Answer:
C im pretty sure 7.02 and 0.34
Step-by-step explanation:
Answer:
i think x = 7 y = 11
Step-by-step explanation:
have a nice dae
Answer:
Check the answer once....
Answer:
x = -5
y = 2
Step-by-step explanation:
3x + 4y = -7 -------eqn 1
-3x - 8y = -1 ------eqn 2
First, let's take eqn 1, to find the value of y
3x + 4y = -7
Make y the subject of the formula
4y = -7 - 3x
Divide both sides by 4, to get y
4y/4 = -7 - 3x / 4
y = (-7 - 3x) / 4
Substitute y into eqn 2
-3x - 8y = -1
-3x - 8(-7 - 3x) / 4 = -1
Open the bracket with -8
-3x + (56 + 24x )/ 4 = -1
LCM = 4
(-12x + 56 + 24x) / 4 = -1
(-12x + 24x + 56) / 4 = -1
(12x + 56)/4 = -1
Cross multiply
12x + 56 = -4
12x = -4 -56
12x = - 60
Divide both sides by 12 , the get the exact value of x.
12x/12 = -60/12
x = - 5
Insert the value of x = -5 into the equation 1
3x + 4y = -7
3(-5) + 4y = -7
-15 + 4y = -7
4y = -7 + 15
4y = 8
Divide both sides by 4
4y/ 4 = 8/4
y = 2
Hint, to confirm if the values are correct
Pick any of the two eqns
Let's pick eqn 2.
-3x - 8y = -7
x = -5
y = 2
-3(-5) - 8(2) =
= 15 - 16
= -1
So therefore, our values are correct
Answer:
There are 40 musicians that are only marching band.
Step-by-step explanation:
Since we knot that there are 25 musicians that do both that means there is 60 - 25 = 35 musicians who do only jazz band. From his we can answer the question because....
100 = a + b + c
Where "a" is the number of musicians who go only to jazz, "b" is the number of people who do both, and "c" is the number of people that go only to the marching band. From here we can do this....
100 = a + b + c
c = 100 - a - b
Substitute the value we found outa and get.....
c = 100 - 35 - 25
c = 40