![arnold2619](/avatars/47247.jpg)
arnold2619
17.01.2020 •
Mathematics
Justin is working two summer jobs, making $8 per hour babysitting and $14 per hour lifeguarding. last week justin earned a total of $92 and worked 4 times as many hours babysitting as he worked hours lifeguarding. determine the number of hours justin worked babysitting last week and the number of hours he worked lifeguarding last week.
Solved
Show answers
More tips
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
- H Health and Medicine How to perform artificial respiration?...
- H Health and Medicine 10 Tips for Avoiding Vitamin Deficiency...
- F Food and Cooking How to Properly Cook Buckwheat?...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
- L Leisure and Entertainment Carving: History and Techniques for Creating Vegetable and Fruit Decorations...
- P Photography and Videography How to Choose the Perfect Photo Paper for Your Images?...
- H Health and Medicine What vaccines do children need?...
- H Health and Medicine Reasons for the Appearance of Warts: Everything You Need to Know...
Answers on questions: Mathematics
- M Mathematics Which statement is true?...
- M Mathematics Compute utimesu, vtimesu, and StartFraction v times u Over u times u EndFraction using the vectors uequals[Start 2 By 1 Matrix 1st Row 1st Column negative 1 2nd Row...
- M Mathematics Sali throws an ordinary fair 6-sided dice once. a) what is the probability she gets a 6? Tim throws the same dice twice. b) what is the probability he gets a 6 on...
- M Mathematics The average sales per customer at a home improvement store during the past year is $75 with a standard deviation of $12. The probability that the average sales per...
- M Mathematics The quality control company checked 800 cameras for quality . Team found 20 cameras had lens defects , 25 cameras had charging defects and 6 had both defects . What...
- M Mathematics A runner competes in a local marathon. He places 34th which is exactly the top 40% of all runners. How many runners competed...
- M Mathematics UREGENT!! Convert the following equation to logarithmic or exponential form: 9 to the power of negative 2 end exponent equals 1 over 81 Your log subscript negative...
- M Mathematics Each sprinkler head should cover a fourth of a circle and the water shoots out 3 meters, but they found that each sprinkler is only covering 60 degrees and shooting...
- M Mathematics Factor the polynomial 3x4 – 2x2 + 15x2 – 10 by grouping. Which product is the factored form of the polynomial?...
- M Mathematics What is the value of cosθ given that (−2, −3) is a point on the terminal side of θ ?...
Ответ:
The hours Justin babysat is 8 hours and he worked as a lifeguard for 2 hours.
Two equations can be derived from the question:
8x + 14y = 92 equation 1
4y = x equation 2
Where:
x = hours Justin babysat
y = hours spent lifeguarding
In order to determine the value of y, substitute for x in equation 1:
8(4y) + 14y = 92
32y + 14y = 92
46y = 92
y = 92/46
y = 2 hours
Substitute for y in equation 2
x = 4 x 2
x = 8 hours
To learn more about simultaneous equations, please check: link
Ответ:
Justin worked as a babysitter 8 hours and worked as a lifeguard 2 hours last week
Step-by-step explanation:
Let
x ----> number of hours worked as a babysitter last week
y ----> number of hours worked as a lifeguard last week
we know that
Solve the system by substitution
Substitute equation B in equation A
solve for y
Find the value of x
therefore
Justin worked as a babysitter 8 hours and worked as a lifeguard 2 hours last week
Ответ:
£150 saved; £240 spent.
Step-by-step explanation:
If the ratio of savings to spending is 5:8, we find the fractions representing the amount saved and the amount spent by adding up 5 and 8 and then forming fractions:
savings: 5/13
spending: 8/13
(5/13) of £390 is £150; this is the amount saved.
(8/13) of £390 is £240; this is the amount spent.