Mathematics High School

Solve the system using substitution

3x - 6y =30
y = -6x + 34

Answers

Answer 1

x = 6

y = -2

(explanation in image)

Solve The System Using Substitution3x - 6y =30y = -6x + 34
Answer 2

Answer:

3x - 6(- 6x + 34) = 30 3x + 36x - 204 = 30 40x - 204 = 30 40x = 234x = 5.85

then solve for y as a linear equation

Step-by-step explanation:

Have a nice day !!!! :)

Related Questions

help!!!!!!!! pls!!!!!

Answers

5;7
10;14
Basketball and friends

In the figure shown below all angles are right angles are right angles and the side lengths given are in yards what is the area in square yards of the figure? Please explain to me im confuse I got 134 and it's wrong

Answers

Answer:

98

Step-by-step explanation:

4 * 2 = 8

9 *  10 =  90

90 + 8 = 98

Graph the line that passes through the points (0,-5) and (-5,_6)

Answers

Answer:

Step-by-step explanation:

First find the slope(m) between (0,-5) and (-5,-6)

m = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex] = [tex]\frac{-6-(-5)}{-5-0}[/tex] = [tex]\frac{-1}{-5}[/tex] =    [tex]\frac{1}{5}[/tex]

y = [tex]\frac{1}{5}[/tex]x -5

I attached the graph. I used desmos.

Hope that helps!

2 people share 3 chocolate bars equally. Each chocolate bar is the same size.
About how much chocolate does each person get?

Answers

Answer:

1.5 Pieces

Step-by-step explanation:

If you divide 3 chocolate bars by 2 people it will evenly be distributed by 1.5

Answer:

Just divide it.

Step-by-step explanation:

Take each bar height as 10. There are 3 bars. So the total height is 30. But there is 2 persons, so dividing it will result 15. So according to this assumed answer, I will say you will have to do this :

Give one bar to each of them and the bar should be divided in half, provided that  two parts should be there as well as both parts of it should be 5 in height.

So, the upper part was an assume. This time, you mentioned no heights, so I will do it with equation process.

(meaning of each variable)

people = x

chocolate bar = 3

2x ( since 2 people) = 3 ( three chocolate bars )

2x=3

x=3/2

x=1.5 ( one and half )

I hope you understand.

Need the answer pls help

Answers

Answer:

A = (-4, -6)

B = (-2, -2)

C = (-6, -4)

Simplify to a single power of 4:

Answers

Answer:

[tex]4^8[/tex]

Step-by-step explanation:

Formula: [tex](a^b)^c = a^{bc}[/tex]

Solve:

[tex](4^2)^4[/tex][tex]4^{2*4}[/tex][tex]4^8[/tex]

-Chetan K

pls explain this to me I don't get it​

Answers

Answer:

u divide all numbers by 1000

Step-by-step explanation:

help! needed urgently, thanks

Answers

We know that there are 99 students in total. He already entered the marks of 9/11 of the students. We need to find out how many students’ marks have not been entered yet.

We can multiply 99 by 9/11. This gives us 81. We now need to subtract 99 from 81. This gives us 18.

He has not entered the marks of 18 students.

Please someone please help me.

Answers

Answer: B

Step-by-step explanation:

Help me to answer this pls ​

Answers


To convert celsius to Fahrenheit:
=》(0°C × 9/5) + 32 = 32°F

To convert Fahrenheit to celsius:
=》(32°F − 32) × 5/9 = 0°C

To convert kelvin to celsius:
=》 C = K - 273.15.

To convert Fahrenheit to kelvin :
=》°F = (K − 273.15) × 9/5 + 32.

Using these formulas,

1) 38°C
= (38°C × 9/5) + 32
= 100.4°F

2) 313 K
= 313K − 273.15
= 39.85°C

3) 85°F - 69°F
= 16° F ------> difference
In celsius :
= (16°F − 32) × 5/9 =
-8.889°C

4) At 3 p.m = 13°F
If temperature increases by 2°F,
At 5 p.m =》
13 + 4
= 17°F

5) 55°F - 5
= 50°F
In kelvin :
(50°F − 32) × 5/9 + 273.15
= 283.15K


Hope it helps ⚜

The sales tax for an item was $26.60 and it cost $380 before tax. Find the sales tax rate. Write your answer as a percentage.

Answers

Answer:

7% sales tax

Step-by-step explanation:

Given the following question:
Sales tax = $26.60
It costs $380 before tax

In order to find the answer, we simply find a random percentage of the original cost before tax.

[tex]\frac{7\times380}{100} =2660\div100=26.6=26.60[/tex]
7% sales tax rate.

Hope this helps.

PLEASE I NEED HELPPPP

Answers

Answer:

A) (0,6)

Step-by-step explanation:

the y-intercept, if the equation is written in slope-intercept form (y=mx+b) is represented by the 'b' and will be written as an ordered pair with an x-value of zero

Carol is baking chocolate biscuits. The recipe she is following uses 150 g of
sugar and makes 50 biscuits.
If Carol only has 30 g of sugar then how many of these biscuits can she
make?

Answers

She can make 10 biscuits out of 30g of sugar.

Is 1.24 a rational number?

Answers

Answer:

YES

Step-by-step explanation:

100 POINTS! Fully correct and explanatory answers only!

In the figure, ∠4 is an exterior angle to triangle ∠A∠U∠L .


(a) What is the angle measurement of Angle 3? Explain the angle relationship you used.



(b) What is the angle measurement of Angle 4? Explain the angle relationship you used.



(c) What is the angle relationship between angles 1, 2, & 3? What do you notice that is similar and different between the angle relationship between angles 1, 2, & 3 and that between 3 & 4?



(d) The combination of which two angles in the triangle equal angle 4? Use your work from Part C to figure out why this is the case, and explain your conclusion.


ANSWER ALL 4 PARTS FULLY AND EXPLANITORY!

Answers

#1

<3 be x

Apply angle sum property

[tex]\\ \rm\Rrightarrow x+25+52=180[/tex]

[tex]\\ \rm\Rrightarrow x+77=180[/tex]

[tex]\\ \rm\Rrightarrow x=103[/tex]

#2

Sum of two Interiors=exterior

<4=25+52=77°

#3

Yes <1 ,<2,<3 have sum 180°.

#4

<2 and <1.

As sum of two Interiors=exterior

20) A school orders 26 packs of pencils. Each pack contains 12 boxes of 12 pencils. The
pencils are to be shared equally among the 14 classes in the school. To the nearest whole
number, how many pencils will each class be given?

Answers

Answer:

266

Step-by-step explanation:

26*12*12/14

sounds

what is the sum of the measures of the exterior angles of a decagon?

Answers

Answer:

360°

Step-by-step explanation:

The sum of the exterior angles of any polygon is 360°

sum of exterior angles of decagon = 360°

0.25(2/3y-5+1/3y-7-9y)=0.25

Answers

y = -1.625 sorry if its incorrect, hope it helps tho!

Find the missing length of the figure. help yall please give me the steps on doing it I'm confused

Answers

I think it is 6.5 because the bottom sides of the two triangles are congruent; and if they are both congruent and the triangles meet up at the same points, then x must equal 6.5 as well

Test Direction: Find the measure of <s. Write the answer on the space provided. ​

Answers

Answer:

16. 40°

17. 40°

18. 50°

19. 45°

20. 135°

Step-by-step explanation:

16. angles opposite to each other are equal

17. 180 - 140 = 40

18. 90 - 40 = 50

19. 65 + 70 = 135

180 - 135 = 45

20. 145 + 80 = 225

360 - 225 = 135

hope this helps :)

1/2+2/3 PLEASE HELP AND DONT DO IT LIKE 1.083333333 MY TEACHER DOESNT ALLOW THAT PLEASE HELP ME

Answers

Answer:

7/6 or 1 1/6

Step-by-step explanation:

when you add or subtract fractions, you have to have a common denominator. in this case, your common denominator is 6

1/2=3/6

2/3=4/6

add the numerators and keep the denominator 6

4+3=7

7/6 or 1 1/6

The parking garage at the airport has 4750 empty parking spaces and 250 full parking spaces. What percent of the spaces in the garage are empty write your answer using a %

Answers

Answer:

I'd say around 95% or 94.737%

Step-by-step explanation:

4750 - 250 = 4500

4750/250 = 1/19

1/19 = 0.052 or close to 5%

4750 x 94.737% = 4500.0075

I hope this helps!

Can anyone please help me with this? I need help really soon!

Answers

Answer:

(x,y)=(19/5,-6/5) I'm not sure it's right, but hopefully it is

Help me pleaseeee! I beg u

Answers

Answer:

look at the pictures

Step-by-step explanation:

Robyn saves $204 and spends $32.50 on books. She wants to purchase more books from a sale where they cost $8.15 each.

Which answer gives the best estimate for the number of books Robyn can buy?

Answers

Answer: umm I think the best estimate would be$37.38

Step-by-step explanation:

i) How do you find the sum of the angle measures of any convex polygon?

ii) If the polygon is regular, how do you find the measure of each interior angle in the polygon?

iii) How do you find the sum of the exterior angle measures of any convex polygon?

iv) If the polygon is regular, how do you find the measure of each exterior angle in the polygon?

Answers

Answer:

1) The sum of interior angles of a convex polygon is equal to (n-2) × 180°, where 'n' is the number of sides of the polygon.

2) A regular polygon is a flat shape whose sides are all equal and whose angles are all equal. The formula for finding the sum of the measure of the interior angles is (n - 2) * 180. To find the measure of one interior angle, we take that formula and divide by the number of sides n: (n - 2) * 180 / n.

4) Irrespective of the number of sides of a regular polygon, the measure of each exterior angle is equal and the sum of the measure of all the exterior angles of the regular polygon is equal to 360°.

Step-by-step explanation:

I hope this helps!!

Write the equation of the line in slope-intercept form.


the question is 80y and 8x

The equation of the line in slope-intercept form is

Answers

Answer:

Y =mx/10+c/80

Point(8x, 80y) lies on Y =mx +c

Calculate the equation of the following line.

Answers

Answer:

point-slope form: [tex]y+1=\frac{-3}{2}(x-3)[/tex]

slope-intercept form: [tex]y=\frac{-3}{2} x+\frac{7}{2}[/tex]

Step-by-step explanation:

find the slope of the line using two points on the graph, and then you can get your equation in point-slope form. if you need it in slope-intercept form, you can re-arrange your point-slope form equation.

hope this helps :)

If f(x) is a polynomial of degree 4, and g(x) is a polynomial of degree 2, then what is the degree of polynomial f(x) - g(x)?

Answers

Answer:

4

Step-by-step explanation:

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help me with geometry please

Answers

Answer:

44

Step-by-step explanation:

angle a is congruent with d so they have the same angle

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