MATHEMATICS HIGH SCHOOL

If x=3 and y=-2 and z=4, what is the value of 3x + 2y - z?

Answers

Answer 1

Answer: $3x+2y-z=3\cdot3+2\cdot(-2)-4=9-4-4=1$

Answer 2

Answer:

3x3=9 -2x2=-4 4-0=4

9+-4-4

ANS. = 1

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Can someone please help me on this math chart and graph above I’ve already posted 3 pictures of it and no one is answering :( I’ll mark as brainliest if you answer. Picture is above thank you.

Answers

the function is x^2-9, so all you have to do is replace x with a number. for example, 2.

so 2^2-9 is -5. the plot would be 2, -5. basically, plug in a number to be the x coord, and whatever number you get will be your y coord.

after you graph a few plots (doing the same thing above), draw a line through all of them.

if the line goes up towards the right top corner, it's increasing. if it goes down the right bottom corner, it's decreasing.

Express 4.26 as a mixed number.

Answers

4 13/50
4 is the whole number because it is a whole number
26/100 can be simplified to 13/50
is this problem a high school problem?

4.26 in mixed number.
4.26 = 426/100 ( improper fraction )
426/100 = 213/50 = 4 13/50 Ans

A lamp is on sale and it's price is reduced from $80 to $50. what is the percentage decrease?

Answers

Percentage change =Final value -Initial value / initial value * 100\
= 50 - 80 / 80 * 100
= -30/80 * 100
= -3/8 * 100
= -300/8
= -37.5%

In short, Your Answer would be -37.5%

Hope this helps!

Use slope and y intercept to graph a line. y=2x-5

Answers

On your graph:

-- Mark a dot on the y-axis, at y = -5 .

-- From there, move 1 unit to the right and 2 units up and make a mark. If this
is too tiny for you, then you can move 7 units to the right and 14 units up, or
11 units to the right and 22 units up ... any way you want to do it, as long as
the distance 'up' is double the distance to the right, because the slope is 2 to 1.
Wherever you wind up, mark a dot.

-- Using your pencil and your ruler, draw a straight line between the two dots you have
marked. You may extend it as far as you wish in either or both directions.

m=2,b=-5 where m is the slope and b is the y-intercept

Simplify this expression (5)^ -5 (5)^ 7 please explain how you got the answer A.1/25
B.25
C.10
D. 5^ -35

Answers

Answer:

$( {5}^( - 5) ) * ( {5}^(7) ) \n \n \frac{ {5}^(7) }{ {5}^(5) } = {5}^(7 - 5) = {5}^(2)$

the answer is b. 25

Jamal discovers that the sum of Point B and Point C is zero. A number line with points A, blank, B, blank, 0, blank, C, D, blank. Which sentence is a correct statement about points B and C?

Answers

Answer:

The answer is B.

Step-by-step explanation:

B is two spaces to the left of the 0, and C is two spaces to the right of the the zero meaning B is the opposite of C.

If I am correct please mark me:)

Answer:

Step-by-step explanation:

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