Question

HELP PLEASEEE
Variable a is 4 more than variable b. Variable a is also 1 less than b. Which of the following pairs of equations best models the relationship between a and b?

1.a = b + 4
a = b − 1
2. a = 4b
a = b + 1
3. b = a + 4
b = a − 1
4. b = 4a
b = a + 1

Answer 1

Try this: start with 'b' by itself: b
Then write "4 more than b" in math symbols.

Does that start you off well?

Answer 2

$$\Huge \text{a is 4 more than b}$$
$$\Huge a = 4 + b$$

Answer 3

Recall: a + b = b + a

let a = 4

therefore 4 + b = b + 4.

Answer 4

$$\Huge\text{ a is 1 less than b}$$

$$\Huge a = b – 1$$

Answer 5

Recall "is" means "equals"