2 years ago

Joe is 5 years older than Sydney. The sum of their ages is 45. What is Sydney’s age?

Mathematics

1 answer:

sweet-ann [11.9K]2 years ago

8 0

Answer:

20 years old

Step-by-step explanation:

Joe = J

Sydney = S

J = 5 + S

J + S = 45

Substitute

5 + S + S = 45

Add

5 + 2S = 45

Subtract 5 from both sides of the equation

2S = 40

Divide both sides of the equation by 2

S = 20

Sydney is 20 years old

Hope this helps :)

You might be interested in

In a class 32 students, 4students we're homesick with the flu on Thursday. what percentage of the students were absent on Thursd

Fynjy0 [20]

Answer:

12.5%

Step-by-step explanation:

4 * 100 / 32 = 12.5

6 0

2 years ago

One-third times the difference of a number and 5 is Negative two-thirds. Which equation best shows this? One possible first step

PSYCHO15rus [73]

Answer:

1/3(n - 5) = -2/3

distribute 1/3

Step-by-step explanation:

I got it correct on edgen

5 0

2 years ago

Read 2 more answers

-1. The table shows the annual consumption of cheese per person in the United States for selected years in the 20th century. Let

olga nikolaevna [1]

<span>Using processing software (Excel) or even a decent scientific calculator. You input the values and generate the best fit cubic equation.
For number 1, the equation is
y = 8x10</span>⁻⁵ x³ - 0.0097 x² + 0.374 x + 1.083
where x is the number of years since 1900
y is the pounds cheese consumed

For number 2, the equation is
y = -3x10⁻⁵ x³ + 0.0028 x² + 0.2155 x + 1.7736

For number 3
P(-1) = 18

5 0

2 years ago

Need help please <br> It will be good if I get the answer as soon as possible please and thanks

Ahat [919]

Answer:

B 71 & 71

Step-by-step explanation:

OP is an angle bisector

3 0

2 years ago

Read 2 more answers

Jay is 3 years less than 4 times Nelly’s age ( n ). Which expression represents Jay’s age?