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Anna11 [10]
2 years ago
13

Lixin intends to buy either Gift A, which costs $10 or Gift B, which costs $8, as Christmas gifts for each of her parents, 2 sib

lings, 13 relatives and 10 friends. Given that she intends to spend $230, find the number of each gift she should buy
Please help !! I need someone
Mathematics
1 answer:
sasho [114]2 years ago
3 0
10a + 8b = 230
a + b = (2 + 2 + 13 + 10)...a + b = 27 (this is the number of gifts to buy)

a = 27 - b

10(27 - b) + 8b = 230
270 - 10b + 8b = 230
-10b + 8b = 230 - 270
-2b = -40
b = -40/-2
b = 20 <=== she bought 20 eight dollar gifts

a = 27 - b
a = 27 - 20
a = 7 <=== she bought 7 ten dollar gifts
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Answer:

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  Please have a look at the attached photo.

<em>Lacey's mom makes her a birthday cake in the shape of an "L" . Lacey loves frosting, so her mom covers the entire outside of the cake in frosting, even the bottom of the cake. </em>

<em>How much space does Lacey's mom cover in frosting? </em>

My answer:

As we know that the surface area of the the cake is made up of rectangles. The formula for find the area of a rectangle is A = lw

  • The area of rectangle ABCD: 4*2 = 8
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The area of CDEVGJ = ABHTFS

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So the total area is: 68 +68  +16+10+18+8+24+8 = 220

Hope it will find you well

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The probability of a student winning is 1/4.

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The probability of Gail winning a scarf is 1/4 × 1/3 = 1/12.

The probability of Simon winning is 1/4.

The probability of either is 1/12 + 1/4 = 1/3.

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