equation:
−x+3y=6
Substitute 4 for y in−x+3y=6:
−x+(3)(4)=6
−x+12=6 (Simplify both sides of the equation)
−x+12+−12=6+−12 (Add -12 to both sides)
−x=−6
(Divide both sides by -1)
x=6
Answer:
x=6 and y=4
Hope this helps! :)
(ﾉ◕ヮ◕)ﾉ*:･ﾟ✧
μ = mean = 10.72 oz
σ =standard deviation = 0.14
x = 10.5
First, find the z-score:
z = x - μ / σ
z = (10.5 - 10.72) / 0.14 = -1.57143
Then find the value on the z-score table:
P (x < 10.5) = 0.058042
Answer:
Step-by-step explanation: use PEMDAS parenthesis first but don't add the numbers with x with a normal number, add x number with x number and add normal number with normal number but parenthesis first good luck
Answer:
-7 i hope this right
Step-by-step explanation:
Find the Greatest Common Factor (GCF).
GCF = 44
2 Factor out the GCF. (Write the GCF first. Then, in parentheses, divide each term by the GCF.)
4(\frac{4r}{4}-\frac{28}{4})4(
4
4r
−
4
28
)
3 Simplify each term in parentheses.
4(r-7)4(r−7)
Number of zids=x
number of zods=y
number of zid legs=5x
number of zod legs=7y
so
5x+7y=140
try to get it into slope intercept from so you can graph is (y=mx+b)
5x+7y=140
subtract 5x from both sides
7y=140-5x
divide both sides by 7
y=20-5/7x
y=-5/7x+20
plug in numbers for x and get numbers for y (you can only plug in multiples of 7 for x so that there are a whole number of zids and since you are counting, x and y must never be negative)
lets try 0 for x
y=-5/7(0)+20
y=20
so x=0 and y=20 is an answer (if you can have only one of that species)
lets try 7 for x
y=-5/7(7)+20
y=-5+20
y=15
so x=7 and y=15 is an answer
lets try 14 for x
y=-5/7(14)+20
y=-10+20
y=10
so x=14 and y=10 is another answer
lets try 21 for x
y=-5/7(21)+20
y=-15+20
y=5
so x=21 and y=5 is another answer
lets try 28 for x
y=-5/7(28)-20
y=-20+20
y=0
so x=28 and y=0 is an answer (if there can be only one of a species)
if we go further, then y will be negative so the answers are
(x,y)
(0,20)
(7,15)
(14,10)
(21,5)
(28,0)
if it is allowed that only one species exists then there are 5 possible answers
if both must exist simultaneously, then there are only 3 answers
<span />
