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elena55 [62]
2 years ago
5

Question:

Mathematics
2 answers:
lina2011 [118]2 years ago
8 0

Answer:

$21

Step-by-step explanation:

starting money: 51

cost of each book = 3

total books bought = 10

3*10 = $30 spent on books

51-30 = $21 left

dmitriy555 [2]2 years ago
7 0

Answer:

Ayana have left 21$

Step-by-step explanation:

10x3$=30$

Then,30$-51$=21$

Hope it helps

..

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What's the slope and y-intercept of the equation 3x + 4y = 8?
Anna71 [15]

Answer:

Slope = -3/4

y-intercept = 2

Step-by-step explanation:

3x+4y = 8\\\therefore 4y = -3x +8\\\therefore y = \frac{-3}{4}x+ \frac{8}{4}\\\therefore y = \frac{-3}{4}x+2\\Equating \: it \: with\: \\y=mx+b\\Slope\:(m) = \frac{-3}{4}\\y-intercept\:(b) = 2

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2 years ago
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2 by 5 into bracket minus 3 by 7 minus 1 by 6 into 3 by 2 + 1 by 4 into 2 by 5??​
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Answer:

(2*5) 3*7-1*6÷3*2+1*4÷2*5=216

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2 years ago
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Jan spent 3 3/4 hours doing homework last week. She spent
olchik [2.2K]

Answer:

6/4

Step-by-step explanation:

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2 years ago
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5. Each pair of polygons below are similar. Show your work! Solve for x:
Stella [2.4K]
Since they are similar, you need to find the ratio of similarity (I made up the term, there is probably a correct one that I can’t remember).

If you divide 16/40, you’ll find that that ratio is 2.5. So then you just multiply 16 x 2.5. You’ll get 18.

18 is the length of the top of the trapezoid.

You set 18=2x+4 and solve it algebraically. Subtract 4 from both sides.

14=2x
Divide by 2 and x=7

(You can also check that the ratio is right by 16/18 is the same decimal value as 40/45. You’ll get .88888...)
4 0
3 years ago
Caleb took 9 photos at the zoo. One third of his photos are of giraffes. Enter the number of Caleb's photos that are of giraffes
Serhud [2]

Answer:

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Step-by-step explanation:

1/3 of 9 is 3. Caleb took 3 pictures of giraffes.

3,6,9...

1/3, 2/3, 3/3=1

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2 years ago
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