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nevsk [136]
3 years ago
10

Substitution -2x+5y=19 and 3x-4=y

Mathematics
1 answer:
Feliz [49]3 years ago
3 0

Answer:

x = 3, y = 5

Step-by-step explanation:

Substitute 3x-4 for y, giving you -2x+5(3x-4)=19

Simplify both sides of the equation for 13x-20=19

Add 20 to both sides for 13x=39

x = 3

Substitute x into 3x-4

3(3)-4

9-4

y = 5

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Plz help due tonight
Assoli18 [71]
It is 1. 2 and 3 are base angles.
4 0
3 years ago
Please help me! <br> Will give brainlst :)
sergey [27]

Answer:

12. 6.4

13. 20

Step-by-step explanation:

This is the Pythagorean theorem, which says a^2+b^2=c^2. So for problem 12 we have 4^2+5^2=c^2. Since, 16+25=41, c=sqrt41 which is about 6.4. For problem 13 we have 15^2+b^2=25^2. Since 25^2-15^2=400, b=sqrt400 which is 20. Hope this helps!

8 0
3 years ago
Read 2 more answers
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REY [17]

The true statement about the graph of the function f(x) = x3 - 2x2 + 4x – 8 is (B) The function has 1 real zero that occurs 1 time.

<h3>How to determine the true statement</h3>

The function of f(x) is represented as:

f(x)=x^3-2x^2+4x-8

Differentiate the function f(x)

f'(x)=3x^2-4x+4

Calculate the minimum value using:

x = -\frac b{2a}

So, we have:

x = -\frac {-4}{2*3}

x = \frac {2}{3}

Substitute 2/3 in f'(x)

f'(2/3)=3*(2/3)^2-4(2/3)+4

f'(2/3)=\frac 83

The value of f'(2/3) is greater than 0.

This means that the function f(x) has 1 real zero, and it occurs once at point (2,0)

Hence, the true statement is (b)

Read more about functions at:

brainly.com/question/13136492

3 0
3 years ago
To increase an amount by 24% what single multiplier would you use?
cricket20 [7]

Let x be the original amount.

Increasing x by 24% means to add 24% of x to the original amount x.

x + 24% of x = x + .24x = 1x + .24x = 1.24x.

Therefore, to increase a given amount by 24% then multiply the original amount by a single factor of 1.24 .

4 0
4 years ago
Read 2 more answers
PLEASE HELP AND SHOW WORK ​
mariarad [96]

Answer:

13. It is a paralellogram, because its opposite sides are equal & parallel

14. It is a paralellogram , because it's two diagonals bisect each other .

15. Is a paralellogram, cause its opposite angles are equal

Step-by-step explanation:

3 0
3 years ago
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