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
WARRIOR [948]
3 years ago
8

Please show me how to answer this

Mathematics
1 answer:
Makovka662 [10]3 years ago
3 0
Work on Both sides of the equation by doing the same thing on both sides. This will get your answer.
You might be interested in
If x+y=8, y+z=7, and x+z=5, what is the value of x? What is the formula or strategy to approach this question?
joja [24]

The strategy is to work from a system with three variables and three equations down to something with two variables and two equations. In a two variable-two equation system, you can use either substitution or elimination.

First, let's organize the equations.

(1) x + y = 8

(2) y + z = 7

(3) x + z = 5

Now, we'll solve one of (1), (2), and (3) for a variable. The choice is yours, but we'll use equation (3) and solve it for x.

x + z = 5

x = 5 - z.

Now we put this into equation (1). Why (1)? It's the only one of (1) and (2) with x.

x + y = 8

5 - z + y = 8

-z + y = 3

y - z - 3 to rearrange it.

Now look at this new equation - call it (4) and the original (2).

(4) y - z = 3

(2) y + z = 7

This is a system of two equations and two variables. Either substitution or elimination works here - let's use elimination because of the -z and +z.

y - z = 3

y + z = 7

We add them together and we have that 2y = 10. Divide on both sides and y = 5. One variable down, two to go.

Now we go back to original equation (2). Substitute y = 5 to find z.

y + z = 7

5 + z = 7

z = 2.

Two down, one to go. Since we know z = 2, let's put it into (3) and find x. (Equation (1) with y = 5 works fine as well.)

x + z = 5

x + 2 = 5

x = 3

Thus x = 3, y = 5 and z = 2.

3 0
3 years ago
Please answer please
IRISSAK [1]

Step-by-step explanation:

cos A = 16/20 = 4/5

tan A = 12/16 = 3/4

sin A = 12/20 = 3/5

4 0
3 years ago
30mL:45mL simplify the ratio
Elina [12.6K]
30ml:45ml\\\\\dfrac{30}{45}=\dfrac{30:5}{45:5}=\dfrac{6}{9}=\dfrac{6:3}{9:3}=\dfrac{2}{3}\\\\\boxed{30ml:45ml=2ml:3ml}
5 0
3 years ago
Read 2 more answers
Evaluate ƒ( x ) = x 2 + 1 for ƒ(10).
vlabodo [156]
F(x) = x^2 + 1  f(10)
f(10) = 10^2 + 1
f= 101
7 0
3 years ago
10. A taco stand sells tacos for $3.25 each. The stand’s expenses for the day are $210. Define your variables and write an inequ
makvit [3.9K]
X : number of tacos they sell per day. ...... profit = y = 3.25 × x - 210 ......inequality. y > 0. so. x > 210/3.25 = 840/13 = 64. ......so the taco stand must sell at least 65 tacos for making profit.
8 0
3 years ago
Other questions:
  • FAST......................
    8·1 answer
  • Solve for x. (Round your answer to two decimal places)<br><br> log x = -2
    15·2 answers
  • Please answer ASAP
    8·1 answer
  • A doctor ordered 300 ml of a 10% solution,but the pharmacy only has 5% and 25% solutions. How many millimeters of each solution
    13·1 answer
  • Solve the equation using the Properties of Equality: 15 = – 2
    6·1 answer
  • (-5)² =<br> -2³=<br> (-3) y el 5 chiquito arriba pero no me deja ponerlo =<br> (-2)⁴=<br> (-6)º=
    12·1 answer
  • What is the value of f(g(3))
    7·2 answers
  • B + 5/14 <br><br> b = 5/7<br> please help
    8·2 answers
  • Someone help me out. So the question is Distance = Rate x Time What is the distance traveled if it took me 3 hours to travel at
    7·1 answer
  • Urgent! Math! Can somebody answer 1-3 for me, pls!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!