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dmitriy555 [2]
3 years ago
7

Which system of linear equations has the ordered pair (4,5) as a solution​

Mathematics
1 answer:
Anna11 [10]3 years ago
4 0
3x-2y=22 and 2x+9y=-37. I thinnnnnnk! Hope that helps
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The Baker formula estimates the maximum heart rate, in beats per minute, of a person who is
seropon [69]

Answer:

For a=16, the Maximum Heart Rate is 188 Beats Per Minute.

Step-by-step explanation:

<em>To begin, we know that the formula:</em>

b(a)=200-0.75a    Eqn(1).

<u>is equivalent to a linear equation of algebraic form denoted as:</u>

y=k+mx                  Eqn(2)

<em>as such that  Eqns (1) and (2) relate as follow:</em>

y ⇔ b(a): denoting our Dependent Variable, in this case <em>Max. Heart Rate in Beats Per Minute</em>

x ⇔ a: is our Independent Variable<em>, </em>in this case the <em>Age of the Person</em>

m ⇔ 0.75: denoting the<em> Rate of Change of the Age.</em>

k ⇔ 200: denoting our <em>Constant.</em>

Now in the question our value of b(a) is given as 188 beats per minute, which by plugging in Eqn(1) gives:

200-0.75a=188

from which we can solve to obtain the value of a as follow:

-0.75a=188-200          Gather similar terms on each side

-0.75a=-12\\                   Simplify

a=\frac{-12}{-0.75}                           Solve for a

a=16

Which tells us that at the Age of 16, the Max. Heart Rate is 188 Beats Per Minute.

4 0
3 years ago
Determine the domain and range for each of the following:
LiRa [457]

Answer

Domain is the values x can be.

Range is the values y can be.

1st Graph)

D: -8 < x < 3

R:  3 < y < 9

2nd Graph)

D: -4<x<4

R: -4<y<4

3rd Graph)

-Note that this graph has an open and closed circle. Which means one is open and the other is closed on the interval. I will use brackets to make it easier.

D: [-4,3)

R: (-6,2)

6 0
3 years ago
(2x - 1)(3x2 - 4x + 5) multiply the polynomial <br><br>​
dmitriy555 [2]

Answer:

6x^3-11x^2+14x-5

Step-by-step explanation:

5 0
4 years ago
If 9x+10y=2 and -8x-6y=-10 are true equations, what would be the value of x + 4y?
qwelly [4]
Use elimination method to get -8

5 0
3 years ago
Is 3.5 a rational number
Olegator [25]

Answer:

Yes

Step-by-step explanation:

3.t can be written as a fraction, which is 7/2, so yes it is a rational number.

6 0
3 years ago
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