1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alchen [17]
2 years ago
5

PLS HELP WITH 22 AND 23 ILL GIVE 10 POINTS OR PLSS

Mathematics
2 answers:
hoa [83]2 years ago
8 0

Answer:   (#22)  11 years old

Step-by-step explanation:

<em>The total ages of three students is 34. If the youngest student is 9 years younger than the oldest student, and the middle student is 4 years older than the youngest student, how old is the middle student?</em>

Ok let's call the students' ages a, b, and c. (a is the youngest, b is the middle, c is the oldest.) The problem tells us that

a + b + c = 34,

a = c - 9, and

b = a + 4.

We want to transform the first equation into just b's, because then we can solve for b and get the middle student's age. We're going to do this using substitution. So from the third equation, rearranging it yields a = b - 4, so now we substitute that for a in the first equation:

(b - 4) + b + c = 34.

Now we need to turn the c into something with b's. Well the second equation tells us a = c - 9, so c = a + 9. What now? Well maybe we could substitute b-4 for a in this equation to get

c = (b - 4) + 9

which means c = b + 5. So now we can substitute that to get

(b - 4) + b + (b + 5) = 34

3b + 1 = 34

3b = 33

b = 11,

So the middle student's age is 11.

Nitella [24]2 years ago
5 0

Answer:

I think 22 is 18 years old

You might be interested in
Find the distance between the points (-21, 17) and (33, 17)
Norma-Jean [14]
Plug it into the distance formula.

d= (sqrt) (x2-x1)^2 +(y2-y1)^2

d= (sqrt) (17-17)^2 + (33-(-21)^2
d=(sqrt) (0)^2 + (33 +21)^2
d= (sqrt) (54)^2
d= (sqrt) 2916
d=54

The distance is 54 units. 

I hope this helps!
~kaikers
7 0
3 years ago
Find the perimeter of a triangle with sides 12 inches, 9 inches, and 15 inches.
Artist 52 [7]
If its perimeter, it should be quite easy to find. Just add 12+9+15. Which equals 36. So the perimeter is 36 inches. -Hope it helps!
7 0
3 years ago
Read 2 more answers
Slope of (8,3) and (-4,3)
Mashutka [201]
Use the formula y2-y1/x2-x1.
3-3/-4-8
0/-12
The slope is 0, so the line is horizontal.
8 0
3 years ago
Read 2 more answers
How to solve intergers with 3 numbers
geniusboy [140]
If it's add you subtract if it's subtract you add
4 0
3 years ago
Which statements about the line that passes through (−2, 0) and (2, −4) are true? Select all that apply.
inn [45]

Your question is incomplete.

Answer choices not apply.

But if this is your question in the picture below then this is your answer..

Answer:

The line intersects the y-axis at (0, −2).

The equation of the line is y = −x − 2.

The line intersects the x-axis at (−2, 0).

Step-by-step explanation:  

6 0
2 years ago
Other questions:
  • Shelly and Terrence completed a different number of tasks in a game. Shelly earned 90 points on each task. Terrence's total poin
    9·2 answers
  • five friends split the cost of parking at an amusement park. Each of them also buys a $30 ticket.write an algebraic expression t
    15·1 answer
  • When multiplying terms with the same sign, we will get a _______ product.
    8·2 answers
  • Quadrilateral ABCD is transformed according to the rule (x,y) (y. -x). Which is another way to state the
    9·1 answer
  • Please help I really need it
    6·1 answer
  • Seven students joined the Math Club.a 7 b –7 c 0 d 14
    6·2 answers
  • BRAINLIEST if correct<br><br> 2.0
    9·2 answers
  • Find the exact value of sin A in simplest radical form. ​
    5·1 answer
  • A mass oscillating up and down on the bottom of a spring (assuming perfect elasticity and no friction or air resistance) can be
    9·1 answer
  • I need help please thanks​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!