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ratelena [41]
2 years ago
7

HELP!!! use cross multiplication

Mathematics
2 answers:
Tresset [83]2 years ago
6 0
Let x be the number of square feet to be mowed
215 square feet take 22 minutes
x square feet take 12 minutes

22x = 12 \times 215 \\ x = (12 \times 215)  \div 22
Georgia [21]2 years ago
6 0
29 square feet long I think
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The length of a metal rod is 9 3/4 feet. What is the length of 1/4 of the rod?
7nadin3 [17]

Answer:

2 \frac{5}{16}

Step-by-step explanation:

2 \frac{5}{16} × 4 = 9 3/4

9 3/4 × 1/4 = 2 5/16

I hope this helps!

3 0
2 years ago
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Express the number 20000 as a single digit integer times a power of 10
PolarNik [594]
The answer is 2 x 10^4 or 2 to the power of 4 (4th power) where;
2  x 10 x 10 x 10 x 10
2 x 10 =20
20 x 10= 200
200 x 10 = 2000
2000 x 10 = 20 000

Expressing a number to a single digit integer times a power of 10 is also writing a number in scientific form,where the number is multiplied by 10 to nth "power". Scientific notation is also called standard index form whereby, too large or too big numbers.
In writing the scientific notation of a number it follows this form: m x 10^n ( m is multiplied to 10 to the power of n)  where, m, the coefficient, is the real number and n is the exponent integer.<span><span /></span>

3 0
3 years ago
Suppose that a coin has been altered to come up heads 80% of the time. If many samples of 60 coin flips are taken, which of the
Zigmanuir [339]

60*80%=

60*0.8 = 48

 one of your choices should be 48 or something close to 48

7 0
3 years ago
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If a*b means 2a + b , then what is 2*5 ?
rewona [7]

To solve this problem you must apply the proccedure shown  below:

If (a)(b)=2a+b, you have that:

(2)(5)=(2)(2)+5=9

Because a=2 and b=5

Therefore, as you can see, the answer is: 9

5 0
3 years ago
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Find the percent of increase from 1.5 inches to 6 inches.
Komok [63]
Well, from 1.5 to 6 is a 4.5 difference.

now, if we take 1.5 to be the 100%, what is 4.5 off of it in percentage?

\bf \begin{array}{ccll}&#10;amount&\%\\&#10;\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\&#10;1.5&100\\&#10;4.5&p&#10;\end{array}\implies \cfrac{1.5}{4.5}=\cfrac{100}{p}\implies p=\cfrac{4.5\cdot 100}{1.5}
8 0
2 years ago
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