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Shtirlitz [24]
2 years ago
6

Jim has received scores of

Mathematics
1 answer:
seropon [69]2 years ago
7 0

Answer:

t ≥ 96   test score must be 96 or greater

Step-by-step explanation:

Let t - score on his third test

   (75 + 81 + t) ÷ 3 ≥ 84

⇒ (75 + 81 + t) ≥ 84 x 3

⇒ (75 + 81 + t) ≥ 252

⇒ 156 + t ≥ 252

⇒ t ≥ 252 - 156 ≥ 96

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Cindy plans to shop for her school supplies and wants to know how much money she would need to spend. from her friend she knows
vlabodo [156]

Let the cost of 1 notebook be x and the cost of 1 binder be y.

4 notebooks and 3 binders would cost 23.5

Therefore, 4x + 3y = 23.5     (1)

7 notebooks and 6 binders would cost 44.5

Therefore, 7x + 6y = 44.5     (2)

Multiply the first equation by 2.

8x + 6y = 47     (3)

(3) - (2) gives

x = 2.5

Substitute the value of x in (1), we get,

4(2.5) + 3y = 23.5

10 + 3y = 23.5

3y = 23.5 - 10

3y = 13.5

y = 13.5/3

y = 4.5

Hence, cost of 5 notebooks and 3 binders is:

5x + 3y = 5(2.5) + 3(4.5)

           = 12.5 + 13.5

           = 26

Hence, cost of 5 notebooks and 3 binders is $26.

4 0
3 years ago
Help me with this look at the photo and help me answer all the questions please and thanks
Nataliya [291]

Answer:

1104seconds and5 milliseconds

(8209-6000)/2

=3209/2

=1104.5

The scientists will reach the ocean floor after 1104.5 seconds.

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5 0
4 years ago
WILL GIVE BRAINLET !!!<br> 2 1/12 + 4/12 ( show how u her the answer )
spin [16.1K]

Answer:

2 5/12

Step-by-step explanation:

you can combine two fractions if they have the same denominator (bottom number) by adding the numerators (top numbers) and keeping the bottom number the same.

1/12+4/12 is the same as 1+4 you just put the sum over 12:

2 1/12+4/12= 2 5/12

it can also be written as 29/12

8 0
3 years ago
8.
Anni [7]

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6 0
3 years ago
6.4 meters + 14.7 - 23.2 = ?
hram777 [196]

Answer:

-2.1

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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