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3 years ago

Can you help me with all of them

Mathematics

1 answer:

Westkost [7]3 years ago

3 0

Well i numbered them across the top row then bottom 1-18...I got "shoots his mouth off" with no answer for #6 n+12 (blank space i presume and no answer for #15 x/3.

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Jonathon has a bag full of 14 balls to sell. He sells the baseballs for $2 dollars and the volleyballs for $5 and earns a total

olga55 [171]

X+Y=14
2x+5y=43
Those are the equations

7 0

3 years ago

Read 2 more answers

Two times x is 8 more than y. The sum of x and two times y is 14. Write two equations and graph to find the value of y.

Sauron [17]

Option B: $y=4$ is the value of y

Explanation:

It is given that "Two times x is 8 more than y". Writing it as expression, we have,

$2x=8+y$

It is also given that "The sum of x and two times y is 14". Writing it as expression, we have,

$x+2y=14$

To find the value of y, let us solve the two equations using substitution method.

From the equation $2x=8+y$ , let us find the value of x.

$x=\frac{8+y}{2}$

$x=\frac{8}{2} +\frac{y}{2}$

$x=4+\frac{y}{2}$

Now, substituting $x=4+\frac{y}{2}$ in the equation $x+2y=14$ , we get,

$4+\frac{y}{2}+2y=14$

$4+\frac{5y}{2} =14$

$\frac{5 y}{2}=10$

$5y=20$

$y=4$

Thus, the value of y is $y=4$

8 0

3 years ago

Can anyone help me on this please?

romanna [79]

Answer:

x = 6

y = 12

z = 12√2

Step-by-step explanation:

3 0

3 years ago

Suppose that A and B are square matrices and that ABC is invertible. Show that each of A, B, and C is invertible.

Murljashka [212]

Answer:

You can proceed as follows:

Step-by-step explanation:

Suppose that the matrix $ABC$ is invertible, and suppose that at least one of the matrices $A,B,C$ is not invertible. Without loss of generality suppose that the matrix $A$ is not invertible. Remember the important result that a matrix is invertible if and only if its determinant is nonzero. Then,