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Ask a binary linear equation application problem, junior one or above education come in to have a look If the length of a rectangle is reduced by 5cm and the width is increased by 2cm, it becomes a square, and the areas of the two figures are equal. How much is the length and width of the rectangle Thank you very much for your reply
Let the length be x and the width be y
Then x - 5 = y + 2
xy = (x - 5)(y + 2)
2 = XY - 5Y + 2x - 10
So 2x - 5Y - 10 = 0
The solution is x = 25 / 3
y = 4/3
What are the singular and plural nouns?
For example, the people of the country
Deer deer means
Sheep, sheep series
Fish species
Chinese (single), Chinese (complex) works factory; works
Ethics (single); moral behavior (multiple) statistics (single); data (multiple) aristocracy, bourgeoisie (bourgeoisie), church, elite (Elite), gentry, intelligence (intellectual), laity (layman), livestock, major, minority, proletariat (proletariat), offspring, public, swarm, youth
If acosb = bcosa, then △ ABC is ()
A. Isosceles triangle B. right triangle C. isosceles right triangle D. isosceles or right triangle
∵ Asina = bsinb = 2R, i.e. a = 2rsina, B = 2rsinb, ∵ acosb = bcosa is transformed into: sinacosb = sinbcosa, sorted out as: sinacosb cosasinb = sin (a-b) = 0, and a and B are the inner angles of the triangle, ∵ A-B = 0, i.e. a = B, then △ ABC is an isosceles triangle
Peter's father bought him a pair of sports shoes yesterday___ a pair of sports shoes yesterday.
Peter's father __ bought_ _ him__ a pair of sports shoes yesterday.
As shown in the figure, in △ ABC, ab = AC = 41cm, D is the point on AC, DC = 1cm, BD = 9cm
∵ AC = 41cm, DC = 1cm, ∵ ad = 40cm, ∵ 402 + 92 = 412, ∵ abd is a right triangle, the area of ∵ ABC is 12 · AC · BD = 12 × 41 × 9 = 184.5 (cm2)
If the least common multiple of two numbers is 84 and the greatest common factor is 7, what are the two numbers
If the least common multiple of two numbers is 84 and the greatest common factor is 7, then the two numbers are 7 and 84 or 28 and 21 respectively
If the ratio of the midlines on the corresponding sides of two similar triangles is 2:3 and the sum of their girths is 20, the girths of the two triangles are ()
If the ratio of the midlines on the corresponding sides of two similar triangles is 2:3 and the sum of their girths is 20, the girths of the two triangles are (8) and (12) respectively
The greatest common factor of the two numbers is 9, and the least common multiple is 243______ And______ ．
9 = 3 × 3243 = 3 × 3 × 3 × 3, these two numbers are 9 and 243, so the answer is: 9243
Given the linear L1: y = 2x + 3, if L1 and L2 are symmetric about X axis, then the slope of L2 is?
The slope of L1 is 2
For X-axis symmetry, the slope is opposite
So the slope of L2 is - 2
What is the plural of half
halves
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