1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Helga [31]
4 years ago
12

Derek and Donnie mow 15 lawns over two 2 days. If Derek mows 3 lawns per hour and Donnie mows 2 lawns per hour, write an equatio

n in standard form that models this.
Mathematics
1 answer:
fenix001 [56]4 years ago
4 0

Answer:the two equations that model the situation are

x + y = 48

3x + 2y = 15

Step-by-step explanation:

Let x represent the total number of hours that Derek worked.

Let y represent the total number of hours that Donnie worked.

Derek and Donnie mow 15 lawns over two 2 days. There are 24 hours in a day. Therefore, the number of hours in 2 days would be 2 × 24 = 48 hours. Therefore

x + y = 48 - - - - - - - - - -1

If Derek mows 3 lawns per hour and Donnie mows 2 lawns per hour, it means that

3x + 2y = 15 - - - - - - - - - 2

You might be interested in
N someone help me withs ASAP
xxMikexx [17]

Answer:

I believe it's the second one

Step-by-step explanation:

The greatest common factor of 44 and 40 is four, so 4 times 11 is 44 and 4 times 10 is 40. that gives you 44 + 40

3 0
3 years ago
Read 2 more answers
A survey of middle school students asked: What is your favorite winter sport? The results are summarized below:Favorite Winter S
Annette [7]

Answer:

a) 31.38%

b) 28.44%

c) 33.33%

d) 73.46%

e) 53.89%

Step-by-step explanation:

<h3>(See picture attached for sub-totals) </h3>

a) What is the probability of selecting a student whose favorite sport is skiing?

P = 171/545 = 0.3138 = 31.38%

b) What is the probability of selecting a 6th grade student?

P = 155/545 = 0.2844 = 28.44%

c) If the student selected is a 7th grade student, what is the probability that the student prefers ice-skating?

P = 70/210 = 0.3333 = 33.33%

d) If the student selected prefers snowboarding, what is the probability that the student is a 6th grade student?

P = 155/211 = 0.7346 = 73.46%

e) If the student selected is an 8th grade student, what is the probability that the student prefers skiing or ice-skating?

P = 180/(171+163) = 180/334 = 0.5389 = 53.89%

7 0
4 years ago
PLEASE HELP THIS IS URGENT!
trasher [3.6K]

Answer:

3, 3 x 3 is 9 ( maybe)......

4 0
3 years ago
2. 2(x+1.25) = 3.5
dangina [55]

Answer:

x = 0.5

Step-by-step explanation:

Given

2(x + 1.25) = 3.5 ← divide both sides by 2

x + 1.25 = 1.75 ( subtract 1.25 from both sides )

x = 0.5

8 0
4 years ago
Read 2 more answers
Chad casts a shadow that is 14.3 feet long. The straight-line distance from the top of Chad’s head to the end of the shadow crea
Elan Coil [88]
Imagine right triangle with first leg to be the Chad length and second leg to be the Chad's shadow. Second leg has length 14.3 ft and since t<span>he straight-line distance from the top of Chad’s head to the end of the shadow creates a 23° angle with the ground, you could consider the trigonmetric function
</span>
\tan 23^{\circ}= \dfrac{\text{Chad's length}}{\text{Chad's shadow length}},

then \tan 23^{\circ}= \dfrac{\text{Chad's length}}{14.3}, \\ \text{Chad's length}=14.3\cdot \tan 23^{\circ}=6.1.<span />
4 0
3 years ago
Other questions:
  • Find the unit rate for 36 feet:6 seconds
    15·1 answer
  • Dori filled her car with 26.5 gallons at the start of her trip. Upon arrival she
    8·2 answers
  • *<br> What is a degree two polynomial function called?
    13·1 answer
  • How to rewrite -20/5
    11·2 answers
  • Sketch the graph of the following equations:<br> y = |3x +5|
    15·1 answer
  • What is the value of x in 1.5=x+0.25
    5·1 answer
  • Help please WILL GIVE BRAINLEIST
    7·1 answer
  • When the product of 6 and the square of a number is increased by 5 times the number, the result is 4.
    15·1 answer
  • Grace's exercise programme requires that she does 1 sit-up on the first day, 2 sit-ups on the second day, 6 sit-ups on the third
    13·1 answer
  • Pls look at photos I’ll give 30 points
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!