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2 years ago

Help me pretty please

Mathematics

1 answer:

Sergio039 [100]2 years ago

8 0

Answer:

Total distance = 3 1/6 km = 19/6 km

Total time = 1/4 hr

Avg. speed = 19/6 x 4 = 76/6 = 38/3

= 12.67 km/hr

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It costs $350 to rent a room for a party. You also plan to hire a caterer that charges $9.25 per person. Write and solve a linea

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350+9.25x so it would be $905

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3 years ago

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The first day of Alex's trip was a Monday. What was the day of the week on Alex's 39 day of his trip?

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Step-by-step explanation:

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The mean of Holly's first six math quiz scores was 75%. After taking the seventh quiz, her mean score rose to 77%. What was Holl

alexandr1967 [171]

Let x represent Holly's score on 7th math quiz.

We have been given that the mean of Holly's first six math quiz scores was 75%. This means that the average on 1st 6 math quizzes is 75.

To find the total scores on 1st 6 math quizzes, we will multiply 75 by 6 that is $75\times 6 =450$ .

We will use average formula to find test scores on 7th math quiz.

$\text{Average of 7 math quizzes}=\frac{\text{Sum of scores on 7 math quizzes}}{\text{7 quizzes}}$

$77=\frac{x+450}{7}$

Let us solve for x.

$77\cdot 7=\frac{x+450}{7}\cdot 7$

$539=x+450$

$x+450=539$

$x+450-450=539-450$

$x=89$

Therefore, Molly's score on the 7th math quiz was 89.

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3 years ago

Ben has 47 trading cards he stores them in a plastic sleeves. each sleeve holds 6 cards. How many full sleeves are there?

Westkost [7]

47,6 then you simply

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4 years ago

Sarah sold a total of 178 t shirts and posters at a festival. She sold 46 more tshirts than poster. How many posters did she sel

ycow [4]

Sarah sold 66 posters

Solution:

Let "a" be the number of shirts sold

Let "b" be the number of posters sold

Sarah sold a total of 178 t shirts and posters at a festival

Therefore,

number of shirts sold + number of posters sold = 178

a + b = 178 ----------- eqn 1

She sold 46 more tshirts than poster

Number of shirts sold = 46 + number of posters sold

a = 46 + b --------- eqn 2

Substitute eqn 2 in eqn 1

46 + b + b = 178

2b = 178 - 46

2b = 132

b = 66

Thus she sold 66 posters

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3 years ago