Solve linear systems in 3 variables using elimination
x + y + 2z= -7
–5z = 25
3х - 3y -6z= 3

Answer:

insufficient infomation.

Answer:

y - 2 = -2(x - 1)

Step-by-step explanation:

Point slope form is

y - y₁ = m(x - x₁)

where x₁ and y₁ are a point on the line

We are given (x₁, y₁)  = (1, 2) and m = -2

plugging in

y - 2 = -2(x - 1)

Answer:

Step-by-step explanation:

An = 7 + (41-1)8 = 327

Answer:

327.

Step-by-step explanation:

T41 = a + (n-1) d.

T41 = 7 + ( 41 - 1) 8.

T41 = 7 + ( 40) 8.

T41 = 7 + 320.

T41 = 327.

Answer: x = 45

Step-by-step explanation:

Given information

Tina's age (now) = 15 years old

Carl's age (now) = x years old

Ratio of age (3 years ago) = Tina : Carl = 2 : 7

Set equation according to the given information

(15 - 3) / (x - 3) = 2 / 7

Cross multiply

7 (15 - 3) = 2 (x - 3)

Simplify by subtraction in the parentheses

7 (12) = 2 (x - 3)

Simplify by multiplication

84 = 2 (x - 3)

Divide 2 on both sides

84 / 2 = 2 (x - 3) / 2

42 = x - 3

Add 3 on both sides

42 + 3 = x - 3 + 3

[tex]\boxed{x=45}[/tex]

Hope this helps!! :)

Please let me know if you have any questions

Answer:

x = 45

Step-by-step explanation:

Let the present age of Carl be x.

Given Tina's present age is 15 and 3 years ago, the ratio of Tina's and Carl's ages was 2:7

Then 3 years ago, Tina's age will be

[tex] \\ 15 - 3 = 12 \: years[/tex]

and, Carl's age will be x - 3

and they are in the ratio 2:7.

therefore,

[tex] \\ \: \: \: \: \: \: \: \: 12 \ratio(x - 3) = 2 \ratio7[/tex]

[tex] \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \frac{12}{x - 3} = \frac{2}{7} [/tex]

[tex] \\ \sf \: by \: cross \: multiplication[/tex]

[tex] \\ \: \: \: \: \: \: 12 \times 7 = 2(x - 3) [/tex]

[tex] \\ \: \: \: \: \: \: x - 3 = \frac{84}{2} = 42[/tex]

[tex] \\ \: \: \: \: \: \: \: \: \: \: \: \: x = 42 + 3[/tex]

[tex] \\ \: \: \: \: \: \: \: \: \: \: \: \: \therefore \: \: x = 45[/tex]

Answer:

slope:-1/2 y-intercept:3

Step-by-step explanation:

Answer: slope: -1/2

y-intercept: 3

Step-by-step explanation:

the line intercepts the y-axis at 3

Answer:

The graph of a quadratic function is a U-shaped curve called a parabola. ... The extreme point ( maximum or minimum ) of a parabola is called the vertex, and the axis of symmetry is a vertical line that passes through the vertex. The x-intercepts are the points at which the parabola crosses the x-axis.

Answer:

64 fluid ounces

Step-by-step explanation:

10*8*0.5/20=10*8*1/20=8

8 cups

convert to ounces

8*8=64

Answer:

The answer is 12

Step-by-step explanation:

Answer:

Option D) d (t ) = -0.25t + 2

Step-by-step explanation:

Given the water level covering a road after a rainstorm of 2 meters, for which the water level recedes at a rate of 0.25 meters per hour:

We can express the depth, d, of the water as a linear function of the time, t, in hours elapsed from the end of the rainstorm as:

d (t ) = -0.25t + 2

The receding rate has a negative value since it represents how the water level decreases over time.

Therefore, the correct answer is Option D: d (t ) = -0.25t + 2

Answer: 7/20

hope this helps XD

Answer:

until 64 miles company A will charge less than company B, they will charge the same price at 65 miles then company B will charge more.

explanation:

94 = 55 + 0.6m

m = (94-55) / 0.6 = 65

The Company A charge less than Company B when the mileage will be more than 65 .

An equation is a mathematical statement that is made up of two expressions connected by an equal sign. For example, 3x – 5 = 16 is an equation.  

According to the question

Jenny is going to rent a truck for one day.  

Company A :

Charges $94 and allows unlimited mileage.

i.e

Rent of truck for one day = $94

Company B :

Has an initial fee of $55 and charges an additional $0.60 for every mile driven.

Let mile be m

i.e

Rent of truck for one day = $55 +  $0.60m

Now, Company A charge less than Company B for mileages

For that we will first find equal point by making both Company's rent equal

Company's A Rent of truck for one day = Company's B Rent of truck for one day

The equation will be :

[tex]94 = 55 + 0.60m[/tex]  

[tex]39 = 0.6m[/tex]

m = 65

So, at 65 miles both company will rent same but after 65 miles Company B will charge more than Company A .

Hence, The Company A charge less than Company B when the mileage will be more than 65 .

To know more about equation here:

https://brainly.com/question/10413253

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Answer:

-6/-11

Step-by-step explanation:

First we find the gradient.

Which is defined by the formula, y2-y1/x2-x1

In the coordinates given, y2= -1   y1= 5      x2= -4     x1=7

-1-5/-4-7 = -6.75 (this is the slope / gradient)

Therefore it is -6/-11

Answer:

Answer:

9x+80

hopes this helps :)

Answer:

9x+80

Step-by-step explanation:

The expression is equals 2x+7x+10+70.

1) 2x+7x=9x

2) 10+70=80

3) Then just it makes 9x+80

Answer:

65years a that’s it uiiijya

Step-by-step explanation:

hope this helps

plz mark as brainliest

had this answer got it right off edge

Answer:

$40

Step-by-step explanation:

If the perimeter of the larger farm is 80 yards in a 8:5 ratio, the perimeter of the smaller farm will be 50 yards.

Multiply this value by the cost of 0.50 per yard to get $40.

What’s the Problem/question ?

Answer:

15N+15J+60

Step-by-step explanation:

We know that Noah and James each receive $15 per hour. That means that to get the money one of them earned in a week, we multiply the money they earn ($15) by the hours they worked (N or J):

15 × N is what Noah earned.

15 × J is what James earned.

Combining those are just 15N + 15J. Then, we add the bonus Noah received ($60) to get their total combined earnings:

15N+15J+60

Answer:

15N+15J+60

Step-by-step explanation:

Answer:

V = 268 cubic inches

Step-by-step explanation:

[tex]V = \frac{4}{3} \pi r^{3}[/tex]

[tex]V = \frac{4}{3} \pi (4^{3} )[/tex]

[tex]V =\frac{4}{3}\pi (64)[/tex]

V = 268.0825731

V = 268

The volume of the sphere with radius 4 inches is V = 268.08 inches³

A sphere is symmetrical, round in shape. It is a three dimensional solid, that has all its surface points at equal distances from the center. It has surface area and volume based on its radius. It does not have any faces, corners or edges.

The Surface Area of a Sphere = 4πr²

The Volume of a Sphere = ( 4/3 ) πr³

where r is the radius of the sphere

Given data ,

Let the radius of the sphere be r = 4 inches

Let the volume of the sphere be V

So , Volume of a Sphere = ( 4/3 ) πr³

Substituting the given value of the radius, r = 4 in, we get:

V = (4/3)π(4³)

V = (4/3)π(64)

V = 268.08 inches³

Hence , the equation that finds the volume of the sphere is

V = (4/3)πr³ = (4/3)π(4³) = 268.08 inches³

To learn more about sphere click :

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Answer:

14. -x-y=-3

    2x-y=6

=> x=3, y=0

Step-by-step explanation:

The answer to your question is 164 !!!

Answer:

I can even see anything can you reupload your answer, please?

Step-by-step explanation:

Answer:

34ft

Step-by-step explanation:

Line OQ is 46ft which is half of line SR which was 92ft. This means that half of line SP is the same as line QP or g: 68 ÷ 2 = 34. Therefore, g = 34ft

Hope this helps!

-2/5x - 9 < 9/10

-2/5x-9+9<9/10+9

-2/5x<99/10

(5/-2)*(-2/5 x)<(5/-2)*(99/10)

x>-99/4

Answer:

D. 1/2 ≈ 0.083

Step-by-step explanation:

So for the coin there is a 1/2 chance because there are two sides, and only one will be "right." For the side-sided dice, there is a 1/6 chance using the same thinking as the coin.

We can multiply them by each other,

1/2 * 1/6 = 1/12

So the correct answer is D. 1/2 *about* 0.083

I hope this helps, have a nice day! :D

Answer:

9 1/12

Find LCM for denominators

then add

boom!

9 1/12

Have a nice day!

Please give brainliest :D

Answer:

9 1/12

or

109/12

Step-by-step explanation:

Hope this helps!

Answer:

At the end of 4 years, your savings will have grown to $6,077.

Step-by-step explanation:

Answer:

HCF of 12, 24 and 36 by Euclidean Algorithm

As per the Euclidean Algorithm, HCF(X, Y) = HCF(Y, X mod Y)

where X > Y and mod is the modulo operator.

HCF(12, 24, 36) = HCF(HCF(12, 24), 36)

Steps for HCF(12, 24):

HCF(24, 12) = HCF(12, 24 mod 12) = HCF(12, 0)

HCF(12, 0) = 12 (∵ HCF(X, 0) = |X|, where X ≠ 0)

⇒ HCF(12, 24) = 12

⇒ HCF(HCF(12, 24), 36) = HCF(12, 36)

Steps for HCF(12, 36):

HCF(36, 12) = HCF(12, 36 mod 12) = HCF(12, 0)

HCF(12, 0) = 12 (∵ HCF(X, 0) = |X|, where X ≠ 0)

⇒ HCF(12, 36) = 12

Therefore, the value of HCF of 12, 24, and 36 is 12.

Step-by-step explanation:

factors of 12=1,2,3,4,6,12

factors of 24=1,2,3,4,6,8,12,24

factors of 36=1,2,3,4,6,9,12,18,36

common factors =1,2,3,4,6,12

Therefore factors of 12,24,36=12

Answer:

D. 918-y=3 Because y is equal to 915 for all values of x