Question

resolvam pra mim com todas as operações se conseguirem somente a 4,5,6 e 7

Answer 1

2)

15 ----- 180
x ------- 300

180x=300*15
180x=4500
x=4500/180
x=25 L

3)

4 ----- 75
12 ---- x

4x=75*12
4x=900
x=900/4
x=225

4)

100 ------- 360
12 --------- x

100x=360*12
100x=4320
x=4320/100
x= 43,2 (desconto)

360 - 43,2 = R$ 316,80 (alternativa d)

5)

100 ----- 300
30 ------ x

100x=300*30
100x=9000
x=9000/100
x=90 alunos (alternativa b)

6)

100 ----- 69
12 ------- x

100x=69*12
100x=828
x=828/100
x=8,28 (acréscimo)

69 + 8,28 = R$ 77,28 (alternativa d)

7)

100 ----- 450
40 ------- x

100x=450*40
100x=18000
x=180 (desconto)

450-180= R$270,00 (alternativa d)

Espero ter ajudado :)

Answer 2

4) 360.12/100= 4320/100= 43,2 -> 360,00-43,20= 316,80

5) 300.30/100= 9000/100= 90 -> letra b

6) 69.12/100= 828/100= 8,28 -. 69,00+8,28= 77,28

7)450.40/100= 1800/100= 180