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Artyom0805 [142]
3 years ago
14

What is a correct way to evaluate the expression 80 - (50 – 35)?

Mathematics
2 answers:
Svetach [21]3 years ago
6 0

Answer:

PEMDAS!!! (Parentheses, exponents, multiplication, division, addition, subtraction)

Step-by-step explanation:

Parentheses first!

50-35=15

Then subtraction!

80-15=65

Hope this helped!!! :)

PSYCHO15rus [73]3 years ago
6 0

Answer:

65

Step-by-step explanation:

According to PEMDAS, you need to deal with <em>parenthesis </em>first

50-35 = 15

Now you need to <em>multiply, </em>or <em>distribute</em> the negative sign

-(15) becomes -15

Finally, you need to <em>subtract </em>15 from 80

80-15 = 65

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Monica’s lemon cookie recipe calls for 3 cups of sugar. How much much to make 4 1/2 Batches of cookies.
Alex

Answer:  13 & 1/2 cups of sugar

Whole part = 13

Fractional part = 1/2

===================================================

Explanation:

4 & 1/2 = 4 + 1/2 = 4 + 0.5 = 4.5

1 batch = 3 cups sugar

4.5*(1 batch) = 4.5*(3 cups sugar)

4.5 batches = 13.5 cups of sugar

The decimal number 13.5 converts to the mixed number 13 & 1/2 which is the same as writing 13  1/2

8 0
3 years ago
Which set does 7 belong too
Zina [86]

The number that 7 belongs to is a rational number.

<h3>What is a rational number?</h3>

It should be noted that a rational number is a number that is expressed as the ratio of two integers.

In this case, the denominator should not be equal to zero, whereas an irrational number cannot be expressed in the form of fractions.

Rational numbers are terminating decimals but irrational numbers are non-terminating and non-recurring.

Therefore, the number that 7 belongs to is a rational number.

Learn more about numbers on:

brainly.com/question/4619309

#SPJ1

7 0
2 years ago
X + (3x - 4) = 5 - (-7 - 3x)
antiseptic1488 [7]

Answer:

x = 16

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

Distributive Property

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

x + (3x - 4) = 5 - (-7 - 3x)

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

  1. [Distributive Property] Distribute negative:                                                    x + 3x - 4 = 5 + 7 + 3x
  2. [Addition] Combine like terms:                                                                        4x - 4 = 12 + 3x
  3. [Subtraction Property of Equality] Subtract 3x on both sides:                      x - 4 = 12
  4. [Addition Property of Equality] Add 4 on both sides:                                     x = 16
8 0
3 years ago
Complete the steps to solve the polynomial equation x3 – 21x = –20. According to the rational root theorem, which number is a po
Artist 52 [7]
X^3 - 21x = -20add 20 to both sidesx^3 - 21 x + 20 = 0Rational Root Theorem:Factors of P (constant) 20 = 1, 2, 4, 5, 10, 20-------------------------------      Factors of Q (leading Coefficient) = 1
Possible zeros (all + -) 1/1, 2/1, 4/1, 5/1, 10/1, 20/1
Of the choices given only the number 1 is a possible root.

4 0
4 years ago
Read 2 more answers
Please hurry!
Blizzard [7]

Answer:

1) A bar diagram with 2 shaded squares and 8 unshaded squares.

Step-by-step explanation:

There are 100 students (40+15+20+25).

20 signed up for Track and Field.

20 out of 100 would equate to 20/100, or 2/10, or:

1) A bar diagram with 2 shaded squares and 8 unshaded squares.

6 0
3 years ago
Read 2 more answers
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