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Aliun [14]
3 years ago
9

Jake has 145 bottle caps and daniel has 143 bottle caps. how many bottle caps do they have in all? 145 143 = 288 which of the fo

llowing problems could be solved in the same way?
a. ed has 76 model trains and mike has 121 model trains. how many trains do they have altogether?
b. henry has to write 32 thank you letters. he has written 13 so far. how many more letters must he write?
c. mary had 19 oranges. she gave 12 oranges to amy. how many oranges does mary have now?
Mathematics
1 answer:
Lelechka [254]3 years ago
3 0
A because you just add them the others you subtract.
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jeanine Baker makes floral arrangements. She has 13 different cut flowers and plans to use 7 of them. How many different selecti
Ksju [112]

A total of 1,716 selections of the 7 flowers are possible.

Step-by-step explanation:

Step 1:

There are 13 flowers from which Jeanine Baker plans to use 7 of them.

To determine the number of selections that are possible we use combinations.

The formula for combinations is; ^{n} C_{r}=\frac{n !}{(n-r) ! r !}.

Step 2:

In the given formula, n is the total number of options and r is the number of options to be selected.

For this question, n = 13 and r=7.

So ^{13} C_{7}=\frac{13 !}{(13-7) ! 7 !} = \frac{13 !}{(6) ! 7 !} = 1,716.

So a total of 1,716 selections are possible.

3 0
3 years ago
Please help me with this i’m not very good at these
astra-53 [7]
I think the answer is 5.6
5 0
2 years ago
Ethan drove the first half of his trip's distance at an average rate of 60 miles per hour, and the second half at an average
tensa zangetsu [6.8K]

Answer:

Simple

65 miles per hour on average

Step-by-step explanation:

You add 60 to 70 and then you divide them by 2

Which is

60 + 70 = 130

130 ÷ 2 = 65

4 0
2 years ago
A tutor work with 3 students. The oldest student is 6 years oldder then the middle student, and the youngest student is 3 years
Dennis_Churaev [7]

Answer:

9 years old.

Step-by-step explanation:

Since the ages of all of these students are being represented in relation to the middle student's age then we can create formulas for each student and then apply them to the formula for the sum of their ages and solve for the middle child's age (M) like so... (oldest child's age is represented by variable O and youngest child's age is represented by variable Y)

O = M + 6

Y = M - 3

30 = (M+6) + M + (M-3)  ... combine like terms

30 = 3M + 3  ... subtract 3 from both sides

27 = 3M  ... divide both sides by 3

9 = M

Now we know that the middle child is 9 years old.

6 0
3 years ago
The Travers are adding a new room to their house. The room will be a cube with volume
Damm [24]

Answer:

$1620

Step-by-step explanation:

The volume (V) of a cube is calculated as

V = s³ ( s is the length of the side )

Here V = 5832 , then

s³ = 5832 ( take cube root of both sides )

s = \sqrt[3]{5832} = 18 ft

The area of the square floor is then

area = 18² = 324 ft²

cost = 324 × $5 = $1620

4 0
3 years ago
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