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Advocard [28]
2 years ago
12

20.

Mathematics
1 answer:
andriy [413]2 years ago
8 0

Answer:

an apple costs 0.24 and a pear costs 0.28

Step-by-step explanation:

      3a + 4p = 1.84                                 3a + 4p = 1.84

     -5a + 2p = 1.76   m(-2)               <u>   -10a - 4p = -3.52</u>

        3a + 4p = 1.84

 +<u>   -10a - 4p = -3.52</u>

       -7a          = -1.68

           a         = -1.68/-7

           a        =  0.24

   

       3a + 4p = 1.84

       3(0.24) + 4p = 1.84

       0.72  + 4p = 1.84

                   4p = 1.84 - 0.72

                    4p = 1.12

                      p = 0.28

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3z squared minus 6z if z = 5
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Answer:

45

Step-by-step explanation:

Given

3z² - 6z ← substitute z = 5 into the expression

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shepuryov [24]
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notka56 [123]
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Factor x^2-5x-24 i need help to figure this out
Mrac [35]

Answer:

(x-8)(x+3)

Step-by-step explanation:

1) Find out what are the factors of the constant?

2) Which of those add to equal the coefficient before the x value?

In this particular equation, we have the constant being 24. The first two factors that come to mind are 6 and 4, and 8 and 3. Since it is -24, we need one of these numbers to be negative.

Let's look at our "b" value, or the coefficient behind the x value, 5. Looking at our factors and thinking of addition (since one of them must be negative, it will most likely be subtraction instead of addition) I can see that

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which is one of the factors of -24.

This means that we can factor our equation using these numbers, getting us the following:

(x−3)(x+8)

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3 0
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