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prisoha [69]
2 years ago
12

When to use brackets or parentheses math?

Mathematics
1 answer:
Blababa [14]2 years ago
3 0
Pretend the < and > are brackets
I'll use an example. 5+5+2x = 2 < (3*2) -5>

basically, if you use an equation were something is in brackets, it's because the problem inside needs to be solved before the rest, but there is a part of the equation that needs to be used first inside the brackets. I don't know if that makes sense,but hope that helps, if not tell me what's confusing! 
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The ratio of red pens to black pens is 2:9, the ratio of black pens to blue pens is 5:4. Show less than 50% of the pens are blac
Svetradugi [14.3K]

Answer:

is that all?

Step-by-step explanation:

7 0
3 years ago
the school gets $5 for each T-shirt they sell at a fundraiser. They have a goal of raising $150. If $45 has been raised so far,
Xelga [282]
21 more T-shirts they need to sell.
8 0
3 years ago
The range of values for the sample mean that fall within 1 standard error of the mean in a sampling distribution is M39 to M43.
marusya05 [52]

The question is incomplete! The complete question along with answer and explanation is provided below.

Question:

The range of values for the sample mean that fall within 1 standard error of the mean in a sampling distribution is M = 39 to M = 43. What Is the mean of the sampling distribution, and what is the standard error

a) mean = 41, standard error = 2

b) mean = 39 or 43, standard error = 2

c) mean = 41, standard error = 4

e) the mean and standard error are unknowns

Given Information:  

Standard error = 1

Range of values = 39 to 43

Required Information:  

Mean and standard error = ?

Answer:

Mean is 41 and Standard error is 2

Explanation:

We know that the mean and standard error are related as

s = μ + (1)ο

s = μ - (1)ο

43 = μ + (1)ο

39 = μ - (1)ο

option (a) satisfies the above equations

43 = 41 + (1)2

43 = 43

39 = 41 - (1)2

39 = 39

Therefore, the correct option is (a)

Mean is 41 and standard error is 2

5 0
3 years ago
Jannete has 326 pennies, 64 nickles, and 15 dimes. if she has to exchange her coins for dollars how many dollars will she have ?
Vlad1618 [11]

Answer:

She will have 7 dollars, with 96 cents remaining.

Step-by-step explanation:

326 pennies is $3.26

64 nickels is $3.20

15 dimes is $1.50

Add them all;

$3.26 + $3.20 + $1.50 = $7.96

She will have 7 dollars, with 96 cents remaining

3 0
3 years ago
Students were asked to use the distributive property to write an equivalent expression for the expression (x-5)(x-2).
andre [41]

Answer:

x^2-7x+10

Step-by-step explanation:

the answer is x^2-2x-5x+10=

5 0
3 years ago
Read 2 more answers
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