Question

exercitiile 4, 6, 7 vaaa roogg​

Answer 1

4. Ma= (a+b) /2= 6,4

A+b= 6,4x2=12,8

A=bx3=3b

3b+b=12,8

4b=12,8

B=12,8:4=3,2

A=3b= 3x3, 2=9,6

Verificare: (9,6+3,2)/2=6,4

12,8:2=6,4

6,4=6,4

Ex 6

110.....100%

88.....x%

110x= 88x100

110x= 8800

X=8800:110= 80%

110.....100%

93.....x%

110=93x100

110x=9300

X=9300:110=84, 54

110....100%

101....x%

110x=101x100

110x=10100

X=10100:110=91,81

110...100%

58....x%

110x=5800

X=5800:110=52, 72

110x=9500

X=9500:110=86,36

110x=9900

X=9900:110=90

La b, c,d ma mai gândesc și îți trimit poza

7. A, b, c la fel

D) 10

E) 14