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slamgirl [31]
3 years ago
13

Evaluate 2x - y + 4z, if x = 1, y = 2 and z = -1

Mathematics
1 answer:
lidiya [134]3 years ago
5 0

2 x 1 - 2 + 4 x -1 =

the answer is -4.

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Find the surface area of the following rectangular prism. Express your answer in square meters. 47.75 m 2 23.88 m 2 26.25 m 2 1,
nevsk [136]

Answer: 47.75

Step-by-step explanation:

I actually went on brainly to search this and all I found was your question with no answers! So, I figured it out myself and got the right answer! 47.75 is in fact, the correct answer! May I have brainliest? Have a nice day!

7 0
2 years ago
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What is an equation of the line that is perpendicular to -x+2y=4 and passes through the point (-2, 1)?
KATRIN_1 [288]
First: Slope of -x+2y=42y=x+4y=x/2+2So, m=1/2.
Second: Slope  of the perpendicular line: mp=-2.
Third: Find the line with slope -2 and passes through the point (−2, 1)y-y1=m(x-x1)y-1=-2(x+2)y=-2x-4+1y=-2x-3 

Read more on Brainly.com - brainly.com/question/7942650#readmore

5 0
2 years ago
What slope of a line that passes through (4, -1) and (2,9)
pickupchik [31]

Answer:

-5

Step-by-step explanation:

The slope is given by

m= (y2-y1)/(x2-x1)

   = (9 - -1)/ ((2 - 4)

   = (9+1)/(2-4)

   = 10/-2

   = -5

3 0
2 years ago
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Which graph represents the solution set of the system of inequalities? {x+y<12 y≥x−4
RSB [31]

Answer: The graph in the bottom right-hand corner

(see figure 4 in the attached images below)

===========================================

Explanation:

Let's start off by graphing x+y < 1. The boundary equation is x+y = 1 since we simply change the inequality sign to an equal sign. Solve for y to get x+y = 1 turning into y = -x+1. This line goes through (0,1) and (1,0). The boundary line is a dashed line due to the fact that there is no "or equal to" in the original inequality sign. So x+y < 1 turns into y < -x+1 and we shade below the dashed line. The "less than" means "shade below" when y is fully isolated like this. See figure 1 in the attached images below.

Let's graph 2y >= x-4. Start off by dividing everything by 2 to get y >= (1/2)x-2. The boundary line is y = (1/2)x-2 which goes through the two points (0,-2) and (4,0). The boundary line is solid. We shade above the boundary line. Check out figure 2 in the attached images below.

After we graph each individual inequality, we then combine the two regions on one graph. See figure 3 below. The red and blue shaded areas in figure 3 overlap to get the purple shaded area you see in figure 4, which is the final answer. Any point in this purple region will satisfy both inequalities at the same time. The solution point cannot be on the dashed line but it can be on the solid line as long as the solid line is bordering the shaded purple region. Figure 4 matches up perfectly with the bottom right corner in your answer choices.

5 0
2 years ago
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HELP ME ANSWER THIS PLEASE!!!!! WILL GIVE BRAINLIEST
Alex777 [14]
Black socks on monday - 3/9 or .33%.
white socks on tuesday - 5/9 or .55%

Explanation: Probability of black socks on Monday:
Total pair of socks: 1 + 3 + 5 = 9
Number of black socks on Monday: 3
3/9 = 1/3 (or divide to get a percentage)

Probability of white socks on Tuesday:
Total pair of socks: 9
Number of white socks on Tuesday: 5
5/9
5 0
2 years ago
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