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sveticcg [70]
3 years ago
9

Jenny bought four cookies for $2 each, and Lisa bought five cookies for $3 each. How much did the girls pay all together for the

cookies?
Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
6 0
The total they paid is $23 because 1 of them bought 4 cookies for $2 each so we multiply 4 and 2 we will get $8 and the other girl bought 5 cookies for $3 each so we multiply 5 and 3 and that is $15 so we add $15 and $8 and we will end up with $23
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How many different four lettered codes can be formed if the first letter must be an S or a T
emmainna [20.7K]

Answer:

27,600

Step-by-step explanation:

We use the following formula:-  

Number of permutations of r from n

= nPr

= n! / (n-r)!

I am assuming you don't allow repeated letters in the 4 letter codes.

Take S as the first letter. Then we have 3 letters extra out of 25 letters.

Using the above formula the possible ways of doing this is

25! / (25 - 3)!

25! / 22!

= 25*24*23

= 13800.

The same number is obtained if the first letter is a T.

So the answer is 2*13800

= 27,600

8 0
3 years ago
Hello! Please help.
valina [46]

1 -

3 cups left.

2-

David biked  a total of 158 miles (option C)

Why?

- First exercise:

To solve the problem we need to consider that for each 1/2 cup of cornmeal, we will have 6 corn muffins.

So, calculating we have:

TotalMuffins=24=4*6\\\\UsedCups=\frac{1}{2}*4=2Cups

We can see that, if each 1/2 cups can give us 6 corn muffins, 2 cups can give us 24 corn muffins.

CupsLeft=5cups-2cups=3cups

Hence, there are 3 cups left.

- Second exercise:

We can solve the problem by multiplying or adding the fractions according to the number of dots assigned to each one.

So, calculating we have:

FirstDay=10miles*2=20miles\\SecondDay=10\frac{1}{2}miles=10.5miles\\ThirdDay=11miles*3=33miles\\FourthDay=11\frac{1}{2}miles*4=11.5miles*4=46miles\\FifthDay=12miles*3=36miles\\SixthDay=12\frac{1}{2}miles=12.5miles

Total=20miles+10.5miles+33miles+46miles+36miles+12.5miles\\Total=158miles

Hence, we have that David covered a total 158 miles. (Option C)

Have a nice day!

5 0
3 years ago
Read 2 more answers
NEED HELP LIKE NOW<br> Is (1, 5) a solution to −5x+6y=25?<br> yes or no????
Phoenix [80]

Answer:

No

Step-by-step explanation:

-5*1+6*5=30 as the value doesn't support the equation

3 0
3 years ago
WUIZ
AVprozaik [17]

Answer:

B length = 8 in.; width = 4 in

Step-by-step explanation:

Given

the length L = w + 4

Perimeter = 24 inches

Perimeter of a rectangle

= 2(L + W)

We now have two equations.

Equation 1: L = w + 4

Equation 2: P = 2(L + W)

Substitute L as w + 4 into equation 1. And 24 for p

Therefore

24 = 2(w + 4 + w)

24 = 2(2w + 4)

Distribute 2 into (2w + 4)

We have

24 = 2 x 2w + 2 x 4

24 = 4w + 8

Subtract 8 from both sides

24 - 8 = 4w + 8 - 8

16 = 4w

Divide both sides by 4

16/4 = 4w/4

4 = w

w = 4 inches

Now substitute 4 for w into either of the equations to get

L.

Using equation 1 , we have

L = w + 4

L = 4 + 4

L = 8 inches

6 0
3 years ago
Read 2 more answers
A toy manufacturer that 6% of its products are defective. if 550 toys are producted in one day, how many we be defective
weqwewe [10]

Answer:

If 550 toys are made in a day, and 6% of them are defective, about 33 of them will be defective.

Step-by-step explanation:

To calculate the number of toys that will be defective, move the decimal of the percentage 2 place to the left. So the 6% will turn into 0.06, then you would multiply 550 by 0.06. Resulting in about 33 toys being defective.

6% = 0.06

-

550 x 0.06 = 33

7 0
2 years ago
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