Answer:
can you put the picture of the solid so i can help you
Step-by-step explanation:
z>3
Step 1
they were supposed to multiply 2x by 4 and -1 by 4 but they only multiplied 2x by 4.
a) a *5+5= 20
5a + 5 = 20
5a = 20 - 5
5a = 15
a = 15/5
a = 3
b) b/5 - 5 = 4
b/5 = 4 + 5
b/5 = 9
b =9*5
b = 45
