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3 years ago

Please answer as fast as you can. what is 30 + 5(2x -1) + 20

Mathematics

2 answers:

omeli [17]3 years ago

7 0

Answer:

10x + 55

Hope this helps :)

lozanna [386]3 years ago

5 0

the answer is 40 brainliest plz

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A librarian has 170 books to pack into boxes. On Monday she packed 48 books and on Tuesday she packed 56 books. How many more bo

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48+56=104; 170-104= 66. The librarian needs to pack 66 more books.

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4 years ago

Angles L and M are supplementary. What is the sum of their measures? The sum of the measures of angles L and M is

Reil [10]

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3 years ago

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How to add fractions with unlike denominators?

Ainat [17]

Change the fractions so they have common denominators. For example. If adding 4/8 + 2/3, a common denominator of the two could be 24. Change both fractions to have a denominator of 24. To do this:

(4/8)×(3/3)= 12/24
(2/3)×(8/8)=16/24

Now that both fractions have denominators of 24, you can simply add the numerators to get your answer. in this case, it would be 28/24

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3 years ago

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The water level in a lake was monitored and was noted to have changed -2 1/3 inches in one year. The next year it was noted to h

Diano4ka-milaya [45]

Answer:

The total change in water level over the past 2 years is $\displaystyle -4 \frac{1}{6}$ .

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Fractions

Proper and Improper

Numbers

Least Common Multiple (LCM)

Step-by-step explanation:

Step 1: Define

Identify

Year 1 water change: $\displaystyle -2 \frac{1}{3}$

Year 2 water change: $\displaystyle -1 \frac{5}{6}$

Step 2: Find Total Water Change

[Set up] Add yearly water changes: $\displaystyle -2 \frac{1}{3} + -1 \frac{5}{6}$
[Fractions] Convert to improper: $\displaystyle \frac{-7}{3} - \frac{11}{6}$
[Fraction] Rewrite [LCM]: $\displaystyle \frac{-14}{6} - \frac{11}{6}$
[Order of Operations] Subtract: $\displaystyle \frac{-25}{6}$
[Fraction] Convert to proper: $\displaystyle -4 \frac{1}{6}$

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3 years ago

Quadrilateral $ABCD$ has right angles at $B$ and $D$, and $AC=3$. If $ABCD$ has two sides with distinct integer lengths, then wh

Jet001 [13]

Answer:

34 is the answer

Step-by-step explanation:

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3 years ago

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