MATHEMATICS HIGH SCHOOL

Help me pls i need it
help me pls i need it - 1

Answers

Answer 1
Answer:

Answer:

y = 255x + 6559

Step-by-step explanation:

Function Modeling

We have the following relationship between the minutes into the ride (x) and the elevation of the tram (y):

x={2,5,9,14}

y={7069,7834,8854,10129}

We first test if the relationship is linear or not.

A linear relationship is tested by calculating the slope from any pair of points.

Suppose we know the line passes through points A(x1,y1) and B(x2,y2). The slope can be calculated with the equation:

\displaystyle m=(y_2-y_1)/(x_2-x_1)

Selecting the first two points (2,7069) and (5,7834)

\displaystyle m=(7834-7069)/(5-2)=(765)/(3)

m = 255

Selecting the first two points (5,7834) and (9,8854)

\displaystyle m=(8854-7834)/(9-5)=(1020)/(4)

m=255

If we repeat the calculation with any pair of points, we get the same value for the slope, thus we can conclude the relationship is linear.

Using the point-slope form of the line:

y - k = m( x - h )

We select the point (2,7069)

y - 7069 = 255( x- 2 )

Operating:

y - 7069 = 255x - 510

Adding 7069:

y = 255x - 510 + 7069

y = 255x + 6559

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The angle of elevation from L to K measures 55°. If JK = 26, find JL. Round your answer to the nearest tenth.A. 37.1
B. 21.3
C. 14.9
D. 26.8

Answers

the angle of elevation is the degree at which you need to look up, therefore the angle between the dotted line, let's call it LM, and line LK is 5 degrees

Angle JLK and Angle KLM are also complimentary angles, meaning that they both add up to 90 degrees, therefore angle JLK = 90-55=35degrees

Now, SOHCAHTOA comes in handy to find JL. Since we know JLK and JK, this is going to be a breeze.
Since the sides we are using are opposite and adjacent to JLK, we are going to use tan.
So: tan = o/a
however, as we don't know a, we need to rearrange the equation so a is on its own
tan=o/a (times both sides by a)
tan a = o (divide both sides by tan)
a = 0/tan

Now we can solve the equation with the information given
a = 26/tan35
a = 26/0.7
a=37.13184818
=> 37.1

So, you can put down A as your answer :D

Answer:

37.1

Step-by-step explanation:

Solve by substitution
y=x+3
y=2x+5

Answers

y = x+3
y = 2x+5
x+3 = 2x+5
x+8 = 2x
x = 8

I think I did that right, anyway.
y=x+3
y=2x+5

1. Solve for the variable that is easiest to find. 
     In this case I will solve for x.
y=x+3
-3       -3
y-3=x

2. Now plug in (y-3) for x in the other equation.
   y=2(y-3)+5  ~use distributive property 
   y=2y-6+5     ~combine like terms
   y=2y-1
-2y=-2y
  -y=-1             ~multiply both sides by -1
   y=1
 
3. Since you have a value for y you can plug it in to solve for x.
     y=x+3
    1=x+3
    -3    -3
    -2=x

Answers: 
y=1
x=-2

Simplify 3(x-4)+8(x+2)

Answers

3(x - 4) + 8(x + 2)

3*x - 3*4 + 8*x + 8*2

3x - 12 + 8x + 16

3x + 8x - 12 + 16

11x + 16 - 12

11x + 4
The answer is this 11x+4

A delivery truck drove 203 mi in 3.5 h. After unloading and loading new cargo, it traveled on another 243 mi for 4.5 h. What was the average speed of the truck over its entire route? Round to the nearest hundredth, if necessary. 1. 55.75 mi/h
2. 56.00 mi/h
3. 58.00 mi/h PLZ HURRY!!
4. 63.70 mi/h

Answers

The answer is number 1. 
203+243=446
3.5+4.5=8
446/8= 55.75

By using the 20 percent off coupon that she found in the newspaper, Jill saved $4 on the extra large bag of dog food that she bought. what was the cost of the dog food without the coupon?

Answers

The cost of the dog food without the coupon is $20.

What is the percentage?

The Percentage is defined as representing any number with respect to 100. It is denoted by the sign %.

It is given that 4 dollars are 20% of the original price of the dog food. Let's have x be the original price of the dog food.

The cost of the dog food without the coupon is calculated as:-

4=x ( 20 )

To get x alone divide both sides by 20 and solve further.

( 4 / 20 )= ( x ( 20) / 20 )

Solve the above equation by cancelling 20 to get the value of x.

4/20=x

Divide 4 by 20 to get the answer and multiply by the value 100 to get the actual cost of the product.

x = 0.2 x 100 = 20

Therefore, the cost of the dog food without the coupon is $20.

To know more about percentages follow

brainly.com/question/24304697

#SPJ5
well if 20% x 5 is 100%
then $4 x 5 = $20
So without the coupon the dog food costs $20 

love, the Pineapple <3
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The window measured 5ft 6 inches by 2ft 9 inches about how many square inches of plastic would I need to cover the window

Answers

If you convert everything to inches you will get: 66"x33". So multiplying those you get 2176sq inches.
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