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GenaCL600 [577]
3 years ago
14

Tina noticed that she had taken notes on 25 pages of her notebook. 95 pages were still blank. Write and solve a subtraction equa

tion to find the total number of pages
Mathematics
1 answer:
castortr0y [4]3 years ago
5 0
25+95=120 25(notes on)=95(no notes on)=120 total
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3 years ago
use the elimination method to solve the system of equations.choose the correct ordered pair. -3y=x-5 x+5y=7. ​
Paraphin [41]

Answer:

<h2>B. (2, 1)</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}-3y=x-5&\text{subtract x from both sides}\\x+5y=7\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-x-3y=-5\\x+5y=7\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad2y=2\qquad\text{divide both sides by 2}\\.\qquad\qquad y=1\\\\\text{Put the value of y to the second equation:}\\x+5(1)=7\\x+5=7\qquad\text{subtract 5 from both sides}\\x=2

5 0
3 years ago
Solve the equation for x^2=<br> 625
docker41 [41]

Answer:

x = ±25

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>

  • Multiple Roots

Step-by-step explanation:

<u>Step 1: Define</u>

x² = 625

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Square root both sides:                    x = ±25

<u>Step 3: Check</u>

<em>Plug in x into the original equation to verify it's a solution.</em>

x = -25

  1. Substitute in <em>x</em>:                    (-25)² = 625
  2. Exponents:                          625 = 625

Here we see that 625 does indeed equal 625.

∴ x = -25 is a solution to the equation.

x = 25

  1. Substitute in <em>x</em>:                    25² = 625
  2. Exponents:                          625 = 625

Here we see that 625 does indeed equal 625.

∴ x = 25 is a solution to the equation.

8 0
3 years ago
HURRY WILL GIVE BRANLIEST!!!!!!!
Ilia_Sergeevich [38]

Answer:

√17

Step-by-step explanation:

An irrational number is a number that cannot be expressed as a ratio of two integers. Or in other words, an irrational number can't be expressed as a fraction. You really cant divide one integer by another integer to get √17, so that makes it an irrational number.

8 0
3 years ago
Reba needs to simplify the expression below.
Lera25 [3.4K]
There are no visible parenthasees or exponents

so pemdas
mutipcation or division whichever comes first (because division is multiplying by a fraction)

61/2
so fist is division

D is answer
5 0
3 years ago
Read 2 more answers
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