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zimovet [89]
3 years ago
5

Karina needs a total score of at least 627 on three games of bowling to break the league record. Suppose she bowls 222 on her fi

rst game and 194 on her second game. What score does she need on her third game to break the record? (Write an inequality).
Mathematics
1 answer:
irga5000 [103]3 years ago
3 0
X+y+z≥627
x=222
y=194

222+194+z≥627
if we solved for z then
z≥221
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Your brother is 1313 your age. Your sister is 6 years older than your brother. Your sister is 10 years old. Write and solve an e
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There seems to be a typo. You wrote 1313, but I'm assuming you meant to say the fraction 1/3. If this assumption is correct, then continue with the rest of the solution. If the assumption is not correct, then ignore what I wrote below and please provide clarification of what the "1313" should represent. Thank you.

----------------

B = your brother's age

S = your sister's age

Y = your age

All of these ages are current present day ages.

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"your brother is 1/3 your age" so B = (1/3)Y or B = Y/3.

"Your sister is 6 years older than your brother" so S = B+6

"Your sister is 10 years old" so S = 10.

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S = B+6

B+6 = S

B+6 = 10 ... plug in S = 10

B+6-6 = 10-6 ... subtract 6 from both sides

B = 4

Your brother is 4 years old.

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B = Y/3

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<h3>Answer: Your age is 12 years old.</h3>

note: This answer hinges on assumption that the "1313" should be "1/3".

6 0
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Bob the builder is making 480 kg of concrete mix concrete is made by mixing cement sand and gravel in the ratio 1:3:4 how much d
Vera_Pavlovna [14]

Answer:

see the explanation

Step-by-step explanation:

Let

x ---> kilograms of cement needed

y ----> kilograms of sand needed

z ----> kilograms of gravel needed

we know that

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Divide 480 by 8

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Multiply the scale factor by the ratio 1:3:4

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60(1)=60\ kg

<em>Find out the kilograms of sand needed</em>

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<em>Find out the kilograms of gravel needed</em>

60(4)=240\ kg

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