Question

I need help pls need the answers by today

Answer 1

Answer:

71. 19  72. 100  73. 9  74.1  75. 90  76. 4

Step-by-step explanation:

#71.

Start with 2b-a

Plug in the given numbers where the variables are.

Now the equation is 2(12) - 5

Solve 2(12) - 5

2(12) = 24      24 - 5 = 19

#72.

Start with d(ab-c)

Plug in the given numbers where the variables are.

Now the equation is 2((5×12) - 10)

Solve in the parenthesis first.

5×12= 60    60-10=50    2(50)= 100

#73.

Start with 3+ $\frac{b}{d}$

Plug in the given numbers where the variables are.

Now the equation is 3+ $\frac{12}{2}$

Solve.

$\frac{12}{2}$ = 6    3+6 = 9

#74.

Start with $\frac{4a}{b+4d}$

Plug in the given numbers where the variables are.

Now the equation is $\frac{4(5)}{12+(4x2)}$

Solve.

4(5)= 20    

(4×2)= 8    12+8= 20

Now the fraction is  $\frac{20}{20}$ = 1

#75.

Start with 2a² - c

Plug in the given numbers where the variables are.

Now the equation is 2(5)² - 10

Solve 2(5) = 10      10² = 100  100-10= 90

#76.

Start with b - c + d

Plug in the given numbers where the variables are.

Now the equation is 12 - 10 + 2

Solve.

12 - 10 = 2     2 + 2 = 4