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Setler [38]
4 years ago
11

Solve the system by substitution. x+y=3 y=x? -5x -5 -

Mathematics
1 answer:
Alinara [238K]4 years ago
8 0
X= 8/3, y= 17/3


Double check to see if it’s the right answer
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Find the rational zeros of the polynomial function, f(x)= 4x^3-8x^2-19x-7
Dima020 [189]

Answer:

The rational zero of the polynomial are \pm \frac{7}{4}, \pm \frac{1}{4},\pm \frac{7}{2},\pm \frac{1}{2},\pm 7,\pm 1  .  

Step-by-step explanation:

Given polynomial as :

f(x) = 4 x³ - 8 x² - 19 x - 7

Now the ration zero can be find as

\dfrac{\textrm factor of P}{\textrm factor Q} ,

where P is the constant term

And Q is the coefficient of the highest polynomial

So, From given polynomial ,  P = -7 , Q = 4

Now , \dfrac{\textrm factor of \pm P}{\textrm factor of \pm Q}

I.e  \dfrac{\textrm factor of \pm P}{\textrm factor of \pm Q} = \frac{\pm 7 , \pm 1}{\pm 4 ,\pm 2,\pm 1 }

Or, The rational zero are \pm \frac{7}{4}, \pm \frac{1}{4},\pm \frac{7}{2},\pm \frac{1}{2},\pm 7,\pm 1

Hence The rational zero of the polynomial are \pm \frac{7}{4}, \pm \frac{1}{4},\pm \frac{7}{2},\pm \frac{1}{2},\pm 7,\pm 1  .  Answer

7 0
4 years ago
How many times does 70 go into 1000?
Korvikt [17]
1000 goes into 70  excactly 14.2857143 times

8 0
4 years ago
(giving brainiest and all my points!!)
Vikki [24]

Answer:

1. 62

2. 13

3. 6

4. 18

5. 3

Step-by-step explanation:

1. Let's use pemdas

16*1/2= 8

32 / 4 * 8 - 2

8*8 - 2

64 - 2

= 62

2. Let's use pemdas

5*2/5 = 2

20 / 2 + 3

10 +3

= 13

3. Let's use pemdas

1/2 * 24 / 3 +2

12 / 3 +2

4 +2

=6

4. Let's use pemdas

2 * (6 / 2 + 8) -4

2 * 11 - 4

22 - 4

= 18

5. Let's use pemdas

(28 / 7 +6 / 3) * 1/2

( 4 + 2) *1/2

6 *1/2

= 3

8 0
3 years ago
Read 2 more answers
What is the selling price of an item if the original cost is $784.50 and the makeup on the item is 6.5%
kolezko [41]

I think what you meant to type is "markup".  If the markup is 6.5%, we need to increase the cost by that amount.  To find 6.5% of a number we convert it to a decimal, .065, and we add 1.00, to get 1.065.  The 1, when multiplied, gives us the original amount, and the .065 gives us the additional amount.  We multiply that by 784.5.  784.5 x 1.065 = 835.49.  The other way to do it is to just multiply by 0.065, and you get 784.5 x 0.065 = 50.99, then add it to the original amount, 784.5 + 50.99 = 835.49.

3 0
3 years ago
Read 2 more answers
when you buy a TV, the size refers to the diagonal. You have an empty square shaped space in your cabinet that is 2500 in. You w
S_A_V [24]
Hmm... I believe it's if u had 2599 cats taht means
6 0
3 years ago
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