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SVEN [57.7K]
3 years ago
11

How how do you how do you estimate 4.23-2.51

Mathematics
2 answers:
Rus_ich [418]3 years ago
8 0
Hi CuteFace ! Estimating is an easier way to find out an answer ! To estimate this particular problem you have to round both the numbers so 4.23 would round to 4 and 2.51 would round to 3 . 4-3=1
scoray [572]3 years ago
5 0

Answer:

If you round it would be 4-3=? . If the decimal is above .50 then you would go up one number in the ones place if it is not then it stays the same.

Step-by-step explanation:

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3 years ago
Write all the factors of 21<br> Use commas to separate them.
Hatshy [7]

Answer:

1, 3, 7, 21

Step-by-step explanation:

1, 3, 7, 21

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7 0
2 years ago
Please help! provide thorough explanation and use elimination method!!
ICE Princess25 [194]

Multiply both sides of the second equation by 100 to get rid of the decimals:

0.05<em>n</em> + 0.10<em>d</em> = 1.50

==>  5<em>n</em> + 10<em>d</em> = 150

Multiply both sides of the first equation by -5:

<em>n</em> + <em>d</em> = 21

==>  -5<em>n</em> - 5<em>d</em> = -105

Add the two equations together:

(5<em>n</em> + 10<em>d</em>) + (-5<em>n</em> - 5<em>d</em>) = 150 + (-105)

Notice that the terms containing <em>n</em> get eliminated and we can solve for <em>d</em> :

(5<em>n</em> - 5<em>n</em>) + (10<em>d</em> - 5<em>d</em>) = 150 - 105

5<em>d</em> = 45

<em>d</em> = 45/5 = 9

Plug this into either original equation to solve for <em>n</em>. Doing this with the first equation is easiest:

<em>n</em> + 9 = 21

<em>n</em> = 21 - 9 = 12

So Donna used 12 nickels and 9 dimes.

8 0
3 years ago
How to Simplify. (–21 × 3) + (15 ÷ –3)
vladimir2022 [97]

Answer:

-68 is your answer

Step-by-step explanation:

Remember to follow PEMDAS (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction)

First, solve each parenthesis

(-21 x 3) = -63

(15/-3) = -5

Next, add

(-63) + (-5) = -63 - 5 = -68

-68 is your answer

~

5 0
2 years ago
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