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
k0ka [10]
3 years ago
8

Please help with 2. 3. and 4.

Mathematics
2 answers:
Y_Kistochka [10]3 years ago
6 0

Answer:

2. Since it is equilateral, we just set up an equation with using any two sides (since they are all equal)

12x - 22 = 10x - 6

12x - 10x - 22 = -6

2x - 22 = -6

2x = 22 - 6

2x = 16

x = 16/2

x = 8

Each side = 74

3. Same formula for this. Get any two sides and setup the equation.

4x - 25 = x + 14

4x - x - 25 = 14

3x = 25 + 14

3x = 39

x = 39/3

x = 13

Each side = 27

4. This one is also simple. Since DE = EF. We substitute its sides with the equations.

8x - 13 = 5x + 17

8x - 5x - 13 = 17

3x - 13 = 17

3x = 17 + 13

3x = 30

x = 30/3

x = 10

DE and EF = 67

DF = 31

Mashcka [7]3 years ago
5 0

Answer:

Step-by-step explanation:

You might be interested in
In how many different ways can 5 books be arranged on a shelf?
lions [1.4K]
Permutation:

5! = 5 * 4 * 3 * 2 * 1 = 120
7 0
3 years ago
Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
iragen [17]

Answer:

36.25

Step-by-step explanation:

The three in 20.342 has a value of 0.3, so a three one hundred times greater would be 0.3 times 100, which is 30.

Next, find the choice that has a three in the ten's place, which represents a 30.

5 0
3 years ago
Simplify the expression
natka813 [3]

Answer:

its B bro come on

Step-by-step explanation:

ok good

4 0
3 years ago
Solve the system:<br> -5x+6y=55<br> 4x+3y=34<br><br> Write down your solution.
svetlana [45]

Answer:

(1, 10)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define Systems</u>

-5x + 6y = 55

4x + 3y = 34

<u>Step 2: Rewrite Systems</u>

4x + 3y = 34

  1. Multiply everything by -2:                    -8x - 6y = -68

<u>Step 3: Redefine Systems</u>

-5x + 6y = 55

-8x - 6y = -68

<u>Step 4: Solve for </u><em><u>x</u></em>

<em>Elimination</em>

  1. Combine equations:                    -13x = -13
  2. Divide -13 on both sides:             x = 1

<u>Step 5: Solve for </u><em><u>y</u></em>

  1. Define equation:                    4x + 3y = 34
  2. Substitute in <em>x</em>:                       4(1) + 3y = 34
  3. Multiply:                                  4 + 3y = 34
  4. Isolate <em>y</em> term:                        3y = 30
  5. Isolate <em>y</em>:                                 y = 10
4 0
2 years ago
For a science experiment Marcia dissolved 1.0 kilogram of salt in 3.0 liters of water. For a different experiment, Bobby dissolv
nekit [7.7K]
Marcia dissolved 1 kg of salt in 3 litres of water.
Bobby dissolves 2 pounds of salt in 7 pints of water
2.11 pints = 1 litre
7 pints = 7/2.11
           = 3.32 litre
1 pound =0.45 kg
2 pound = o.45*2 kg
               = 0.9 kg
So we find that Bobby is dissolving 0.9kg of salt in 3.32 litre of water
Marcia is dissolving 1 kg of salt in 3 litres of water.
5 0
3 years ago
Other questions:
  • Wes lives in Colorado, which has a state income tax
    15·1 answer
  • OK, so I'm really bad at Math so Help me with my math plz..
    15·1 answer
  • NEED ANSWER QUICKLY
    13·1 answer
  • 2y-4x=-12 what is the slope intercept
    8·2 answers
  • John planned to pack 1/2 of his books in the morning and the rest in the afternoon. If he packed only 3/4 as many as he packed i
    13·1 answer
  • Please help me with #10 and #11, will mark brainliest.
    12·1 answer
  • Find the absolute value.<br> 21 1/3
    6·1 answer
  • Indentify the terms coefficients, and constants in each expression
    10·2 answers
  • Find the perimeter of the figure.
    12·2 answers
  • Why does the square root of 3 x the square root of 3 = 3?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!