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Inessa [10]
3 years ago
14

klaus was replacing the roof on his house. He used 420 nails to attach al the pieces of wood. Each piece of wood needed 7 nails

to hold it in place. He used 40 pieces of wood. How many pieces were left?
Mathematics
1 answer:
hjlf3 years ago
6 0

There were 20 pieces of wood left.


Work:

420 ÷ 7 = 60

60 - 40 = 20


Your answer is 20.


Hope this helps!

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List the PROs and CONs of using coal as a power source.
Anna11 [10]

Answer:

pros:Affordability,Known technologies,Safety.

cons:Greenhouse gas emissions,Mining destruction,Emission of harmful substances.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
______________ can hold multiple values within a single variable and is defined by having values between square brackets.
lorasvet [3.4K]

The term that completes the blank and fits the description is an array

<h3>How to complete the blank?</h3>

From the question, we understand that:

  • The variable term holds multiple values
  • It uses square brackets
  • it is defined by a single variable

The term that fits the above highlights is array

Hence, the complete statement is:

<em>array can hold multiple values within a single variable and is defined by having values between square brackets.</em>

Read more about arrays at:

brainly.com/question/22364342

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8 0
2 years ago
I’m stuck here please help !!!
Olin [163]

Answer:

1) element - a member of a set

2) inequality - <, <, \leq, \geq

3) line graph - visual tool used to illustrate solution sets

4) real number - positive or negative, rational or irrational numbers including                zero

5) set - a collection or group of sets indicated by brackets, {}

6) set builder notation - a shorthand way to write a set

Step-by-step explanation:

The definitions of each of the terms are as follows:

Element: In a set, each member is called its element.

Inequality: The term inequality is used to compare two values. The sign used for inequalities are <, <, \leq, \geq.

Line graph: It gives the solution on a number line. This is the pictorial or visual representation of the solution.

Real number: All numbers that are rational, irrational positive or negative values are called real numbers.

Set: A set is a collection of data that are enclosed in two curly brackets. The data can be numbers, sets, etc.

Set builder notation: It is a shorthand notation used to represent a given set. It defines the data inside the set using appropriate mathematical symbols.

8 0
3 years ago
HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
drek231 [11]

Answer:

C

Step-by-step explanation:

The rest are correlation

3 0
3 years ago
The wildflowers at a national park have been decreasing in numbers. There were 1200 wildflowers in the first year that the park
bonufazy [111]

Year      New flowers

1                 1200

2                 300

3                   75

There were 1200 wildflowers in the first year that the park started tracking them. Since then, there have been one fourth as many new flowers each year

Initially there are 1200 flowers and start decreasing by \frac{1}{4}

So first term is 1200 and common ratio is \frac{1}{4}.

Its a geometric sequence so summation becomes

i =1∑ ∞ 1200(\frac{1}{4})^{i-1}

Now we find the sum

We use sum formula

Sum = \frac{a}{1-r}

Where a is the first term , a= 1200

r is the common ratio , r= 1/4

Sum = \frac{1200}{1-(\frac{1}{4})}

Sum = \frac{1200}{\frac{3}{4}}

Sum = 1600 wildflowers

4 0
4 years ago
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