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Anvisha [2.4K]
3 years ago
8

Ricardo is buying supplies for the school store.He needs 650 pencils. At Store A, he can buy 250 pencils for 20 dollars. At B, h

e can buy 300 for 27 dollars. which is the better buy? how much would ricardo pay at a better price? Unpack the Problem: Make a Plan: Solution: Look Back and Explain:
Mathematics
1 answer:
bixtya [17]3 years ago
6 0

Answer:

Store A

Step-by-step explanation:

If you divide the amount of pencils needed by the amount in the packs, you can see how many packs you need. (But you have to round up because you can't buy half a pack)

So for Store A, it's 3 packs. That would total to $60

Store B also needs 3 packs, and that would be $81

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Can any kind soul help me ASAP!​
CaHeK987 [17]

Answer:

Hope it helps u

Step-by-step explanation:

As we know that ,

Mean = sum of the terms/ numbers of terms

But here grouped data is given so , we use the formula

Mean=∑[f. m]/ ∑f

where f is frequency and m is mid point of each height ,

Now first we have to find the mid point of each interval, where

midpoint of each interval = (lower boundary + upper boundary)/2

m1=(150+154)/2 = 152

m2=(155+159)/2= 157,now found other by same formula, for each interval

m3= 162

m4= 167

m5=172    Now we find the midpoint of each interval ,so now

∑[f. m]=f1*m1+f2*m2+f3*m3+f4*m4+f5*m5

now putting the values of each frequency for given interval and midpoint of each interval we will get,

∑[f. m]=456+942+1296+167*x+344 = 167*x+3038

Now find,

∑f=f1+f2+f3+f4+f5

∑f=19+x

Now we have,

∑[f. m]=167*x+3038

∑f=19+x

also given mean height=161.6 cm

putt these values in above equation we get,

161.6=\frac{167*x+3038}{19+x}

now solve this ,

161.6(19+x)=167*x+3038

3070.4+161.6*x=167*x+3038

3070.4-3038=167*x-161.6*x

32.4=5.4*x

x=32.4/5.4

<h2>x=6   Ans........</h2>

3 0
3 years ago
What is the simplify of this expression -2(2b-3)
patriot [66]

-2(2b-3)

Multiply the bracket by -2

Whenever multiplying a -negative number with a -negative number= + positive number.

(-2)(2b)(-2)(-3)

-4b+6

Answer: -4b+6

6 0
4 years ago
Read 2 more answers
The gas gauge in a car shows it has 40% of a tank of gas. If the car has about 5 gallons, approximately how many gallons can the
-BARSIC- [3]
If 40% of a gas tank is equal to 5 gallons then:

0.40x=5

x=5/0.40

x=12.5

And so the tank can hold up to 12.5 gallons.
8 0
3 years ago
The following are the last 10 run scores Colin got in cricket :
Volgvan

Answer:

a. 8.5

b. 10

Step-by-step explanation:

a.) 1, 1, 2, 7, 7, 10, 12, 16, 20, 34

Since 7 and 10 are tied in the middle, then we need to find a number in the   middle of the two.

8.5 is in the middle of 7 and 10, therefore 8.5 is the mean.

b.) We need to do the same thing we did before, except add 22 to it's directed place:

1, 1, 2, 7, 7, 10, 12, 16, 20, 22, 34

Since 10 is in the middle, 10 is the new mean.

Hope this helps! :D

3 0
3 years ago
This is kind of confusing please help me
ANEK [815]
3a-72yd                                                                                                                  3b-72ft
4a-(left and right 30ft)(up and down 12 ft)
4b-(left and right 25 yds)(up and down 15 yds)
I really hope this helps!! :)
4 0
4 years ago
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