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alisha [4.7K]
3 years ago
14

Micaela sold half of her comic books and then bought fifteen more. She now has 31. With how many did she begin?

Mathematics
2 answers:
AlladinOne [14]3 years ago
7 0

Answer: 8

Step-by-step explanation: 31-15=16 16/2=8

Ede4ka [16]3 years ago
6 0

Answer:

8

Step-by-step explanation:

31-15=16

16/2=8

double check:

8(2)=16

16+15=31

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a car needw fixing and abe can fix it for $70 per hour with a $130 part, but gabe can fix it for $80 an hour with a $40 part. ho
Zolol [24]
70 + 130 = 200
This would be Abe’s one hour of work and the part
80 + 80 + 40 = 200
This would be Gabe’s two hours of work and the part
6 0
3 years ago
Read 2 more answers
A rancher wants to fence in an area of 1500000 square feet in a rectangular field and then divide it in half with a fence down t
VLD [36.1K]

Answer:

6000 ft

Step-by-step explanation:

Let length of rectangular field=x

Breadth of rectangular field=y

Area of rectangular field=1500000 square ft

Area of rectangular field=l\times b

Area of rectangular field=x\time y

1500000=xy

y=\frac{1500000}{x}

Fencing used ,P(x)=x+x+y+y+y=2x+3y

Substitute the value of y

P(x)=2x+3(\frac{1500000}{x})

P(x)=2x+\frac{4500000}{x}

Differentiate w.r.t x

P'(x)=2-\frac{4500000}{x^2}

Using formula:\frac{dx^n}{dx}=nx^{n-1}

P'(x)=0

2-\frac{4500000}{x^2}=0

\frac{4500000}{x^2}=2

x^2=\frac{4500000}{2}=2250000

x=\sqrt{2250000}=1500

It is always positive because length is always positive.

Again differentiate w.r.t x

P''(x)=\frac{9000000}{x^3}

Substitute x=1500

P''(1500)=\frac{9000000}{(1500)^3}>0

Hence, fencing is minimum at x=1 500

Substitute x=1 500

y=\frac{1500000}{1500}=1000

Length of rectangular field=1500 ft

Breadth of rectangular field=1000 ft

Substitute the values

Shortest length of fence used=2(1500)+3(1000)=6000 ft

Hence, the shortest length of fence that the rancher can used=6000 ft

3 0
3 years ago
Karen has 3 1/4 feet of ribbon .She uses 1 3/4 feet to wrap gifts .Which shaded part of the model shows 1 3/4
andriy [413]

Answer:

3 1/4 - 1 3/4  = 1 1/2

4 0
2 years ago
Please help me with this question, I'm stuck ;( .
sveticcg [70]

i think C but i dont know forsure

7 0
3 years ago
Estimate 22,752 divided by 16
horrorfan [7]
Math answers to division of fraction 22752/16

22752
16
=
1422

1422 = 14220 to the nearest tenth

1422 = 1422 to the nearest hundredth

1422 = 1422 to the nearest thousandth

= 0 to the nearest tenth

= 0 to the nearest hundredth

= 0 to the nearest thousandth

Other Divisions Math homework are

22752 divide by half plus 20

Homework answers: (22752/2) + 20 = 11396

22752 divide by half plus 40

Homework answers: (22752/2) + 40 = 11416

22752/16 divided by 2

Answer: (22752/16) ÷ 2 = 711
8 0
2 years ago
Read 2 more answers
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