Mathematics College

Solve for x and y:
Ty– 5x = 45
x = 8 - 2y
O x = 5, y = 10
O x = 5, y = -2
x = -2, y = 5
O x = 4, y = 2

Answers

Answer 1

Answer:

x = -2

y = 5

Step-by-step explanation:

7y - 5x = 45    -------------------(I)

x = 8 - 2y -----------------------(II)

Substitute x = 8 - 2y in equation (II)

7y - 5(8-2y) = 45

7y + 8 *(-5) - 2y*(-5) = 45

7y - 40 + 10y = 45

17y - 40 = 45

17y = 45 + 40

17y = 85

y = 85/17

y = 5

Plugin y = 5 in equation (II)

x = 8 - 2*5

x = 8 - 10

x = -2

Related Questions

find length of side (x)

Answers

Answer:

choice D) x = 6.6

Step-by-step explanation:

sin 27° = 3/x

0.4540 = 3/x

x = 6.6

5x(30 divided by 6)2

Answers

Answer:

50

Step-by-step explanation:

Once the boat is 2,500 feet away from the port, it is no longer your responsibility to track it. Will the boat be 2,500 feet away after two minutes?

Answers

Answer:

Step-by-step explanation:no

What is the speed of the boat?

solve the inequality 3(y+5)>21

Answers

Answer:

y > 2

Step-by-step explanation:

1) [tex]3(y+5)>21[/tex]

Divide both sides by 3.

2) [tex]y+5>7[/tex]

Move the constant to the right side and change it's sign.

3) [tex]y>7-5[/tex]

Subtract the numbers.

4) [tex]y>2[/tex]


PLEASE HELP !! ILL GIVE BRAINLIEST !!

Answers

Answer:

<YXZ and <TUS

Step-by-step explanation:

Alternate exterior angles are angles that are found on opposite sides of a transversal and are found just outside each parallel line that the transversal crosses.

Looking at the diagram given and considering the options available, the angles that are alternate exterior angles are:

<YXZ and <TUS

Stephen opens a savings account with an initial deposit of $300.
Every month, Stephen will deposit an additional $250 into the
account from his paycheck. Which function below shows the total
amount of his deposits for x number of months?
A. y = 300x + 250
B. y = 12x + 550
C. y = x(300 + 250)
D. y = 250x + 300

Answers

D. Y=250x+300
For example let’s say Stephen has been doing this for 5 months
It would be 250(5)+ 300

Please help asap i’ll give brainly it's due in 30 min

Answers

Answer:

[tex]2\sqrt{3[/tex]

Step-by-step explanation:

What is the gradient?

Answers

Answer:

Gradient = 2

Step-by-step explanation:

Gradient of a line = Slope of the line

Since, slope of a line passing through two points [tex](x_1, y_1)[/tex] and [tex](x_2,y_2)[/tex] is given by,

Slope = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]

Given line in the graph passes through two points (1, 0) and (2, 2)

Therefore, slope or gradient of the line = [tex]\frac{2-0}{2-1}[/tex]

                                                                  = 2

Gradient = 2 will be the answer.

WHATS X AND WHY URGENT !!!!!!

4x + 7.8y = 7.85
- 8x - y = -4.75

Answers

Answer:

X=.5, y=.75

Step-by-step explanation:

Answer:

x=0.5, y=0.75

Step-by-step explanation:

Method : Substitution Method

[tex]\begin{bmatrix}4x+7.8y=7.85\\ -8x-y=-4.75\end{bmatrix}\\\\[/tex]

Isolate in for 4x +7.8y=7.85 and solve

[tex]4x+7.8y=7.85\\\mathrm{Multiply\:both\:sides\:by\:}100\\\\4x\times\:100+7.8y\times\:100=7.85\times\:100\\\\Refine\\400x+780y=785\\\\\mathrm{Subtract\:}780y\mathrm{\:from\:both\:sides}\\400x+780y-780y=785-780y\\\\Simplify\\400x=785-780y\\\\\mathrm{Divide\:both\:sides\:by\:}400\\\frac{400x}{400}=\frac{785}{400}-\frac{780y}{400}\\\\Simplify\\x =\frac{157-156y}{80}\\\\\mathrm{Substitute\:}x=\frac{157-156y}{80}\\\\\begin{bmatrix}-8\times\frac{157-156y}{80}-y=-4.75\end{bmatrix}[/tex]

[tex]Simplify\\\\\begin{bmatrix}\frac{-157+146y}{10}=-4.75\end{bmatrix}\\\\Isolate\:y \:for \:\frac{-157+146y}{10}=-4.75\\\\\mathrm{Multiply\:both\:sides\:by\:}10\\\frac{10\left(-157+146y\right)}{10}=10\left(-4.75\right)\\\\-157+146y=-47.5\\\\-157+146y+157=-47.5+157\\\\Simplify\\146y=109.5\\\\\mathrm{Divide\:both\:sides\:by\:}146\\\frac{146y}{146}=\frac{109.5}{146}\\\\Simplify\\y=0.75\\\\\mathrm{For\:}x=\frac{157-156y}{80}\\\\\mathrm{Substitute\:}y=0.75\\\\x=\frac{157-156\times\:0.75}{80}\\\\x=0.5,\:y=0.75[/tex]

5. Find the surface area of the prism.
13 cm
5 cm
4 cm
12 cm

Answers

Answer:

162 sq. cm

Step-by-step explanation:

ph+ 2b

13 + 5 + 13 + 5 * 4 + 2 * 12

36 * 4 + 24

144 +24

168

ASAP Point A, located at (-3, -3) is translated 6 units up, resulting in the location of point A'. What other transformation would result in the same location for point A'? A reflection in the x-axis A translation of 6 units to the left A reflection in the y-axis A rotation of 180°

~I KNOW ITS NOT A REFLECTION IN THE Y-AXIS

Answers

Answer:

(3,3)

Step-by-step explanation:

A reflection of this across the y-axis is (-3,3). A reflection of Point A, (-3,-3), over the x-axis is also (-3,3).

A triangle has vertices T(-2,4), E(6,2), and D(1,-1). Is ATED a right triangle?
No, this is not a right triangle.
Yes, because ED is perpendicular to DT which makes a right angle.
Yes, because TE is perpendicular to DT which makes a right angle.
Yes, because TE is perpendicular to ED which makes a right angle.

Answers

Answer:

B. Yes, because ED is perpendicular to DT which makes a right angle.

Step-by-step explanation:

Plot the given points and connect in pairs to get a triangle.

Visually we can say it is a right triangle as legs TD and ED seem perpendicular.

Let's confirm this by finding the slopes.

Slope of TD:

m = (-1 - 4)/(1 -(-2)) = -5/3

Slope of ED:

(-1 - 2)/ (1 - 6) = -3/-5 = 3/5

Product of the slopes is:

-5/3*3/5 = -1

This confirms DT⊥ED

Correct choice is B

Lines a and b are parallel and lines e and f are parallel. Vertical and parallel lines a and b are intersected by horizontal lines e and f. At the intersection of lines a and e, the top left angle is angle 1 and the top right angle is angle 2. At the intersection of lines b and e, the bottom left angle is angle 3. At the intersection of lines b and f, the uppercase right angle is angle 4 and the bottom left angle is angle 5. If m1 = 89°, what is m5? 1 89 91 179

Answers

Answer:

answer is c

Step-by-step explanation:

angle m5 is 91

angle 1 = 89

angle 5= x

180=89-x

180=89+91

Answer:

c (91)

Step-by-step explanation:

trust me

How many pieces are there on the rubix cube

Answers

27 can I get brain lest thanks man if you do



thanks

26 pieces

There are 26 pieces in total, and the cube has 8 corners and 6 centers.

HELP WILL GIVE BRANLIEST!

No links!!

Answers

Answer:

32 ftEach base floor tile is 5ft and there's 4 tiles so 5x4=20

Next,there are 4 walls each wall is 3ft 3x4=12

Now you add your answers which is 20+12=32

Hope that helps

Plss help mart brain list

Answers

The answer is x=14. Just lmk if you need the work too

Answer:

X=14

Step-by-step explanation:

Hope this helps , good luck ^^

PLEASE HELP!!!! THERE IS A PICTURE SUBMITTED!

Answers

Answer:

C: 4 hours

Step-by-step explanation:

Mean = Σxn/n

Σx/n = ((2 × 4) + (3 × 5) + (4 × 6) + (5 × 3) + (6 × 3) + (7 × 0) + (8 × 1))/(4 + 5 + 6 + 3 + 3 + 0 + 1)

Σx/n = 88/22

Σx/n = 4 hours

Help due tonight.. *no links please*

Answers

Answer:

measure of angle 3= 109

angle 2=71

angle 1=109

Step-by-step explanation:

a straight line =180

Using the rule y= 3x + 4, find the value of y when xis 2.
OS
A)
9
B)
10
11
D
12
Help I need this fast

Answers

Step-by-step explanation:

given

[tex]y = 3x + 4[/tex]

[tex]y(2) = 3(2) + 4 \\ = 6 + 4 = 10[/tex]

Answer:

B) 10

Step-by-step explanation:

y=3x+4

y=3(2)+4

y=6+4

y=10

Hope this helps!

4. What number comes next. Whats my rule?
34,41,. 55,63,
Whats my rule?
(2 Points)
Enter your answer

Answers

48 then 70. Your rule is add 7.

answer choices:
A. 42 °
B. 47°
C. 48°
D. 41°
can some one help me please

Answers

Answer:

D. 41°

Step-by-step explanation:

[tex](3x + 9) \degree = 132 \degree \\ (vertical \: \angle s) \\ 3x + 9 = 132 \\ 3x = 132 - 9 \\ 3x = 123 \\ x = \frac{123}{3} \\ x = 41 \\ \\ \because m\angle QRS =x\degree \\\therefore m\angle QRS = 41\degree [/tex]

D.41....I think QRS is a right triangle but I can’t see that well. If it’s a right triangle that leaves a 30,60,90 approach.

This is relative frequency table. Can someone help?

Answers

59 is the answer to this question

Answer:

Step-by-step explanation:

59 kids are playing video games.. we are maybe missing some of the instructions?  or are there not any more?  

Can somone Provide some assistance?​

Answers

THANKS

HAHHAHAHAHAHAHAHAHAHAHAHAHAHA

What is the volume of the cone?
Use 3.14 for π, and round to the nearest tenth.

Answers

Volume =  

1  πr2h

3

=  

1 ×π×22×7

3

=  29.321531433505 miles3

If f(x) = 2x - 3 and g(x) = 3x - 2 what is fg ?

Answers

Answer:

18 - 13x

Step-by-step explanation:

f g . 6 x 2 − 13 x + 6

What is the product?
5
-2.
-6
2
-7
8
-5
2.
6.
-2
-3
A
4 -3
-7
1
Mark this and retum

Answers

Step-by-step explanation:

correct answer is

[tex] \binom{ - 5 \: 2}{6 \: - 2} [/tex]

Question 11(Multiple Choice Worth 1 points)

(08.06 MC)

The following data shows the weight, in pounds, of 5 boxes:

3, 1, 2, 2, 2

What is the value of the mean absolute deviation of the weight of the boxes, and what does it represent about the weight of a box?

(A.) 0.4 pound; on average, the weight of a box varies 0.4 pounds from the mean of 2 pounds

(B.) 0.8 pound; on average, the weight of a box varies 0.8 pounds from the mean of 2 pounds

(C.) 0.4 pound; the weight of 50% of the boxes is greater than 0.4 pound

(D.) 0.8 pound; the weight of 50% of the boxes is greater than 0.8 pound

Answers

Answer:

c is the answer

Step-by-step explanation:

Answer:

Step-by-step explanation:

First put the numbers from least to greatest: 1, 2, 2, 2, 3       2 is the mean.

Then you determine the distance each data value is from the mean.

1, 2, 2, 2, 3

1, 0, 0, 0, 1

Calculate the mean of the distances:  1 + 0 + 0 + 0 + 1 = 2

Then divide:  2 divided by 5 = 0.4

So your answer is 0.4 pound; on average, the weight of a box varies 0.4 pounds from the mean of 2 pounds

HELP SOMEONE PLZ HELP IM STRUGGLING PLZZ I NEED HELP I WILL MARK BRAINLEST​

Answers

Answer:

Without any background information on the text such as what the physical environment is and what the economic activities are. I can't really help you.

Are the cylinders similar? Why or why not?​

Answers

Answer: are cylinders similar to what its not asking so id.kkk

Step-by-step explanation:

Solve using the tangent formula(real answers only please)

Answers

9514 1404 393

Answer:

  21.07

Step-by-step explanation:

The tangent ratio is ...

  Tan = Opposite/Adjacent

For the given values, this is ...

  tan(36°) = x/29

Solving for x, we have ...

  x = 29·tan(36°)

  x ≈ 21.07

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