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Luden [163]
3 years ago
13

Louisa used a gift card to pay for 3 meals at a vegetarian restaurant. Each meat cost $7. By how much has the value of the gift

card changed after the purchase of the meals?
A.-$10
B.+$10
C.$7
D.-$21
Mathematics
2 answers:
Stells [14]3 years ago
7 0

Answer:

D

Step-by-step explanation:

romanna [79]3 years ago
5 0

Answer:

D.-$21

Step-by-step explanation:

You might be interested in
Help asap!!
Alekssandra [29.7K]

there are 360 degrees in a complete circle

360/18 = 20

 so the answer is C

4 0
3 years ago
Read 2 more answers
How much does 4 5/7 kg of candy cost if 5/6 kg costs $7.50
Aliun [14]

Answer:

It costs $42.43

Step-by-step explanation:

Lets explain how to solve the problem

- The cost of \frac{5}{6} kilogram of candy is $7.5

- We need to find the cost of 4\frac{5}{7} kilogram

We  can use the ratio to find the answer

======= Dollar   :    Kilogram

======= 7.5        :    \frac{5}{6}

=======  c           :    4\frac{5}{7}  

By using cross multiplication

∴ c × \frac{5}{6} = 7.5 × 4\frac{5}{7}

∵ 4\frac{5}{7} = \frac{4*7+5}{7}

∴ 4\frac{5}{7} = \frac{33}{7}

∴ c × \frac{5}{6} = 7.5 × \frac{33}{7}

∴ c × \frac{5}{6} = \frac{495}{14}

Divide both sides by \frac{5}{6}

∴ c = \frac{495}{14} ÷ \frac{5}{6}

Change the division sign to multiplication sign and reciprocal the

fraction after the division sign

∴ c = \frac{495}{14} × \frac{6}{5}

∴ c = \frac{297}{7} = 42.43 dollars

∵ c represents the cost of 4\frac{5}{7} kg

∴ It costs $42.43

7 0
3 years ago
Suppose your car averages 38 miles per gallon on the high-
Stella [2.4K]

Answer:

a. around 36.36 hours; around 28.57 hours

b. $134.21; $159.38

Step-by-step explanation:

4 0
3 years ago
What is -6w < 85. help
dolphi86 [110]

Answer:

w=[-14.1667, ∞)

Step-by-step explanation:

the variable w can be any real number less than the value of 85, thus -6 multiplied by any number greater than the value of 14.1667 shall be less than 85. the value for the minimum limit number is obtained dividing 85 by -6 due to the varibale -6w and the value 85 as the maximum limit.

5 0
3 years ago
Q3. In a hydraulic lift, a 1400 N force is applied to a 0.5 m2 piston. Calculate the minimum surface area of the large piston to
blondinia [14]

Answer:

1.8m^2 approx

Step-by-step explanation:

Given data

P1= 1400N

A1=0.5m^2

P2=5000 N

A2=??

Let us apply the formula to calculate the Area A2

P1/A1= P2/A2

substitute

1400/0.5= 5000/A2

cross multiply

1400*A2= 5000*0.5

1400*A2= 2500

A2= 2500/1400

A2= 1.78

Hence the Area is 1.8m^2 approx

3 0
3 years ago
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