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Ksenya-84 [330]
3 years ago
13

After Ricardo received his allowance for the week, he went to the mall with some friends. He spent half of his allowance on a ne

w paperback book. Then he bought himself a snack for $1.25. When he arrived home, he had $5.00 left. How much was his allowance?
Mathematics
2 answers:
ad-work [718]3 years ago
6 0
Lets work backwards, he had $5 after it all, and spent $1.25 on a snack, so we add that to the remainder, which is $6.25. then he spent half of that on whatever stuff he likes, so add $6.25 and $6.25, which is $12.50
DerKrebs [107]3 years ago
3 0

Answer:

$12.50

Step-by-step explanation:

We have to find value of his allowance

Let Ricardo received allowance =x

He spent his allowance on anew paperback book=\frac{x}{2}

He spent money on snacks=$1.25

He had money left=$5.00

According to question

\frac{x}{2}+1.25+5=x

6.25=x-\frac{x}{2}

6.25=\frac{2x-x}{2}

\frac{x}{2}=6.25

x=6.25\times 2

x=12.50

Hence, Ricardo received his allowance for the week =$12.50

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Linda and Carrie made a trip from their hometown to a city about 200 miles away to attend a friend's wedding. The following char
marissa [1.9K]
The correct answer is C) 58/73.

We first add up the amount of time spent driving:
3 + 1 1/2 + 20 minutes

Changing 20 minutes to a fraction of an hour, 20/60 = 1/3:
3 + 1 1/2 + 1/3

Using the LCD (6), 
3 + 1 3/6 + 2/6 = 4 5/6 hrs driving.

Now we find the total time of the trip:
3 + 15 min + 1 1/2 + 1 + 20 min
= 3 + 15/60 + 1 1/2 + 1 + 20/60
= 3 + 1/4 + 1 1/2 + 1 + 1/3

The LCD for this is 12:
3 + 3/12 + 1 6/12 + 1 + 4/12 = 5 13/12 = 6 1/12

We find the ratio of driving to total time, which is (4 5/6)/(6 1/12)
= 4 5/6 ÷ 6 1/12

Converting the mixed numbers to improper fractions,

29/6 ÷ 73/12 = 29/6 × 12/73 = 348/438 = 174/219 = 58/73
6 0
3 years ago
Speedie ran the 200 meter race in 25.5 seconds. How much of an hour did it take Speedie to run
grigory [225]

Answer:

Speedie ran the race in 0.708(3)% of an hour, the 3 in the parentheses means the 3 repeats forever

Step-by-step explanation:

We have 25.5/3600, and when we convert it to a decimal, we have 0.00708(3), the 3 in the parentheses means the 3 repeats forever. To convert it to percentage, we multiply it by 100, to get 0.708(3). Hope it helps!

5 0
3 years ago
Pls help. (Use answers below)
velikii [3]

Answer:

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Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Suppose a package delivery company purchased 17 trucks at the same time. Six trucks were purchased from manufacturer A, five fro
yaroslaw [1]

Answer:

df_{den}=df_{between}=N-K=17-3=14.

Step-by-step explanation:

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".  

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"  

If we assume that we have 3 groups (A,B,C) and on each group we have sample of size (6,5,6) respectively , on each group we can define the following formulas of variation:  

SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2  

SS_{between}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2  

SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2  

And we have this property  

SST=SS_{between}+SS_{within}  

The degrees of freedom for the numerator on this case is given by df_{num}=df_{within}=k-1=3-1=2 where k =3 represent the number of groups.

The degrees of freedom for the denominator on this case is given by df_{den}=df_{between}=N-K=17-3=14.

And the total degrees of freedom would be df=N-1=17 -1 =16

On this case the correct answer would be 2 for the numerator and 14 for the denominator.  

Best answer

14

4 0
3 years ago
Can't figure this question out!!! Giving Brainliest!!!
Andrej [43]

Answer:

x = -8

^

I

I

I

I

That is the correct answer

5 0
3 years ago
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