2 years ago

-5x - 7y=17 -8x - 5y = 21 solve the following system of equations

Mathematics

1 answer:

erik [133]2 years ago

6 0

Answer:

x= 17+7y/15 as a fraction

Step-by-step explanation:

x=21+5y/8 as a fraction

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Determine whether (18 + 35) × 4 = 18 + 35 ×4 is true or false. explain

fomenos

The first one is 212
and the second one is 158
so yes it is false they do not equal

6 0

3 years ago

Imagine a regression line that relates y = average systolic blood pressure to x = age. The average blood pressure for people 40

mart [117]

Answer:

2.0

Step-by-step explanation:

x = age

y = average systolic blood pressure

x₁ = 40 years old, y₁ = 110 systolic blood pressure

x₂ = 50 years old, y₂ = 130 systolic blood pressure

$\text{Slope of a line}=m=\frac{y_2-y_1}{x_2-x_1}\\\Rightarrow m= \frac{130-110}{50-40}\\\Rightarrow\frac{20}{10}\\\Rightarrow m= 2.0$

∴ Slope of the regression line is 2.0

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3 years ago

What is the solution to the equation below?

Radda [10]

I think c.
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8 0

3 years ago

PLEASE HELP ASAP!

Mamont248 [21]

Answer:

$(x-4)^2+(y+7)^2=43$

Step-by-step explanation:

The standard equation of a circle is given by:

$(x-h)^2+(y-k)^2=r^2$

Where (h, k) is the center and r is the radius.

We are given that the center is (4, -7) and that the radius is √(43).

So, h = 4, k = -7, and r = √(43). Substitute:

$(x-(4))^2+(y-(-7))^2=(\sqrt{43})^2$

Simplify. Hence, our equation is:

$(x-4)^2+(y+7)^2=43$

7 0

3 years ago

Which is the best answer to this question

sattari [20]

The answer is G, because you need to put the variables that go together with the same person.

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3 years ago