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3 years ago

What is the solution of this linear system? A. B. C. D. E.

Mathematics

1 answer:

andreyandreev [35.5K]3 years ago

4 0

Answer:

Step-by-step explanation:

Only B (14,10,8) satisfies all three equations.

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For the following equation, what would you do first? -8n+4(1-5n)=-6n-14

Mkey [24]

Answer:

1-5n

Step-by-step explanation:

you would do 1-5n because its in brackets, the order of opperation is

Brakcets

Order (Power ofs)

Division and Mulitplication

then do addition and subtraction

when doing division and multiplication and subtraction and addition go left to right to find what part goes 1st.

Hope this helped!

4 0

3 years ago

The quadratic functions f(x) and g(x) are described as follows:

mihalych1998 [28]

Given:

f(x) and g(x) are two quadratic functions.

$f(x)=-8x^2-7$

The table of values for the function g(x) is given.

To find:

The statement that best compares the maximum value of the two functions.

Solution:

We have,

$f(x)=-8x^2-7$

Here, the leading coefficient is -8 which is a negative number. So, the function f(x) represents a downward parabola.

We know that the vertex of a downward parabola is the point of maxima.

The vertex of a quadratic function $f(x)=ax^2+bx+c$ is:

$Vertex=\left(\dfrac{-b}{2a},f(-\dfrac{b}{2a})\right)$

In the given function, $a=-8,b=0,c=-7$ .

$-\dfrac{b}{2a}=-\dfrac{0}{2(-8)}$

$-\dfrac{b}{2a}=0$

Putting $x=0$ in the given function, we get

$f(0)=-8(0)^2-7$

$f(0)=-7$

So, the vertex of the function f(x) is at (0,-7). It means the maximum value of the function f(x) is -7.

From the table of g(x) it is clear that the maximum value of the function g(x) is 6.

Since $6>-7$ , therefore g(x) has a greater maximum value than f(x).

Hence, the correct option is C.

8 0

3 years ago

Read 2 more answers

A/3 -7=15 im confused for my son

Butoxors [25]

Answer: a = 22

Step-by-step explanation: First isolate a/3 by adding 7 to both sides of the equation. That gives you a/3 = 22.

From here since a is being divided by 3, multiply both sides of the equation by 3 so a = 66. We can check our answer by substituting a 66 back in for a in the original equation and we have $\frac{66}{3} - 7 =15$ or 22 - 7 = 15 or 15 = 15. Since this is a true statement, our answer checks.