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Alla [95]
3 years ago
10

anna baked 3 batches of cookies with c cookies in each batch she then ate 8 cookies how many cookies does anna have left write y

our answer as an expression
Mathematics
2 answers:
AfilCa [17]3 years ago
8 0

Answer:

3*c - 8

Step-by-step explanation:

She baked 3 batches with c cookies each, that's c + c + c cookies (the "c" represents a number, we don't know the exact amount, is the variable of our equation). But then she ate 8, so we need to subtract that amount from the one we had before, that's c +c + c - 8.

We can rewrite that as 3*c - 8

Helga [31]3 years ago
7 0

I believe 3c - 8 is the correct answer


Hope this helped! :)



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Answer:

11.43

Step-by-step explanation:

[8 + (24 x 3)] divided by 7

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80/7

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11.43 (I rounded it)

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telo118 [61]

Answer:

C

Step-by-step explanation:

the area of a triangle is

baseline × height / 2

so, we know in our case

b(b+12) = 189 cm²

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let's try to solve this by completing the square.

that means we try to find the expression

(b + k)² + c

that is equal to

b² + 12b - 189

(b + k)² + c = b² + 2kb + k² + c = b² + 12b - 189

so,

2k = 12

k = 6

and then

k² + c = -189

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36 + c = -189

c = -225

(b + 6)² - 225 = 0

(b + 6)² = 225

b + 6 = 15

b = 9

so, the baseline b = 9 cm.

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2 years ago
The directions on a sewing pattern say to buy an extra 12.5% of fabric to account for error. Sam needs 2.75 yards of fabric to m
uranmaximum [27]

Answer:

Sam should have bought 3.09 yards of fabric instead of 2.4 yards

So, Option D is correct.

Step-by-step explanation:

Total fabric needed by Sam = 2.75

According to directions on a sewing pattern they say to buy an extra 12.5%

So, extra fabric would be: 12.5% of 2.75

Solving

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Now adding 0.343 into 2.75 to get extra fabric quantity:

2.75+0.343

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Therefore Sam should have bought 3.09 yards of fabric instead of 2.4 yards

So, Option D is correct.

7 0
3 years ago
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