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
gogolik [260]
3 years ago
10

When evaluating the following expression, which should you do first? 45 ÷ (9 - 4)

Mathematics
2 answers:
xenn [34]3 years ago
7 0
Start with the parentheses 9-4=5

then bring down the 45 / 5= 9
Viefleur [7K]3 years ago
6 0
You should always do the parentheses first
You might be interested in
Solve for x under the assumption that x>0. x-70/x<-3
Reika [66]
<span><span>x=0,<span>√70</span>,<span>−<span>√70</span></span></span><span>x=0,70,<span>-⁢70</span></span></span><span>x≈0,8.36660026,<span>−<span>8.3666002</span></span></span>
6 0
3 years ago
Ammonia (NH3) readily dissolves in water to yield a basic solution
natita [175]
I think it’s Arrhenius acid I’m not so sure
8 0
3 years ago
Solve the system of linear equations.
sweet-ann [11.9K]

Answer:

  • dependent system
  • x = 2 -a
  • y = 1 +a
  • z = a

Step-by-step explanation:

Let's solve this by eliminating z, then we'll go from there.

Add 6 times the second equation to the first.

  (3x -3y +6z) +6(x +2y -z) = (3) +6(4)

  9x +9y = 27 . . . simplify

  x + y = 3 . . . . . . divide by 9 [eq4]

Add 13 times the second equation to the third.

  (5x -8y +13z) +13(x +2y -z) = (2) +13(4)

  18x +18y = 54

  x + y = 3 . . . . . . divide by 18 [eq5]

Equations [eq4] and [eq5] are identical. This tells us the system is dependent, and has an infinite number of solutions. We can find them in terms of z:

  y = 3 -x . . . . solve eq5 for y

  x +2(3 -x) -z = 4 . . . . substitute into the second equation

  -x +6 -z = 4

  x = 2 - z . . . . . . add x-4

  y = 3 -(2 -z)

  y = z +1

So far, we have written the solutions in terms of z. If we use the parameter "a", we can write the solutions as ...

  x = 2 -a

  y = 1 +a

  z = a

_____

<em>Check</em>

First equation:

  3(2-a) -3(a+1) +6a = 3

  6 -3a -3a -3 +6a = 3 . . . true

Second equation:

  (2-a) +2(a+1) -a = 4

  2 -a +2a +2 -a = 4 . . . true

Third equation:

  5(2-a) -8(a+1) +13a = 2

  10 -5a -8a -8 +13a = 2 . . . true

Our solution checks algebraically.

6 0
3 years ago
Simplify this problem
Helga [31]

Answer:

c^2 +17c -5

Step-by-step explanation:

I like to line them up vertically

2c^2 +7c - 1

- (c^2 -10c+4)

----------------------

Distribute the minus sign

2c^2 +7c - 1

- c^2 +10c-4

----------------------

c^2 +17c -5

8 0
3 years ago
Can anybody help me with this
valkas [14]
I'll only help if you go help a settlement
4 0
3 years ago
Other questions:
  • If f(x) = -8x - 4 and g(x)
    12·2 answers
  • A line passing through the point (-2,1) and has a slope of 5/2. write an equation in point-slope form for this line.
    15·2 answers
  • An identification code is to consist of 3 letters followed by 2 digits. Determine the following
    7·2 answers
  • The sum of number y and sixty-one
    10·2 answers
  • What is the Square root of 485?
    12·2 answers
  • Find a number that has exactly 7 different prime factors. Explain how you found it.
    11·1 answer
  • Express - 64 by 112 as a rational number with denominator 7​ .plz answer fast so l will follow you .
    9·2 answers
  • Write and solve a story problem about gathering three kinds of vegetables. Use 10 partners.
    10·1 answer
  • How would you describe the graph for the equation lxl=2 ?
    5·1 answer
  • Paige is working on an art project. She draws two rectangles that are connected. The total area of the two rectangles is 56 cent
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!