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slega [8]
4 years ago
10

Answer question below

Mathematics
1 answer:
vladimir1956 [14]4 years ago
7 0

Answer:

Sir there is no question below i could maybe help if you post the question

Step-by-step explanation:

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5y+4x=10.51 8y+3x=10.39
Phoenix [80]

Answer:

  (x, y) = (1.89, 0.59)

Step-by-step explanation:

Written in general form, the equations are ...

  4x +5y -10.51 = 0

  3x +8y -10.39 = 0

These can be solved using the cross-multiplication method to find ...

  ∆1 = (4)(8) -(3)(5) = 17

  ∆2 = (5)(-10.39) -(8)(-10.51) = 32.13

  ∆3 = (-10.51)(3) -(-10.39)(4) = 10.03

Then the values of the variables are ...

  x = ∆2/∆1 = 32.13/17 = 1.89

  y = ∆3/∆1 = 10.03/17 = 0.59

The solution is (x, y) = (1.89, 0.59).

7 0
3 years ago
Keith swam 50 72 meters in the swimming pool this morning. This
ruslelena [56]

Answer:

122.96 meters is the answer

Step-by-step explanation:

If you add you will get the answer

Hope it helpes

8 0
3 years ago
Please in need the answer fast
Lubov Fominskaja [6]
-5(b+c)

This answer works when you distribute and it will give you your original question
5 0
3 years ago
A psychology professor wants to know whether verbal ability is related to memory quality in current first-year students at her s
alexgriva [62]

Answer:

The  variable are

A and  B

Step-by-step explanation:

Generally we can define a variable as a name of a placeholder representing a value  now considering the option to be selected from we see that

    The students' verbal SAT scores is a variable  because it is a phrase or a place holder that represent a value (in the is case a  numerical value)  which the score its self

    The second option  The students' percentage of words that were correctly recognized on the original list is also a variable because it is a placeholder of a name (in this case a phrase ) that represented the actual value itself

  The  third option The 75 students is not a variable because it is not representing any value but itself is the value

  The  third option The 750 students is not a variable because it is not representing any value but itself is the value

8 0
3 years ago
Factor this trinomial <br><br> X^2 + 3x - 4
Svetlanka [38]

Answer:

(x - 1)(x + 4)

Step-by-step explanation:

What multiplies to (-4) but adds to (3)?

These two values are (4) and (-1). Therefore, these are the values that make up the factored trinomial.

x² + 3x - 4  ----->  (x - 1)(x + 4)

You can check your answer by expanding the factors. This is done by multiplying each term within the first parentheses by each term within the second parentheses.

(x - 1)(x + 4)  ----->  x² - 1x + 4x - 4  ----->  x² + 3x - 4

4 0
2 years ago
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