Please hurry, this is the last time I can take this assessment

Answer:

Step-by-step explanation:

Given system:

Substitute z in the first two equations with z = 3 - kx:

In order the two equations above not to have a solution, the lines should be parallel. Parallel lines have equal slopes.

Solve the following equation for k:

Answer: -7

Step-by-step explanation:

−7

=−7

Answer:

{s | s < -8 or s >= -2}

Step-by-step explanation:

In order to solve an inequality we simply have to isolate the variable by applying the opposite operations on each side.

s - 2  <  -10   ... add 2 to both sides

s  <  -8

-3s  <=  6   ... divide both sides by -3, since we are dividing a negative number you must flip the sign

x >= -2

Therefore the final answer would be {s | s < -8 or s >= -2} which is the 3rd graphed multiple choice answer as seen attached to this answer.

Answer:

I think 15 I dont see it in the options but im going to explain my answer

Step-by-step explanation:

4 + 4 = 8, 13 - 8 = 5 x 6 = 30 divided by 2 is 15

SO 8 x 13 = 104 - 15 = 89 so therefore its 89!

Answer:

The average rate of change is two feet per second.

Step-by-step explanation:

The height of an arrow shot up into the air from a height of three feet is given by the function:

[tex]h(t)=-2t^2+12t+3[/tex]

And we want to find its average rate of change from one second the four seconds.

The average rate of change is synonymous with the slope. Therefore, we can evaluate the height of the arrow after the first and fourth seconds, and find the slope between them.

After the first second, the height of the arrow is:

[tex]h(1)=-2(1)^2+12(1)+3=13[/tex]

And after the fourth second, the height of the arrow is:

[tex]h(4)=-2(4)^2+12(4)+3=19[/tex]

This yields two points: (1, 13) and (4, 19).

The slope between them is:

[tex]\displaystyle m=\frac{19-13}{4-1}=\frac{6}{3}=2[/tex]

Therefore, the average rate of change from one second to four seconds is two feet per second.

Answer:

A) would be the answer

Step-by-step explanation:

this is the answer because 2 groups with 10 blocked all together has to have 5 blocks each group, also 5+5=10

Answer:

£32

Step-by-step explanation:

12 + 4(5) = 32

Stay safe! <3

Answer:

x = 2.55 miles per day

Step-by-step explanation:

In English:     5 days * 'x' miles per day = 12 & 3/4 miles total

In algebra:    5x = 12.75

                       x = 12.75 ÷ 5

                      x = 2.55 miles per day

Answer:

g(x) = 1/(x-9)  - 4

Step-by-step explanation:

f(x) shift 9 units right -> f(x-9) = 1/(x-9)

further shift 4 units down: 1/(x-9) - 4

2 litres of water. A

Eric's drink 2 liters of water.

" Liter is a basic unit which is used to measure volume of any liquid."

According to question,

Capacity of one water bottle = 500mL

Capacity of 4 water bottles = [tex]500[/tex] × [tex]4[/tex]

                                              = 2000mL

1000mL = 1Liter

2000mL =2L

Hence we conclude that Option A is correct.

Learn more about Liters of water here

https://brainly.com/question/22384228

#SPJ2

Answer:

the answer is

T¹=5s

T²=1s

Am not sure about why there's two times , although perhaps the two times indicate the starting time and the other indicate the time when the stone hits 25m above the ground

Step-by-step explanation:

the solving steps are in the picture.

Answer:

Step-by-step explanation:

Side-angle-side.

Answer:

It equals 57 centiliters.

Step-by-step explanation:

The reason why is because any number that has a 0 is subtracted to less without the 0, so for example lets say 1,680 milliliters equal how many centiliters the answer would be 1,680. Take out the 0 out of any number u add to if you want to know the centiliter

Answer: 57

Step-by-step explanation:

We can set up a proportion to solve for the number of centiliters.

1ml/ 570ml = 0.1 centiliter/ xcentiliter

Now, we cross multiply to solve for our unknown x:

x centiliter ≈ 570 ml / 1 ml * 0.1 centiliter → x centiliter ≈ 57.0 centiliter

Conclusion:

570ml ≈ 57.0 centiliter

Answer:

9.6(x)= 27.36 27.36÷9.6=x x=2.85

Answer:

C because to get y u do 180 - 57+61 than for x u do 180 - 62+67

Answer:

x=51

Step-by-step explanation:

y+57+61=180 linear pair

y=180-118=62

in triangle

x+y+67=180sum of interior angle of the triangle is 180

x+62+67=180

x=180-129=51

Answer:

25.6

Explanation:

t = 2 seconds

h = 8 + 40.8(2) - 16(2)^2

Solve for h by simplifying both sides of the equation, then isolating the variable.

h = 25.6

Answer:

50 miles per gallon, 50/1

Step-by-step explanation:

Answer:

Just tell her and if she says you dont tell her that you do. If she continues to hurt you then probaly call the police.

Step-by-step explanation:

Answer:

try to find someone close to you like a relative or best freind and tell them about her. After that try to confront her about it, and bring that close one with you to make you feel more strong. if she says you dont

have it and contiues hurting you tell the police.

Answer:

f(1) = 3

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Step-by-step explanation:

Step 1: Define

f(x) = 4x - 1

f(1) is x = 1

Step 2: Evaluate

Answer:

[tex]L = 6[/tex] --- Length

[tex]W = 4.5[/tex] --- Width

Step-by-step explanation:

Given

Let: [tex]L = Length; W = Width[/tex]

[tex]Area = 27m^2[/tex]

[tex]L = 2W- 3m[/tex]

Required

Find the dimensions of the rectangle

Area (A) is calculated as:

[tex]A = L * W[/tex]

This gives:

[tex]27 = (2W - 3) * W[/tex]

Open bracket

[tex]27 = 2W^2 - 3W[/tex]

Express as a quadratic function

[tex]2W^2 - 3W - 27 = 0[/tex]

Expand

[tex]2W^2 + 6W - 9W - 27 = 0[/tex]

Factorize:

[tex]2W(W + 3) - 9(W + 3) = 0[/tex]

[tex](2W - 9)(W + 3) = 0[/tex]

This gives:

[tex]2W - 9 = 0\ or\ W + 3 = 0[/tex]

[tex]2W = 9 \ or\ W = -3[/tex]

Width can not be negative.

So:

[tex]2W = 9[/tex]

[tex]W = 4.5[/tex]

Recall that:

[tex]L = 2W- 3m[/tex]

[tex]L = 2 * 4.5 - 3[/tex]

[tex]L = 6[/tex]

Answer:

45

Step-by-step explanation:

Because this is a triangle all angles must add up to 180. so we already know 90 so 180-90=90 and 90/2 = 45. Hope this helps

Step-by-step explanation:

1. Label each side of the Triangle

Using the SOH CAH TOA method we can label zy as H (the longest line is always H). We can label xz as O (it is opposite the angle). We can label xy as A (it's the remaining side).

2. Cross out the 'useless' side

Now, we need to cross out the label which doesn't have an appointed piece of information to it. Meaning that A will remain as it labels 7cm. H will also remain as it labels the angle. O does not label anything and so we can cross it out.

3. Decide which method is correct

We are using the SOH CAH TOA method, this means we can either use SOH, CAH, or TOA to solve the problem. We know which method to use by seeing which of them does not contain the letter we crossed out. CAH does not contain O so it is the correct method.

4. Know the formula

Now we will use the formula of our found method. CAH begins with C and so does Cos. Therefore, Cos is our formula.

Cos( ) = A/H

5. Substitute in your numbers

Then, we will put in our numbers into the formula. The first slot we must fill in is within the brackets. Usually the angle goes inside of the brackets during trigonometry but we obviously do not know it. This means we will use 'x' inside of the brackets. Our formula now looks like this:

Cos(x)

Substitute in A and H. A will be the information appointed to the side we labelled A. H will be the information appointed to the side we labelled H.

Our formula will look like this:

Cos(x) = 7/12

6. Reverse it and calculate

Now we need to input an equation into our calculator. I don't know why but we will need to reverse our previous formula and type it into the calculator as:

cos-^1(7/12)

The result should say 54.31466529.

7. Round

Now we will round it by 1 decimal place. To do this we need to look at the number next to 3, it is not 5 or above 5. This means we will not round up,

 our answer is 54.3 degrees.

Answer:

41

Step-by-step explanation:

(375-6)÷9=369÷9=41

Answer: 41 students were on each bus.

Step-by-step explanation: Subtract the 6 students who traveled in cars from the total students (375 - 6 = 369). Then, divide the 369 students by the 9 buses and get your answer: 41 students per bus.

Answer:

Actual Mean = 43

Step-by-step explanation:

Given Mean = 38

No of observations = 9

we know,

Mean = Sum / N

38 = Sum/ 9

Sum = 38 x 9 = 342

Since the observation 27 was mistakenly taken instead of 72, we subtract 27 from the sum and add 72.

New sum = 342 - 27 = 315 again, 315 + 72 = 387

The no. of observations stays the same.

Actual mean = New Sum / N

= 387/9

=43

Step-by-step explanation:

arithmetic mean =38

n=9

mean=sum/n

sum=mean×n=38×9=342

mistakenly observation 27 is taken instead of 72

new sum becomes =342+72-27=387

now

new mean =new sum/n=387/9=43

the actual mean of the data is 43.

Answer:

to find the area, multiply the base times the height and divide it by two. we do not have the picture of the triangle, so we cannot answer this but here is the formula

(BxH)/2 = A

Answer:

B) 81π units²

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Geometry

Radius of a Circle Formula: r = d/2

Area of a Circle Formula: A = πr²

Step-by-step explanation:

Step 1: Define

Diameter d = 18 units

Step 2: Manipulate Variables

Radius r = 18 units/2 = 9 units

Step 3: Find Area

Answer:

x<14

Step-by-step explanation:

7+7>x by triangle inequality theorem

14>x or x<14

Answer:

Step-by-step explanation:

(-3)ˣ⁻² = -243

(-3)ˣ⁻² = (-3)⁵

x-2 = 5

x = 7