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vlada-n [284]
3 years ago
8

1 . Josie is taking a family vacation and she had to do a last minute grocery shop for the trip. She needs to buy graham cracker

s for S'mores . A 12 once box is priced at $3.49 and a 16 once box is priced at $3.99. Which is the better deal?
2. Todd drives 450 miles in 9 hours. What is his average speed ?

3. A box of 80 Legos cost $4. How much does 1 lego cost ?
Mathematics
1 answer:
Softa [21]3 years ago
7 0
1: 16 is the better deal

2: 50 mph is his average speed

3: One Levi cost 5 cents
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I need this answered Fast if possible. A car is traveling on a small highway and is either going 55 miles per hour or 35 miles
Alex787 [66]

a. It spends about 2.045 hours going 55 miles per hour

b. It spends 1 hour going 35 miles per hour

c. The trip would take about 3.64 hours

Step-by-step explanation:

A car is traveling on a small highway and is either going 55 miles per hour or 35 miles  per hour, depending on the speed limits, until it reaches its destination 200 miles  away

  • x represents the amount of time in hours that the car is going 55 miles per  hour
  • y represents the amount of time in hours that the car is going 35 miles per hour
  • The equation  that describing the relationship is 55x + 35y = 200

We need to find:

a. How long does it  spend going 55 miles per hour, if the car spends 2.5 hours going 35 miles per hour on the trip

∵ 55x + 35y = 200

∵ The car spends 2.5 hours going 35 miles per hour on the trip

∵ y represents the amount of time that the car going 35 mi./h

∴ y = 2.5

- Substitute the value of y in the equation to find the value of x

∴ 55x + 35(2.5) = 200

∴ 55x + 87.5 = 200

- Subtract 87.5 from both sides

∴ 55x = 112.5

- Divide both sides by 55

∴ x = 2.045 hours

It spends about 2.045 hours going 55 miles per hour

b.how long does it  spend going 35 miles per hour, if the car spends 3 hours going 55 miles per hour on the trip

∵ 55x + 35y = 200

∵ The car spends 3 hours going 55 miles per hour on the trip

∵ x represents the amount of time that the car going 55 mi./h

∴ x = 3

- Substitute the value of y in the equation to find the value of x

∴ 55(3) + 35y = 200

∴ 165 + 35y = 200

- Subtract 165 from both sides

∴ 35y = 35

- Divide both sides by 35

∴ y = 1 hour

It spends 1 hour going 35 miles per hour

c. How long would the trip take, if the car spends no time going 35 miles per hour

∵ 55x + 35y = 200

∵ The car spends no time going 35 miles per hour

∴ y = 0

- Substitute the value of y in the equation to find the value of x

∴ 55x + 35(0) = 200

∴ 55x  = 200

- Divide both sides by 55

∴ x = 3.63 hours

The trip would take about 3.64 hours

Learn more:

You can learn more about the equations in brainly.com/question/4097107

#LearnwithBrainly

5 0
3 years ago
I will give Brainly liest answer if you answer this. I need it for delta math please please please
Ludmilka [50]
24-87!=ysuusjdjxjdjdjjxo
4 0
3 years ago
If 36 inches equals 1 yard then 2 1/3 yard equals how many inches
aniked [119]
84 because 36 x 2 =72 and then 1/3 of 36 is 12 and 12+72=84

7 0
3 years ago
Read 2 more answers
You treat your friend to lunch. The food bill was $30.24. A 7% sales tax will be added and you want to leave a 20% tip.
KiRa [710]

Answer:

a. $2.12

b. $6.45

c. $38.81

Step-by-step explanation:

a.

I'll convert 30.24 and 7% into fractions.

756/25 * 7/100

<em>Cross cancel 756 and 100 (GCF is 4)</em>

189/25 * 7/25

<em>Convert above into a single fraction</em>

(189 * 7)/(25 * 25)

<em>Multiply 189 by 7, then 25 by 25.</em>

1323/625

<em>Divide, then round to the nearest cent</em>

$2.1168 ≈ $2.12 in sales tax

b.

Like before, I'll convert $32.26 ($30.24 + $2.12) and 20% into fractions.

1613/50 * 1/5

<em>Multiply 50 by 5.</em>

1613/250

<em>Divide, then round to the nearest cent.</em>

$6.452 ≈ $6.45 in tip money

c.

This is probably the simplest part of the 3. Just add $30.24 + $2.12 + $6.45.

$30.24 + $2.12 + $6.45

$32.36 + $6.45

You pay a total of $38.81 for lunch.

6 0
3 years ago
Michael started a savings account with $300. After 4 weeks, he had $350, abd after 9 weeks, he had $400. What is the rate of cha
Colt1911 [192]

Answer:


Step-by-step explanation:

The initial amount was $300 and the final amount $350.  This $50 change occurred in 4 weeks.  Thus, the rate of change was

  $50

----------- = $12.50/week for the first four weeks

 4 wks


For the first nine weeks, the rate of change was


$400-$300          $100

------------------- = ----------------- = $0.11/week.

       9 wks               9 wks


Note that this second result makes little sense.  Ensure that you have copied this problem down correctly.

6 0
3 years ago
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