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2 years ago

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Amy began with 5 marbles for every 3 marbles that tara had. After amy gave 1 marble to tara, amy ended up with 3 marbles for eve

ry 2 that tara had then. How many marbles did amy begin with

2 answers:

Inessa05 [86]2 years ago

8 0

Answer:Amy began with 9 marbles because tara had 6 for her 9

Step-by-step explanation:

Step2247 [10]2 years ago

5 0

Answer:

the answer is 9 marbles

Step-by-step explanation:

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Kelly ordered 10 pizzas for a party. 30% of the pizzas have 12 slices each. The remaining 70% of the pizzas have 8 slices each.

abruzzese [7]

Answer:

The total number of slices is 92

Step-by-step explanation:

we know that

Kelly ordered 10 pizzas for a party

step 1

30% of the pizzas have 12 slices each

so

The number of pizzas for 30% is equal to

0.30(10)=3 pizzas

The number of slices is

3(12)=36 slices

step 2

70% of the pizzas have 8 slices each

so

The number of pizzas for 70% is equal to

0.70(10)=7 pizzas

The number of slices is

7(8)=56 slices

step 3

Find the total number of slices

36+56=92 slices

8 0

2 years ago

79% of a university's freshman class are majoring in Engineering. If 2765 students in the freshman class are Engineering majors,

Karolina [17]

$2765 \div 0.79 = 3500$

There are 3500 students in the freshman class.

8 0

1 year ago

Read 2 more answers

Consider the trinomial 9x2 + 21x + 10. What value is placed on top of the X? What value is placed on the bottom of the X? What i

inna [77]

Answer: 1) Value is placed on top of the X =90

2) Value is placed on the bottom of the X =21

3) Factored form will be (3x+5)(3x+2)

Step-by-step explanation:

Since we have given that

$9x^2 + 21x + 10$

As we know the quadratic form :

$ax^2+bx+c=0$

1) Value is placed on top of the X is given by

$a\times c=9\times 10=90$

2) Value is placed on the bottom of the X is given by

$b=21$

3) Factorised form:

We will use "Split the middle term":

$9x^2 + 21x + 10\\\\=9x^2+15x+6x+10\\\\=3x(3x+5)+2(3x+5)\\\\=(3x+2)(3x+5)$

Hence, Factored form will be

(3x+5)(3x+2)

7 0

2 years ago

Read 2 more answers

Susan keeps track of the number of tickets sold for each play presented at the community theater. within how many standard devia

Citrus2011 [14]

The Mean = (135 + 71 + 69 + 80 + 158 + 152 + 161 + 96 + 122 + 118 + 87 + 85 ) : 12 = 111.166
The smallest value : 69
The greatest value : 161
s² = ∑( x i - x )² / ( n - 1 )
s² = ( 568.274 + 1613.3 + 1777.97 + 971.32 + 2193.42 + 1667.4 + +2483.42 + 230 + 117.38 + 46.7 + 584 + 684.66 ) : 11
s² = 1176.1676
s = √s² = √1176.1676
s ( Standard deviation ) = 34.295
All the values fall within 2 standard deviations:
x (Mean) - 2 s and x + 2 s

3 0

2 years ago

Read 2 more answers

A test tube contains 25 bacteria, 5 of which are can stay alive for atleast 30 days, 10 of which will die in their second day. 1

boyakko [2]

Answer:

c. $\frac{1}{5}$

Step-by-step explanation:

Given,

Number of bacterias who alive for at least 30 days = 5,

Bacterias who alive for 2 days = 10,

Died bacterias = 10,

Total bacterias = 5 + 10 + 10 = 25,

Ways of choosing a bacteria = $^{25}C_1$ = $\frac{25!}{1! 24!}$ = 25,

While, ways of choosing of a bacteria who will live after 1 week = $^5C_1$ = $\frac{5!}{1!4!}$ = 5,

Hence, the probability it will still be alive after one week = $\frac{5}{25}$ = $\frac{1}{5}$

OPTION C is correct.

3 0

2 years ago