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Zepler [3.9K]
3 years ago
5

Y=6x+7 3x - 8y = 4 Substitute?

Mathematics
1 answer:
Rudik [331]3 years ago
3 0

Answer:

Y=1, X= -(4/3)

Step-by-step explanation:

Y=6X+7

3X-8Y=4

Substitute Y=6X+7

3X-8Y=4

3X-8(6X+7)=4

3X-48X-56=4

-45X-60=0, therefore 45X=-60=X=-4/3

Sub. X values in Equation

Y=6X+7

=6(-4/3)+7, therefore Y=-1

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Reduce 22/30 to lowest terms and write the numerator in the blank
Zielflug [23.3K]

Answer:

11/15

Step-by-step explanation:

22/30 = 11/15 because they both have a common factor of 2 in the numerator and denominator.

4 0
3 years ago
Help fast please lol
igomit [66]

Answer:

Between 0 and 3: decreasing

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Between 4 and 8: decreasing

Step-by-step explanation:

6 0
2 years ago
Triangle DEF has vertices D(0,0), E(7,0), and F(3,7).
Leni [432]

Answer:

(3, 1.7)

Step-by-step explanation:

The point at which the vertices of a triangle meet is known as the orthocenter of the triangle. The orthocenter passes through the vertex of the triangle and is perpendicular to the opposite sides.

Two lines are perpendicular if the product of their slopes is -1.

The slope of the line joining D(0,0), F(3,7) is:

m_1=\frac{7-0}{3-0}=\frac{7}{3}

The slope of the line perpendicular to the line joining D and F is -3/7. The orthocenter is perpendicular to the line joining D and F and passes through vertex E(7, 0). The equation is hence:

y-y_1=m(x-x_1)\\\\y-0=-\frac{3}{7} (x-7)\\\\y=-\frac{3}{7}x+3 \ .\ .\ .\ (1)

The slope of the line joining E(7,0), and F(3,7). is:

m_1=\frac{7-0}{3-7}=-\frac{7}{4}

The slope of the line perpendicular to the line joining E and F is 4/7. The orthocenter is perpendicular to the line joining E and F and passes through vertex D(0, 0). The equation is hence:

y-y_1=m(x-x_1)\\\\y-0=\frac{4}{7} (x-0)\\\\y=\frac{4}{7} x\ .\ .\ .\ (2)

The point of intersection of equation 1 and equation 2 is the orthocenter. Solving equation 1 and 2 simultaneously gives:

x = 3, y = 1.7

4 0
2 years ago
Part C
KatRina [158]

Answer:500(1.2)^x

Plato :)

5 0
2 years ago
Read 2 more answers
If the area of the circle is 28 in^2,what is the area of the shaded sector with 90 degree angle?
Nutka1998 [239]
That would be 1/4 * 28  = 7 ins^2
7 0
2 years ago
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