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sergey [27]
3 years ago
8

how many pieces of string that are 2/7 of an inch long can be cut from a piece of string that are 7/8 of an inch long

Mathematics
1 answer:
Nimfa-mama [501]3 years ago
6 0

namely, how many times does 2/7 go into 7/8?

\bf \cfrac{7}{8}\div\cfrac{2}{7}\implies \cfrac{7}{8}\cdot \cfrac{7}{2}\implies \cfrac{49}{16}\implies 3\frac{1}{16}\impliedby \textit{3 whole times}

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How do you make 'a' the subject of the formula: ab - cd = ac
xxTIMURxx [149]
First bring all terms in 'a' to the left side of the formula by subtracting ac from both sides

ab - ac - cd = ac - ac 
ab - ac - cd = 0
now add cd to both sides
ab - ac -cd + cd = cd
ab - ac = cd
now factor the left side by taking out the 'a' 
a(b-c) = cd
now divide both sides by (b-c)
a = cd / (b-c)
done

3 0
3 years ago
One number is 16 more than a second number. The sum of the first number and twice the second number is 139. What is the answer ?
Nezavi [6.7K]
Answer first number  = 57  second number = 41
x= 16 + y
x + 2y = 139

16+ y + 2y =139
16 + 3y =139
16-16 +3y = 139-16
3y = 123
3/3y = 123/3
y= 41

x= 16+y
x = 16+41
x= 57
4 0
3 years ago
Multiply and reduce 4x^2/3*(9/x)3
Lilit [14]
So you follow the steps and i hope this will be easy for you .

4 0
3 years ago
PLEASE HELP I FORGOT EVERYTHING
Phantasy [73]

\huge{\textbf{\textsf{{\color{navy}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}

\frac{2}{x}  =  \frac{5}{3}

By doing cross multiplication.

6 = 5x \\  x = \frac{6}{5}  \\ x = 1.2

  • Thanks
  • Hope it helps
  • Pls mark as brainliest
6 0
2 years ago
Read 2 more answers
When Gabriella runs the 400 meter dash, her finishing times are normally distributed with a mean of 79 seconds and a standard de
kupik [55]

Answer:

(78, 80)

Step-by-step explanation:

Given a normal distribution :

Mean = 79 seconds

Standard deviation = 0.5 seconds

Using the empirical rule :

95% of her finishing times :

According to the empirical rule, 95% represents 2 standard deviations from the mean that is ± 2 standard deviations from the mean score or value.

Hence ;

The interval will be defined as ;

Mean ± 2(standard deviation)

79 ± 2(0.5)

79 ± 1

(79 - 1) ; (79 + 1)

78 ; 80

4 0
3 years ago
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