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Shtirlitz [24]
3 years ago
13

Solve the system of equation by adding or subtracting. x+4y=4 3x-4y=-4

Mathematics
2 answers:
Alecsey [184]3 years ago
8 0
X=<span><span><span>43</span>y</span>+<span><span>−4</span><span>3 hope this helped</span></span></span>
pychu [463]3 years ago
4 0
When solving for X
~Add -4 to both sides
X+4Y=4
-4. -4
---------------
X=-4y+4

~add 4 to both sides
3x-4y+4=-4+4
3x=4y-4
~divide both sides by three
3x=4y-4
--- ------
3. 3
X=3\4+ -4\3

When solving for Y
~add -x to both sides
x+4y+-x=4+-x
4y=-x+4
~divide both sides by 4
4yy=-x+4
----- ------
4. 4
Y=-1\4x+1

3x-4y=-4
~add -3x to both sides
3x-4yy+-3x=-4+-3x
-4y=-3x-4
----- -------
4. 4
Y=3\4x+1
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Which is a factor of the polynomial f(x) = 6x4 – 21x3 – 4x2 + 24x – 35?
QveST [7]
<span>I note that this problem starts out with "Which is a factor of ... "  This implies that you were given several answer choices.  If that's the case, it's unfortunate that you haven't shared them.

I thought I'd try finding roots of this function using synthetic division.  See below:

f(x) = 6x^4 – 21x^3 – 4x^2 + 24x – 35
Please use " ^ " to denote exponentiation.  Thanks.

Possible zeros of this poly are factors of 35:  plus or minus 1, plus or minus 5, plus or minus 7.  Use synthetic division; determine whether or not there is a non-zero remainder in each case.  If none of these work, form rational divisors from 35 and 6 and try them:  5/6, 7/6, 1/6, etc.

Provided that you have copied down the function 
</span>f(x) = 6x^4 – 21x^3 – 4x^2 + 24x – 35  properly, this approach will eventually turn up 1 or 2 zeros of this poly.  Obviously it'd be much easier if you'd check out the possible answers given you with this problem.

By graphing this function, I found that the graph crosses the x-axis at 7/2.  There is another root.

Using synth. div. to check whether or not 7/2 is a root:

         ___________________________
7/2   /   6    -21    -4    24    -35
                   21      0   -14     35           
        ----------- ------------------------------
           6        0     -4    10       0

Because the remainder is zero, 7/2 (or 3.5) is a root of the polynomial.  Thus, (x-3.5), or (x-7/2), is a factor.

7 0
2 years ago
Read 2 more answers
Which answer best describes how to solve this story problem? Mark bought 5 bags of red apples with 6 apples in each bag. He boug
Tomtit [17]
The answer is A.

5 × 6 = 30
4 × 5 = 20
30 - 20 = 10

so there are ten more red apples so A is the answer
5 0
3 years ago
Sherri saves nickels and dimes in a coin purse for her daughter. The total value of the coins in the purse is $0.95. The number
forsale [732]
I’m guessing that this is for systems of equations?
n - nickels
d - dimes

These are the equations you start off with.
n = 5d-2
0.95 = 0.10d+0.05n

Substitute the top equation for n into the variable n in the bottom equation.
0.95 = 0.10d+0.05(5d-2)

Solve for d.
0.95 = 0.10d+0.25d-0.10
1.05 = 0.35d
3 = d

Substitute d into the top equation and solve for n.
n = 5(3)-2
n = 15-3
n = 12

There are 3 dimes and 12 nickels in the coin purse! Hope this helped <3

7 0
2 years ago
Read 2 more answers
Hello I need help with question B and C
Tanzania [10]

Answer: a) 22.94 psi

               b) 5.93 X 10 --5

Step-by-step explanation:

a)The pressure at which will trigger a warning is

31 - 31*0.26 = 22.94 psi

b) The probability that that the TPMS will trigger warning at 22.94 psi, given that tire pressure has a normal distribution with average of 31 psi and standard deviation of 2 psi

where x = 22.94,

do not nothe rest

6 0
3 years ago
15,30, 60,... Find the 6th term.​
kolbaska11 [484]

Answer:

15, 30, 60, 120, 240, <u>480</u>.

Step-by-step explanation:

You multiply the numbers by 2 to get to the next number.

For example, 15*2 is 30. 30*2 is 60. 60*2 is 120, etc..

7 0
2 years ago
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