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me. Class Date: Problem Solving Solve the word problems. were 80singers in asings, The averag e sale singers O singers in a singing competition. The average score given singer was 58.5 points. The average score of the female singers ds o4 points and the average score of the male singers was 56 points. for each Ho w many male singers participated in the competition?

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Review Questions Chapter 1 11. Nisa had 76 stalks of roses more than Veronica at first. After Veronica sold 12 stalks of roses, Nisa had 3 times as many stalks of roses as Veronica. How many stalks of roses did Nisa have at first?

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Jul-07-2018
GUIDE: draw bar models for boys & girls using same units U, then solve
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Sep-21-2018
From after:1P + 3U = 850   -> 1P = 850 - 3U3P + 1U = 350so3 ( 850 - 3U ) + 1U = 3502550 - 9U + 1U = 350U = 2200 ÷ 8 = 275P = 850 - 3 ( 275 ) = 25---So red balls to move from A to B = 250 - P= 250 - 25= 225  (ans)---So blue balls to move from A to B = 200 - 3P= 200 - 3 ( 25 )=125  (ans)
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Sep-27-2018
1 Deal = For every $80, you get 11 sets (11 people served)$264 ÷ $80 = 3.3 Deals = 3 Deals maximum-> 3 × 11 sets = 33 sets  (33 people served)---Remainder = $264 - 3 ( $80 ) = $24$24 ÷ $8 = 3 sets  (3 people served)---Total people = 33 + 3 = 36  (ans)
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Oct-18-2018
R = B + 2.403 R + 2 B = 44.203 ( B + 2.40 ) + 2 B = 44.203 B + 7.20 + 2 B = 44.205 B = 37.00B = $7.40R = 7.40 + 2.40 = $9.80  (ans) 
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Aug-06-2018
Nathan, if you receive an alternative answer in class, do share it here. I am sure other students will be keen to know too. Thanks :)
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Aug-31-2018
yz = 28   (i)xy = 56   (ii)xz = 32   (iii)From ii & iiiyz = 5632y = 5632 zFrom i5632 z ( z ) = 28z2 = 16z = 4cm  (ans)y = 28 ÷ 4 = 7cm  (ans)x = 56 ÷ 7 = 8cm (ans) 
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Oct-13-2018
D's Cookies = K's cookies( 130 × Days ) + 74 = ( 133 × Days ) + 323 Days = 42Days = 14---Cookies per person = ( 130 × 14 ) + 74 = 1894  (ans)---ORCookies per person = ( 133 × 14 ) + 32 = 1894  (ans)
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4 days ago
The total sum of internal angles of a 8 sided polygon = 1080°x + (180 - 41 ) + 107 + 145 + ( 180 - 34 ) + 126 + ( 360 - 142 ) + 70 = 1080x = 1080 - 951x = 129°  (ans)---The total sum of internal angles of a 6 sided polygon = 720°x + 33 + ( 360 - 85 ) + 23 + ( 360 - 85 ) + 33 = 720x = 720 - 639x = 81°  (ans)
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3 weeks ago
Total amount of money = 28 × 0.10 = $2.80At first they had 24 coins of 0.10 & 0.20 coinsMax amount of money = 24 × 0.20 = $4.80Difference with actual = $4.80 - $2.80 = $2.00Number of 0.10 coins = $2.00 ÷ 0.10 = 20 coinsSo number of 0.20 coins = 24 - 20 = 4 coins  (ans)
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Oct-19-2018
A Amount = B Amount + $1.40(0.5 × U) = (0.2 × 2U) + 1.4    (U is no. of coins)0.5U = 0.4U + 1.40.1U = 1.4U = 14---No. of 20 cents = 2U = 28 coins  (ans, a)Total money = (0.5 × U) + (0.2 × 2U)= (0.5 × 14) + (0.2 × 2 × 14)= 7 + 5.6= $12.60  (ans, b)
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Oct-18-2018
Refer to diagram:6B - 106 = B + 106 + 9585B = 1170B = 234---A = 6B = 6 × 234 = 1404  ---Total = 234 +1404 = 1638  (ans)
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Oct-17-2018
Total of 8 numbers = 8 × 42.5 = 340Total of 8 numbers = ( 3 × 37.2 ) + 80.2 + ( Total of last 3 no )( 3 × 37.2 ) + 80.2 + ( Total of last 3 no ) = 340( Total of last 3 no ) = 148.2  (ans)
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Oct-06-2018
Refer to diagram:P6 has 25 squares  (ans, a)---P30 = ( # - 1 )2   squares= ( 30 - 1 )2= 29 × 29= 841 squares  (ans, b)---P30 = ( 2# - 1 )   semicircles= ( 2 × 30 -1 )= 59 semicircles  (ans, b)---( 2# - 1 )  = 1111 semicircles # = ( 1111 + 1 ) ÷ 2 = 556 semicircles  (ans, c)
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Sep-26-2018
Hi Skyler, the answer is 4. Symmetrical means objects are the same form and orientation across the line. An easy way is to think of the line as a mirror.
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Sep-16-2018
50 - 25 - 310= 50 - 410 - 310= 50 - 710= 49310  (ANS)
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Sep-13-2018
3U = 12 + 49.50  U = 61.50 ÷ 3   U = $20.50---So Total = ( U + 49.50 ) + ( U + 12 )            = 70 + 32.50            = $102.50  (ans)
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Sep-08-2018
Good one! Short hand refers to the hours & long hand refers to minutes. Each number on minute hand represents 5minutes.
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Aug-26-2018
Product means multiply the 2 factions together :49 × 312 = 13×13 = 19
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Aug-17-2018
GUIDE: all decimals are fractions of base 10, 100, 1000... depending on how many decimal places. In your question it is 1 decimal place which means 8 parts out of ten or 8/10.
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Aug-12-2018
For K, 60 = 270T            T = 4.5h---P travelled for -> 4.5 - 2 = 2.5hFor P,  Speed = 2702.5 = 108 km/h---At 3pm, K & P travelled for 6h & 4h respectivelyDistance apart = 108 ( 4 ) - 60 ( 6 )                         = 72 km 
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Aug-07-2018
a) Fraction spent on additional pencils = 13 × 45 = 415Cost of 12 highlighters = 4 pencils So total "pencils" bought with 15 of money = 5 + 4 = 9Choose 45 U (parts) since we have 9 & 15---b) Total pencils  = 5U + 12U = 17 pencils (ans)Where U = 1 pencil
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Aug-02-2018
GUIDE: Firstly determine how many 1/4 m parts he can cut from the 11/12 m string. Then solve.
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Jun-22-2018
GUIDE: express number of cards bought on 5th day in 2 ways, then solve
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May-30-2018
If you rotate the shaded triangle, there will be a point when all the 3 corners of that triangle touches the outer big triangle.From that we can deduce the area of the big triangle is 4 times that of the shaded triangle.So area of unshaded  part is 34Ans:( 3)
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May-11-2018
Good try but the correct answer should be (880 X 2) = 1760. After giving away $880, Mrs Png will have $880 less while Mrs Fu has an extra $880. So, the difference between the two is (880+880) or (880 X 2) = 1760. thanks
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Mar-03-2018

 $\frac{1}{2}$12  $\frac{1}{4}$14  + $\frac{1}{8}$18  

=  $\frac{4}{8}$48  +  $\frac{2}{8}$28  +  $\frac{1}{8}$18  

=  $\frac{7}{8}$78  

She spent  $\frac{7}{8}$78  of her money

 

1 -  $\frac{7}{8}$78  =  $\frac{8}{8}$88  -  $\frac{7}{8}$78  =  $\frac{1}{8}$18  

 $\frac{1}{8}$18  ×200 = 25

She was left with $25