Mathematics
Junior High
math๐ปโโ๏ธ
2๏ธโฃใฎ1ใ5ใๆใใฆใใ ใใ๐ฆ
่งฃ่ชฌใจๅ็ญใ่ผใใฆใใใพใใจๅฉใใใพใ๐โโ๏ธ๐ฆ
2 ๆฌกใฎๅๅใใซ็ญใใใ
(1) ้ฃ็ซๆน็จๅผ
ax-2by=6
bx +4y = - 7
ใฎ่งฃใx=-3.y=1/2ใงใใใจใ,Q,
(2) 2โ21,94โ5 ใฎไธญใง,ๆใๅคงใใๆฐใ็ญใใใ
a,b ใฎๅคใๆฑใใใ
(3) ๅฅๆฐใๆธใใใ5ๆใฎใซใผใ, 13 57.โจ9 ใ1ๆใใคใใใใใใ5ๆใฎใซใผใใใ1
ๆใใค2ๅ็ถใใฆใฒใ, ใฒใใ้ ใซไธฆในใฆ2ใใใฎๆดๆฐใใคใใใจใ, ใใฎ2ใใใฎๆดๆฐใ3ใงๅฒใๅ
ใใ็ขบ็ใๆฑใใใ ใใ ใใ ใฉใฎใซใผใใใฒใใใใใจใๅๆงใซ็ขบใใใใใใฎใจใใใ
ๅณ1
(4) ๅณ1ใง,l//m, AB=ACใฎใจใ, โ xใฎๅคงใใใฏไฝๅบฆใ,
ๆฑใใใ
(5) ๅณ2ใฏ,ไธญๅฟ่ง88โใฎใใใๅฝขใงใใใ ๅผงABไธใซ,
โ AOP = 66ยฐใจใชใ็นPใ, ๅฎ่ฆใจใณใณใในใ็จใใฆไฝๅณ
ใใใใใ ใ,ไฝๅณใซ็จใใ็ทใฏๆถใใชใใงใใใใจใ
(ๅณใฏ่งฃ็ญ็จ็ดใซใใใพใใ)
B
140ยฐ
XC
C
30%
ใ
l
m
Answers
Were you able to resolve your confusion?
Users viewing this question
are also looking at these questions ๐
็ถใ