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Solving exercise 1 on page 88 SGK Math 7 Volume 2
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Solving exercise 2 on page 89 SGK Math 7 Volume 2
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Solution for exercise 3 on page 89 of Math 7 Textbook Volume 2
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Solution for exercise 4 on page 89 of Math 7 Textbook Volume 2
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Three business units invest capital in the ratio of 2:5 and 7. How much profit does each unit receive if the total profit is 560 million VND and the profit is distributed in proportion to the invested capital?
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Solution for exercise 5 on page 89 of Math 7 Textbook Volume 2
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Solution for exercise 6 on page 89 of Math 7 Textbook Volume 2
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Find a given that the graph of the function y = ax passes through point M(-2;-3).
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Solution for exercise 7 on page 89 of Math 7 Textbook Volume 2
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The chart below represents the percentage (%) of children aged 6 to 10 attending primary school in some regions of our country:
Please provide:
a) The percentage (%) of children aged 6 to 10 attending primary school in the Central Highlands and the Mekong Delta regions.
b) Which region has the highest and lowest percentage (%) of children aged 6 to 10 attending primary school?
Answer:
a) - The percentage of children aged 6 to 10 attending school in the Central Highlands is 92.29% (compared to the population within the age group).
- The percentage of children aged 6 to 10 attending school in the Mekong Delta region is 87.81% (compared to the population within the age group).
b) Based on the chart, we observe: The Red River Delta region has the highest percentage of children aged 6 to 10 attending primary school, and the Mekong Delta region has the lowest percentage of children aged 6 to 10 attending primary school.
Solution for Exercise 8 on page 90 of Math 7 Textbook Volume 2
Problem:
To study the seasonal output of a commune, 120 plots are selected for trial harvesting, and the yield of each plot is recorded (measured in tons/hectare). The results are temporarily arranged as follows:
There are 10 plots with a yield of 31 tons/hectare; There are 20 plots with a yield of 34 tons/hectare
b) Represent using a line segment graph.
c) Find the mode of the signs.
d) Calculate the mean average of the signs.
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Solve exercise 9 on page 90 of Math Textbook 7 Volume 2
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Solve exercise 10 on page 90 of Math Textbook 7 Volume 2
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Solve exercise 11 on page 90 of Math Textbook 7 Volume 2
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Find x, given:
a) (2x - 3) - (x - 5) = (x + 2) - (x - 1).
b) 2(x - 1) - 5(x + 2) = -10
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Solve exercise 12 on page 90 of Math Textbook 7 Volume 2
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Solve exercise 13 on page 90 of Math Textbook 7 Volume 2
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