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aleksklad [387]
3 years ago
12

A quart of paint covers about 85 square feet. About how many quarts would you need to cover a fence with an area of 3,817 square

feet?
Mathematics
1 answer:
Vikentia [17]3 years ago
6 0

Answer:

you would need 45 quarts of paint

Step-by-step explanation:

if you divide 3,817 by 85 you would get 44.905882 but you need to only use whole number and if you chose 44 you would not have enough so you would round up to 45

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In the expression (x2 + 3), the base is
hichkok12 [17]
X is the base of the exponent.
8 0
3 years ago
The point B is at the centre of the circle. The pints P and Q are in the circumference of the circle. Calculate the area of the
Cerrena [4.2K]

Answer:

Area of the sector = 57.26295cm²

Step-by-step explanation:

Radius of the circle=9cm

π= 3.142

Angle at B= 81° ( opposite angle of a quadrilateral)

Area of the sector = πr² * 81/360

Area of the sector = 3.142 * 9*9 * 0.225

Area of the sector= 3.142*81*0.225

Area of the sector = 57.26295cm²

4 0
3 years ago
What is the value of the expression if m = –5 and n = 3? Negative StartFraction 24 Over 25 EndFraction Negative StartFraction 4
KatRina [158]

You can use the fact that  a number raised to negative powers can be written as 1 divided by that number raised to positive number.

The value of the given expression when m = -5 and n= 3 is -\dfrac{2}{5}

<h3>How can we rewrite a number raised to negative power?</h3>

Suppose we've got a^{-b} . then it can be rewritten as

a^{-b}  = \dfrac{1}{a^b}

It is because a^0 = 1 for any a except 0, and that  \dfrac{a^0}{a^b} = a^{0-b} = a^{-b}

If base are same and there is multiplication, then there will be addition in power.

Also, know the fact that if base are same and there is division, there will be subtraction in power(subtracting since that denominator when goes up, its power gets negated(gets negative sign to the existing power)

Thus,

a^b \timesa ^c = a^{b+c}\\\\\dfrac{a^b}{a^c} = a^{b-c}

<h3>Using above method to simplify the given expression before evaluating</h3>

The given expression is \dfrac{2m^{-1}n^5}{3m^0n^4} = \dfrac{2n^5}{3m^0m^1n^4} = \dfrac{2n^5}{3mn^4} = \dfrac{2n^{5-4}}{3m} = \dfrac{2n^1}{3m} = \dfrac{2n}{3m}

Putting m = -5 and n=3, we get:

\dfrac{2\times 3}{3 \times -5} = -\dfrac{2}{5}

Thus,

The value of the given expression when m = -5 and n= 3 is -\dfrac{2}{5}

Learn more about base and exponent(power) here:

brainly.com/question/847241

4 0
3 years ago
What is 25over60 can someone help me
Margarita [4]
Exact Form - 5/12
Decimal Form - 0.41666666...
3 0
3 years ago
Read 2 more answers
The endpoints of EF are E(xE , yE) and F(xF , yF). What are the coordinates of the midpoint of EF?
tatyana61 [14]

Answer:

The coordinates of the midpoint of EF is equal to

(\frac{xE+xF}{2},\frac{yE+yF}{2})

Step-by-step explanation:

we know that

The formula to calculate the midpoint between two points is equal to

M=(\frac{x1+x2}{2},\frac{y1+y2}{2})

In this problem we have

(x1,y1)=(xE,yE)

(x2,y2)=(xF,yF)

Substitute the values in the formula

M=(\frac{xE+xF}{2},\frac{yE+yF}{2})


7 0
3 years ago
Read 2 more answers
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