Please help! Trying to figure out how to do this two problems!

The value of 'k' for the given system of equation that coincides  is 4

k=4

Given :

System of equations

[tex]2x+y=40 \\kx+2y=80[/tex]

The given equation is in the form of ax+by=c

When the two lines coincides then

[tex]\frac{a_1}{a_2} =\frac{b_1}{b_2} =\frac{c_1}{c_2}[/tex]

Lets make the coefficients proportional to each other and then solve for k

[tex]\frac{2}{k} =\frac{1}{2} =\frac{40}{80} \\\frac{2}{k} =\frac{1}{2} =\frac{1}{2} \\\\\frac{2}{k} =\frac{1}{2} \\4=k\\k=4[/tex]

The value of k from the given system of equation is 4

When the line coincides then the value of k is 4

Learn more :  brainly.com/question/24022234

Answer:

[tex]7^{14}[/tex]

Step-by-step explanation:

Using the rule of exponents

[tex]a^{m}[/tex] × [tex]a^{n}[/tex] = [tex]a^{(m+n)}[/tex] , then

[tex]7^{6}[/tex] × [tex]7^{8}[/tex] = [tex]7^{(6+8)}[/tex] = [tex]7^{14}[/tex]

Answer:

ok im telling people to help u because i dont know that xd

Step-by-step explanation:

50 - 6 = 44

44 / 4.50 = 9.77777778 ( 9 sandwich cuz u can get 0.77777778 of a sandwich.)

He can buy 9

Answer:

e i think

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

Answer:

2,929.3π cm^3

Step-by-step explanation:

Answer:

y - 9 = 1/8(x - 1)

Step-by-step explanation:

m = (10 - 9)/(9 - 1) = 1/8

y - 9 = 1/8(x - 1)

Answer:

0.15 km/min

Step-by-step explanation:

V=S/T

=50/360

≈0.15km/min

Answer:

x1 = 2 and x2 =7/2 or 3.5 yeah it says I need 20 word but I'm done so bye good luck!

Answer:

<

Step-by-step explanation:

Answer:

Ken class has a median of 84 while Judy class a median of 87

Step-by-step explanation:

Ken class has a median of 84 while Judy class a median of 87

Kens class has a mean score of 83, and Judy's class has a mean score of 86.43(rounded) so, judging by the mean, Judy's class is smarter. If we take a look at the median, (Ken: 84, and Judy: 87) then Judy's class is smarter. So, overall Judy's class is smarter than Ken's class.

welp i cant help but i can sing ;-;

Step-by-step explanation:

Answer:

8x^3 + 22x^2 - 4x

Answer:

B. 1/3

Step-by-step explanation:

15/45 = 1/3

Given:

The graph of a function.

To find:

The vertex form of the function.

Solution:

The graph is a U-shaped curve or a parabola with vertex at [tex](-3,-1)[/tex].

The parent function for vertical parabolas is [tex]f(x)=x^2[/tex] with vertex at (0,0).

It means the graph of [tex]f(x)=x^2[/tex]  translated 3 units left and 1 unit down the get the given graph.

The vertex form of a parabola is:

[tex]y=a(x-h)^2+k[/tex]

Where, a is a constant and (h,k) is vertex.

The vertex of the given parabola is at [tex](-3,-1)[/tex]. So, [tex]h=-3,k=-1.[/tex].

[tex]y=a(x-(-3))^2+(-1)[/tex]

[tex]y=a(x+3)^2-1[/tex]            ...(i)

The graph passes through point (-2,0). Putting [tex]x=-2,y=0[/tex], we get

[tex]0=a(-2+3)^2-1[/tex]

[tex]1=a(1)^2[/tex]

[tex]1=a[/tex]

Putting [tex]a=1[/tex] in (i).

[tex]y=1(x+3)^2-1[/tex]

[tex]y=(x+3)^2-1[/tex]

Therefore, the vertex form of the given graph is [tex]y=(x+3)^2-1[/tex].

Answer:

24cu. cm

Step-by-step explanation:

Answer:

1. B

2. D

3. A

4. C

if I'm not wrong

Answer:

j or h

Step-by-step explanation:

Answer:

396π.cm^3

Step-by-step explanation:

ere's your solution

=> height of cylinder = 11 cm

=> radius of cylinder = 6 cm

=> volume = πr^2h

=> putting the value of radius and height in formula

=>volume = 6^2*11 π

=> volume = 36*11 π

=> Volume = 396π .cm^3

Answer:

the answer is 130

Step-by-step explanation:

Answer:

130

Step-by-step explanation:

when adding you positive number to a negative number you have to subtract. so to make it easier im going to change it from -240 +370 to

370-240 and solve

370-240=130

have a great day :D

Answer:

Height = 8 units

Step-by-step explanation:

Area of a triangle = [tex]36\frac{4}{5}[/tex] square units

                             = [tex]\frac{184}{5}[/tex] square units

Height of the triangle = [tex]9\frac{1}{5}[/tex] units

                                    = [tex]\frac{46}{5}[/tex] units

Formula to calculate the area of a triangle is,

Area = [tex]\frac{1}{2}(\text{Base})(\text{Height})[/tex]

[tex]\frac{184}{5}= \frac{1}{2}\times (\frac{46}{5})\times (\text{Height})[/tex]

[tex]\frac{184}{5}= (\frac{46}{10})\times (\text{Height})[/tex]

Height = [tex]\frac{184}{5}\times \frac{10}{46}[/tex]

           = [tex]\frac{368}{46}[/tex]

           = 8 units

Therefore, height of the given triangle is 8 units.

Answer:

Its eight

Step-by-step explanation:

Since you need to do both steps just do them and then you can simplefiy

Answer:

75% off

Step-by-step explanation:

Answer:

multiply the first equation by -2, then add them

Step-by-step explanation:

7x+4y=-4         *-2 7x+4y=-4 *-2 = -14x-8y=8

5x+8y=28

-14x-8y=8                       x=-4, y=6

-9x=36

x=-4

7(-4)+4y=-4

-28+4y=-4

4y=24

y=6

Answer:

b= [tex]\frac{7}{5}[/tex] or b=1.4 or b=1 [tex]\frac{2}{5}[/tex]

Step-by-step explanation:

Probably wrong I literally just searched it up.

Answer:

No, also you can try  to use desmos to figure it out it is a very helpful tool

Step-by-step explanation:

Answer:

The 2 triangles on the right and left are isosceles, so they have 2 equal sides. Consequently, the angles at the base are equal.

Because the opposite angles of a vertix are equal, the triangle in the lower part has the angles x, 58° and 47°.

Because the sum of the inner angles of a triangle is 180, x= 180- (58+47)

x= 180-105 = 75°

Pls mark as brainliest

Answer: x = 72

Step-by-step explanation:

The triangle with ∠a is an isosceles triangle; the other two angles are congruent, let them be y

a + y + y = 180 (sum of angles in triangles)

58 + 2y = 180

Subtract 58 from both sides

2y = 122

Divide both sides by 2

y = 61°

In the triangle with ∠b, b is congruent to another angle, (isosceles triangle) let it be b.

b = 47°

y and b have a relationship with the other two of the angles with ∠x (vertical angles); let them be y and b.

y + b + x = 180

61 + 47 + x = 180

108 + x = 180

Subtract both sides by 108

x = 72

Answer:

A general exponential equation is written as:

y = a*(b)^x

Where:

y represents the amount of something as a function of the variable x, where x is an independent variable.

a is the initial amount, this is, the value of y when x = 0.

b is the rate of growth, this defines how much changes the value of y as x increases.