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Tresset [83]
3 years ago
14

Zahra spent $20.50 on 10 party favors for her party. The boys each received a puzzle book that cost $1.75 each. The girls each r

eceived a magic trick that cost $2.25 each. How many boys and how many girls attended the party? None of the other answers are correct 4 boys and 6 girls 5 boys and 5 girls 6 boys and 4 girls 7 boys and 3 girls
Mathematics
1 answer:
Mazyrski [523]3 years ago
5 0
X = # of boys, y = # of girls
x + y = 10 --> y = 10-x
2.25y + 1.75x = 20.50
2.25(10-x) + 1.75x = 20.5
22.5 - 2.25x + 1.75x = 20.5
-0.5x = 20.5-22.5
-0.5x = -2.0
÷ -.5 ÷ -.5
x = 4 --> 4 boys, so 10-4 = 6 girls
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Ax+3 = 7- bx what is x expressed in terms of a and b
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Ax+3=7-bx
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Ax+3=7-bx
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2 years ago
The volume of a cube with sides of length s is given by v = s3. find the rate of change of the volume with respect to s when s =
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I think the unit is cm^2

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2 years ago
A telephone pole that is 12 ft. tall has fallen against a house. If the top of the telephone pole touches the house 10 ft. above
Ostrovityanka [42]

Answer:

56.44 degrees

Step-by-step explanation:

          sin(measure of the angle)=10/12

sin^-1(sin(measure of the angle))=sin^-1(10/12)

                 measure of the angle=56.44

4 0
2 years ago
Read 2 more answers
If FH = 9x + 15 and GH = 5x + 4,<br> then FG = ?
Tatiana [17]

Answer:

FG = 39

Step-by-step explanation:

From the question given:

FH = 9x + 15

GH = 5x + 4

FG = ?

From the question given above, we can say that G is the midpoint of FH. This implies that:

FH = FG + GH

With the above idea in mind, we can obtain FG as follow:

FH = 9x + 15

GH = 5x + 4

FG = ?

FH = FG + GH

9x + 15 = FG + 5x + 4

Rearrange

FG = 9x + 15 - 5x - 4

FG = 9x - 5x + 15 - 4

FG = 4x + 11

Next, we shall determine the value of x. This can be obtained as follow:

Since G is the midpoint of FH, it therefore means that FG and GH are equal i.e

FG = GH

With the above idea in mind, we can obtain the value of x as follow:

FG = 4x + 11

GH = 5x + 4

FG = GH

4x + 11 = 5x + 4

Collect like terms

11 - 4 = 5x - 4

7 = x

x = 7

Thus, we can obtain the value of FG as follow:

FG = 4x + 11

x = 7

FG = 4x + 11

FG = 4(7) + 11

FG = 28 + 11

FG = 39

***Check ***

FH = 9x + 15

x = 7

FH = 9(7) + 15 = 63 + 15 = 78

GH = 5x + 4

x = 7

GH = 5(7) + 4 = 35 + 4 = 39

FG = 4x + 11

x = 7

FG = 4(7) + 11 = 28 + 11 = 39

FH = FG + GH

FH = 78

FG = 39

GH = 39

FH = FG + GH

78 = 39 + 39

78 = 78

4 0
3 years ago
Jelly's Candy Shop sells jelly beans by weight. They charge $8.95 per pound. You and your date each filled a bag with jelly bean
Vaselesa [24]

Answer:$9.49

Step-by-step explanation:

8.95×.61=5.4595

8.95×.45=4.0275

5.4595+4.0275= 9.49(rounded answer)

4 0
2 years ago
Read 2 more answers
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