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weeeeeb [17]
4 years ago
5

Simple pre algebra please help​

Mathematics
2 answers:
topjm [15]4 years ago
7 0

Answer:25.12

Step-by-step explanation:

0.5*(4*4*3.14)=25.12

stellarik [79]4 years ago
3 0

method: since it's half a circle, find the area of the circle and half it.

a = \pi \times r ^{2}

3.14 × 4^2 = 3.14×16 = 50.24sq yards

ans= 50.24/2 = 25.12sq yards

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Left Witch needs 3.25 gallons of "Toe of Frog" in her potion. If she can get half a gallon for $2.50, how much will she spend
Sladkaya [172]

Answer:

$16.25

Step-by-step explanation:

Half a gallon for $2.50 is the same as a quarter a gallon for $1.25.

If she needs 3.25 gallons, which is 13 quarters, we do $1.25 * 13 = $16.25.

Therefore, she will spend $16.25.

6 0
2 years ago
Find the value of x in each of the following<br>a) 5x/2+ 1 = 11<br>b) 2x/7 – 3 = 2​
laila [671]

Answer:

A) x=4

B) x=35/2

Step-by-step explanation:

calculate the product

A) 5x/2+1=11

multiply both sides of the equation by 2

5x+2=22

move the constant to the right hand side and change its sign

5x+22-2

now subtract the numbers

5x=20

now didvide both sides

5x=20

x=4

B)

calculate the product

2x/7-3=2

multiply both sides of the equation by 7

2x-21=14

move the constant to the right hand side and change its sign

2x=14+21

add the numbers

2x=35

now divide both sides of the equation by 2

x=35/2

8 0
3 years ago
72 students is 90% of how many students?
mixas84 [53]
90\% \cdot x = 72\\\\ 0.9x=72 \ |:0.9

x= 80 students

Answer:
80
4 0
4 years ago
Basically into to trig , pre calc
navik [9.2K]
There’s a Pythagorean triple and then draw it out the sides and then figure out the angles from the sides simple because of a direct relationship with quantity. And then the smallest angle is the one across from 3 so you start with three and then the hypotenuse is 5 so it’s 3/5 because sine=opposite/hypotenuse.
5 0
3 years ago
Suppose a normal distribution has a mean of 26 and a standard deviation of 4. What is the probability that a data value is betwe
lions [1.4K]

Answer:

20.3%

Step-by-step explanation:

7 0
4 years ago
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