Ineed with this
$5.40+$8.70+$6.30
plz this is fifth grade math and it is using compensations and it is hard

£20.40

Step-by-step explanation:

6.30+8.70 = 15

15+5.40 = 20.40

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry