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mr_godi [17]
3 years ago
5

An easy question all wrong or unhelpful or no-work answers will be reported.

Mathematics
1 answer:
boyakko [2]3 years ago
8 0
Substitution:
2x + (6(1/2x - 6)) = 19
2x + 3x - 36 = 19
5x - 36 = 19
+ 36
5x = 55
÷ 5
x = 11

y = (1/2 × 11) - 6
y = 5.5 - 6
y = -0.5

Elimination:
y = 1/2x - 6
- y
0 = 1/2x - 6 - y
+ 6
1/2x - y = 6

3x - 6y = 36
2x + 6y = 19
(add)
5x = 55
÷ 5
x = 11

y = (1/2 × 11) - 6
y = 5.5 - 6
y = -0.5

I hope this helps! Let me know if you need me to explain why I did some things :)

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In the standard (x,y) coordinate plane, point M with coordinates (5.4) is the midpoint of AB, and B has coordinates (7.3). What
SSSSS [86.1K]
(3,5) as x+7/2=5 and y+3/2=4
4 0
3 years ago
There are 140 legs on a planet zids have 5 legs and zods have 7 legs h=how many soulutions are there
abruzzese [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
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8 0
3 years ago
How do you know that the value of D will decrease when the value of N increases?
zlopas [31]
<h2>Explanation:</h2>

Hello! Remember you have to write complete questions in order to find good and exact answers. Here I'll assume that you need a relationship between D and N. So we know some facts:

  • As N increases, then D decreases

So this is an inverse relationship. We can write this as:

D\propto \frac{1}{N} \\ \\ \\ \boxed{D=k\frac{1}{N}} \\ \\ \\ \text{Where k is a positive constant}

Since N lies in the denominator, as it increases then D will decrease. So this is a correct relationship

5 0
3 years ago
Y−5=23(x+4) what is the slope of this equation please
lara [203]

Answer:

The slope of the equation is 23

Step-by-step explanation:

First, we must simplify/solve the equation in order to find the slope

Let's get rid of the parentheses

y - 5 = 23x + 92

Then, combine like terms by moving 5 to the right side of the equation

y - 5 + 5 = 23x + 92 + 5

y = 23x + 97

The slope is always the number that is paired with "x"

5 0
2 years ago
Read 2 more answers
It cost $15 dollars to send 3 packages though a certain shipping company. Consider the number of packages per dollar. find the c
Alex17521 [72]

Answer:

5/1

Step-by-step explanation:

15/3=5=5/1

4 0
3 years ago
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