Ivan needs to read 4 novels each month. Let N be the number of novels Ivan needs to read in M months. Write an equation relating N to M. Then use this equation to find the number of novels Ivan needs to read in 13 months.

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

45

step-by-step explanation:

it would be 3 ÷by 6 because the number on each side

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