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3 years ago

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;

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

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

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

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]

Dayson has 1 m2 of wrapping paper, which is 10000 cm2:
1 m = 100 cm
1 m^2 = (100 cm)^2
1 m^2 = 10000 cm^2
The package has a surface area of cm2:
A = 2*(50*20) + 2*(50*18) + 2*(18*20)
A = 4520 cm^2
The area of the package is less than the area of the wrapping paper (4520 cm^2 < 10000 cm^2). So, Dayson cover the package with the wrapping paper.

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