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Leokris [45]
3 years ago
14

At a sale, shirts were sold for $15 each. This price was 80% of their original price. What was the original price?

Mathematics
2 answers:
slava [35]3 years ago
7 0

Answer:

12 dollars 80% divided by 15 dollars

Step-by-step explanation:

ipn [44]3 years ago
4 0

Answer: it should be 18.75 if thats even a answer if not then what ones do u has

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It would be a right angle
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Find the value of x in the triangle
AURORKA [14]
Cos38 = 7,8/x
X= 7,8/cos38
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What is 2and 2/3 divided by 4/5
Illusion [34]

Answer:

\frac{10}{3}  

I hope this helps!

5 0
3 years ago
A rock is launched from a cannon. After 1 second, the rock is 58 feet in the air; after 2 seconds, it is 112 feet in the air. Us
max2010maxim [7]

Answer:

Step-by-step explanation: This is the quadratic function:

h(x)=ax²+bx+c

We have two points:

(1,58)

(2,112)

Now, we calculate this quadratic funtion.

we assume that h(0)=0

Therefore:

a(0)²+b(0)+c=0

c=0

(1,58)

a(1)²+b(1)=58

a+b=58  (1)

(2,112)

a(2)²+b(2)=112

4a+2b=112

2a+b=56  (1)

With the equations (1) and (2) we make a system of equations:

a+b=58

2a+b=56

we can solve this system of equations by reduction method.

-(a+b=58)

2a+b=56

---------------------

a=-2

-2(a+b=58)

2a+b=56

-------------------

      -b=-60  ⇒  b=60

The function is:

h(x)=ax²+bx+c

h(x)=-2x²+60x

Now find the height, in feet, of the rock after 10 seconds in the air.

h(10)=-2(10)²+60(10)

h(10)=-200+600=400

Answer: 400 ft.

8 0
3 years ago
Acellus
aksik [14]

9514 1404 393

Answer:

  {-8, -4, -2, -1, 1, 2, 4, 8}

Step-by-step explanation:

Possible rational roots are positive and negative divisors of the constant 8:

  {-8, -4, -2, -1, 1, 2, 4, 8}

_____

<em>Additional comment</em>

This polynomial has no rational roots. Its two real roots are both negative and irrational.

7 0
3 years ago
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