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Stolb23 [73]
3 years ago
12

Which expression is equivalent to 73 ⋅ 7−5?

Mathematics
2 answers:
Alex787 [66]3 years ago
8 0
Expression for 73•7-5?

Answer is 506
nikklg [1K]3 years ago
5 0

Answer:

Expression for 73•7-5?

Answer is 506

Step-by-step explanation:

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It takes 20 hours to fill the pool using the first hose. It takes 16 hours to fill the pool using the second hose. How long woul
BARSIC [14]

Answer: 8 \frac{8}{9} hours

Step-by-step explanation:

Let x represent the time it takes if both are used.

The unit time it takes to fill the pool using the first house is 1/20 and also the unit time it takes to fill the pool using the second house is 1/16 , therefore:

1/16 + 1/20 = 1/x

\frac{4+5}{20} = \frac{1}{x}

\frac{9}{80} = \frac{1}{x}

Therefore

x = \frac{80}{9}

Therefore, it takes 8 \frac{8}{9} hours using both houses

6 0
4 years ago
Read 2 more answers
BRAINLIEST + POINTS!
sertanlavr [38]

Answer:

the correlation coefficient of the line of best fit  is, 0.98247.

Step-by-step explanation:

Correlation Coefficient are used to find how strong relationship between the data. It expressed its values between +1 and -1. It is represented by r.

* if 0<r<1 indicates a strong positive relationship.

* -1<r <0 indicates a strong negative relationship.

* r=0 indicates no relationship at all.

The formula for this :

r = \frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2-(\sum x)^2][n\sum y^2-(\sum y)^2]}}

Given the data: (-3, -40) , (1, 12), (5, 72) and (7,137)

Here, n = 4

To calculate the correlation coefficient r;

Substitute the values of data in above formla of r , as shown in the Figure 1:  

then;                  

r=\frac{4\cdot 1451-(10)(181)}{[4\cdot84-(10)^2][4\cdot 256977 -(181)^2]}

or    

r=\frac{5804-1810}{\sqrt{[336-100][102788 -32761]}}=\frac{3994}{\sqrt{[236][70027]}}

or

r=\frac{3994}{4065.26408} =0.98247

Therefore, the correlation coefficient r is, 0.98247 (Positive relationship)


6 0
3 years ago
What is the answer to this math problem -4.3g=25.8
SVETLANKA909090 [29]
You have to separate the coefficient, "-4.3" from the variable "g', by using the inverse operation then doing it to the other side. You would divide 25.8 by -4.3 to get -6 <--Answer
3 0
3 years ago
Dayson is covering a package in the shape of a rectangular prism with wrapping paper. The package is 50 centimeters by 20 centim
goblinko [34]
<span>Dayson has 1 m2 of wrapping paper, which is 10000 cm2:
 1 m = 100 cm
 1 m^2 = (100 cm)^2 
 </span>1 m^2 = 10000 cm^2
 <span>The package has a surface area of cm2:
 A = 2*(50*20) + </span>2*(50*18) + 2*(18*20)
 A = <span> <span>4520 cm^2
 </span></span>The area of the package is less than the area of the wrapping paper (4520 cm^2 < 10000 cm^2<span>). So, Dayson cover the package with the wrapping paper.</span>
3 0
3 years ago
Help help quick quick thanks
I am Lyosha [343]

Answer:

Factor

Step-by-step explanation:

Sum = Answer of an addition problem

Variable = a  or  b

The factor should answer the question

8 0
4 years ago
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