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Viefleur [7K]
2 years ago
15

What is the value of the expression (30.72 × .05) - 1.42

Mathematics
2 answers:
Alexeev081 [22]2 years ago
8 0

Your answer is 0.116

Step-by-step explanation:

kotykmax [81]2 years ago
7 0

Answer:

0.116

Step-by-step explanation:

(30.72*0.05)-1.42\\1.536-1.42=\\0.116

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Joylin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos
umka2103 [35]

Joylin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. She knows that the total cost to download 3 videos was $12. Her work to find the equation is shown below. Joylin’s Work Step 1 x=3/12=0.25 Step 2 y=0.25x Where did Joylin make her first error? Joylin divided 3 and 12 instead of multiplying the two numbers. Joylin computed the decimal equivalent of 3/12 incorrectly. Joylin used 0.25 as the coefficient of x instead of a product of x and y. Joylin switched the numerator and the denominator when she found k.

Solution:


Joylin switched the numerator and the denominator when she found k.

Joylin should divide 12/3 and not 3/12. As, y is total cost and x is number of videos.

For x=1, number of videos=1, y,or total cost=1*4=4,

For x=2,y=2*4=8

For x=3, y=3*4=12

So, the constant, k=4

So, Answer: Option (D)

Joylin switched the numerator and the denominator when she found k.

4 0
3 years ago
Read 2 more answers
A proportional relationship between the number of pounds of potatoes (x) and the price in dollars (y) is graphed, and the ordere
sergeinik [125]

Answer:

Part A: The price for one pound is 0.75.

Part B: The ordered pair (8, 6) on the graph represents the pound of potatoes and the price for 2.

5 0
2 years ago
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What is the domain of the function y=√x+4?
vfiekz [6]

Answer:

4

Step-by-step explanation:

7 0
3 years ago
BRAINLIEST!!!<br> 11. Solve the inequality and graph the solution on a number line.
PilotLPTM [1.2K]

Answer:

y≤-1/3 (fraction)

And on the number line it will start from -1/3 (-0.333) and go less than -1/3 ( to the left, and it will be shaded

Step-by-step explanation:

First we expand the brackets, making it -15y+12≥17

Then we move 12 to the other side, making it negative, -15y≥17-12

Simplify, -15y≥5

Then we divide on both sides to isolate y, flipping the greater than sign to less than because when you divide or multiply by a negative number, the sign flips. y≤5/-15

Then we simplify by dividing the fraction by 5, making it -1/3. y≤-1/3

If you have any doubts, inform me

7 0
3 years ago
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Please help me! ASAP
Allushta [10]

Answer:

18-x

Step-by-step explanation:

|x-18| = x-18, if x-18 > 0 <=> x > 18

|x-18| = 18-x, if x-18 < 0 <=> x < 18

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