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n200080 [17]
3 years ago
9

They ratio of pencils to erasers is 4:1 if their are 20 pencils how many erasers are there

Mathematics
1 answer:
velikii [3]3 years ago
8 0
Let x be the number of erasers
4 = 20
1 = x

4x = 20

x = 5
 therefore there are 5 number of erasers 
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The length of one side of a square is 3n+2. The perimeter of the square is 4(3n+2). Which expression is equivalent to the perime
deff fn [24]

Answer:

4(3n + 2)

Step-by-step explanation:

as we know perimeter of a square is 4 x side

one side is 3n + 2

4 sides = 4(3n +2)

8 0
3 years ago
How do you do these 4 questions and the reasons?
Afina-wow [57]

Step-by-step explanation:

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False.  According to the 5 number summary, 25% of the flights are between -55 and 13.  So less than 25% of the flights are on time or early.

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4 0
3 years ago
For the function f(x)=3xsquared- 2x+5 find f(1) f(-2) and f(a)
Oksanka [162]
f(x)=3x^2-2x+5\\\\
f(1):\ \ Substitude\ 1 \ as\ x\ into\ function:\\
f(1)=3*1^2-2*1+5=3-2+5=\textbf{6}\\\\
f(-2)\ \ Substitude\ x=-2\\
f(-2)=3*(-2)^2-2*(-2)+5=3*4+4+5=12+4+5=\textbf{21}\\\\
f(a)\ \ substitude\ x=a\\
f(a)=\underline{3a^2-2a+5}
4 0
3 years ago
Sin^2xcsc^2x=sin^2x+cos^2x
Otrada [13]
The second part = 1

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3 0
3 years ago
6 is 3% of what number?
Aleks04 [339]

<span>✡ Answer: 200 </span><span>✡

- - Solve:

✡ First we need to find the formula to solve:
\frac{3}{100} * x=6


✡ Now:
x is equal to: \frac{100*6}{3}

</span>
<span>✡Now we are going to multiply 100*2 to get our answer.

- - 100*2=200 </span>


✡Hope this helps!<span>✡</span>







6 0
3 years ago
Read 2 more answers
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