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brilliants [131]
3 years ago
14

Explain how to write 28% as a rate per 100

Mathematics
1 answer:
harkovskaia [24]3 years ago
8 0
28% equals 28/100.  So, 28% equals 28 per 100.
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What are the solutions of this system of equations?
SpyIntel [72]

Answer:

Option C is correct.

Step-by-step explanation:

y = x^2-x-3     eq(1)

y = -3x + 5      eq(2)

We can solve by substituting the value of y in eq(2) in the eq(1)

-3x+5 = x^2-x-3

x^2-x+3x-3-5=0

x^2+2x-8=0

Now factorizing the above equation

x^2+4x-2x-8=0

x(x+4)-2(x+4)=0

(x-2)(x+4)=0

(x-2)=0 and (x+4)=0

x=2 and x=-4

Now finding the value of y by placing value of x in the above eq(2)

put x =2

y = -3x + 5

y = -3(2) + 5

y = -6+5

y = -1

Now, put x = -4

y = -3x + 5

y = -3(-4) + 5

y = 12+5

y =17

so, when x=2, y =-1 and x=-4 y=17

(2,-1) and (-4,17) is the solution.

So, Option C is correct.

7 0
3 years ago
Read 2 more answers
Helpppp pls. Rotate traingle TUV 90 degrees clockwise around the origin
lutik1710 [3]
T -1,-1 ect ect hope helps
7 0
2 years ago
Use the graph of the quadratic function y = - 1x2 + x + 4 to
True [87]

Answer: A, -2 and 4

Step-by-step explanation: cause it it you’re welcome

6 0
3 years ago
Two families go skiing on a Saturday. One family purchases three adult lift tickets and four lift tickets for $188. Another fami
Mnenie [13.5K]

Answer:using elimination to solve for x

9x +6y = 3*134    | Multiplying 1st equation by 3

-4x -6y = -2*146   | Multiplying 2nd equation by -2

   5x = 3*134 - 2*146

   5x = $110

    x = $22,  the cost of the youth ticket

Step-by-step explanation:This question Sets Up two equations with 2 unknowns        

Let x and y represent the cost of the youth and adult ticket respectively

Question states***

3x + 2y = $134    

2x + 3y = $146

7 0
3 years ago
The radius of this ball is 15 inches. Which equation gives the ball's surface area, in square inches?
lilavasa [31]

Best to look up the formula for the surface area of a sphere and then find it:

A = 4πr^2, where r is the radius of the sphere.  Then,

A = 4π(15 in)^2 = 4(3.14)(225 in^2) =  2826 in^2 (answer)

This is represented by the formula given in the lower left.

8 0
3 years ago
Read 2 more answers
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