Mathematics High School

x + 2y = 10
-6x + 5y = -9
- what is the solution using substitution

Answers

Answer 1
X+2Y=10
X=10-2Y

-6X+5Y= -9
-6(10-2Y)+5Y= -9
-60+12Y+5Y= -9
17Y= -9+60
17Y=51
Y=3

X=10-2Y
X=10-2•3
X=10-6
X=4

Related Questions

please can you give the answer of this, 8x+5y=23 -8x+9y=-19

Answers

8X+5Y=23
8X=23-5Y

-8X+9Y= -19 multiple all by -1
8X-9Y=19
8x=23-5y
Plug that in
23-5Y-9Y=19
-14Y=19-23
-14Y= -4
Y=1

8X=23-5Y
8X=23-5•1
8X=23-5
8X=18
X=18/8
X=9/4

when a grizzly bear hibernates its heart rate drops to 10 beats per minute, which is 20% of its normal value.

question: what is a grizzly bear's normal heart rate when not hibernating?

__________ beats per minute.

Answers

Answer:

10 is 20% of 50.

50 beats per minute

There are 35 students in a classroom. The ratio of girls to boys is 2 to 3. How many boys and how many girls are there in the classroom?

A. 21 and 14
B. 14 and 21
C. 20 and 15
D. 15 and 20

Answers

Answer:

A. 21 (boys) and 14 (girls)

Step-by-step explanation:

2+3=5

35÷5= 7

7×3=21 boys

7×2=14 girls

simplify 2 to the power of 4 times 2 to the power of 6

Answers

Answer:

1/4

Step-by-step explanation:

=2^4×2^-6

=2^-2

=1/4

Answer:

you add the exponents so youd do 4+6 which is 10. and then 2 to the power of 10 is 1024

23
The Acme Company produces metal rods. The largest rod that the Acme company produces is 10 feet long and 2 feet in diameter. How much material (the volume) is required to produce 1 metal rod? Round to the nearest tenth.V

Answers

Step-by-step explanation:

i think it's mensuration qn isn't I'm anmol

anyone help pls!! will mark brainliest​

Answers

Answer:

2.5 cm is the radius

Step-by-step explanation:

A tunnel is in the shape of a parabola.if the tunnel is 40 feet wide and has a maximum height of 12 feet. write the equation of the quadratic function that represents the tunnel(let the axis of symmetry be the y-axis)​

Answers

9514 1404 393

Answer:

  y = -0.03x² +12

Step-by-step explanation:

For "tunnel" or "arch" or "bridge" problems, I like to start with the expression ...

  y = 1 - x²

It has a height of 1 and intersects the x-axis at ±1. This can be scaled to give the appropriate height and x-intercepts.

We want the x-intercepts to be ±20, so we can scale this horizontally by a factor of 20:

  y = 1 -(x/20)²

We want the height to be 12, so we can scale it vertically by a factor of 12:

  y = 12(1 -(x/20)²

  y = 12 -12(x²/400)

  y = -0.03x² +12

If A store had 100 toys 2398 x more how many is that

Answers

Answer:

Answer is 239,800.

ASAP ILL MARK BRAINLIEST!!!!!!

Answers

1280. 100% of students
X. 60% of student voting for Joan

X=1280•60/100
X=768

Julie weighs five watermelons and rounds the weighs to the nearest hundredth which of the weights round to 7.43 pounds

Answers

Options :

7.423 pounds

7.437 pounds

7.413 pounds

7.425 pounds

Answer:

7.425

Step-by-step explanation:

Rounding each option to the nearest hundredth:

The second digit after the decimal point is the hundredth digit, if the next digit (thousandth digit) is more than or equal to 5, then it is rounded to 1 and added to the hundredth digit value, if otherwise, it is rounded to zero.

7.423 = 7.42 (nearest hundredth)

7.437 = 7.44 (nearest hundredth)

7.413 = 7.41 (nearest hundredth)

7.425 = 7.43 (nearest hundredth)

Please help I’ll give you the Brainlylist

Answers

Answer:

86

Step-by-step explanation:

Answer:

28/15

--

I hope it helps!

PLEEASE HELP!!! The triangle shown below has an area of 20 units 2 squared.

Answers

X = 5 unitsDouble-check:8 x 5 = 4040 ÷ 2 = 20Please let me know if I am wrong.

find the lenght of cd

Answers

Use the distance formula.

[tex]\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

[tex]x_2=7\\x_1=3\\y_2=-8\\y_1=-2[/tex]

[tex]\sqrt{(7-3)^2+(-8-(-2))^2}[/tex]

=[tex]\sqrt{4^2+(-6)^2}[/tex]

=[tex]\sqrt{16+36}[/tex]

=[tex]\sqrt{52}[/tex]

≈7.2111...

So the answer is B! Hope this helped!

Find the volume: 5 cm cm 1ac 6.5cm
Pls help-?​

Answers

Answer:

390 cm

Step-by-step explanation:

How to find Volume

Width x Height x Length

=Volume

--

6.5 x 12 x 5 = 390

390 cm

--

SOMEONE HELPPPPPPPPPP!!!!!!!

Answers

Answer:

12

Step-by-step explanation: Hope it helps ;)

I need help and a explanation please

Answers

Answer:

$6.48

Step-by-step explanation:

It would be $6.48 because 1.60 times 4 1/2 is 7.2 and if you do 10% of 7.2 you get B.

ASAP EASY!!!!!!!!!!!

Answers

Answer:

I think 15%

Step-by-step explanation:

sorry if wrong Hope you do good !

                 -Ash

Answer:

102%

Step-by-step explanation:

Help- giving brainliest

Answers

Answer:

The relationship is *11

Step-by-step explanation:

any number times eleven will be a double of itself

for example:

2*11=22

5*11=55

4*11=44

and so on

Help!!!!!!fast!!!!noww!!!!!help!!!!

Answers

Answer:

q^12

Step-by-step explanation:

To solve, multiply the exponents

Help ASAP!!! Question in pic! Will give brainliest!

Answers

Answer:

It is 15.

Step-by-step explanation:

We know the common difference is 2 right?

7

9

11

13

15

Those are 5 times, so its 15.

(Can I get Brainliest)

Answer:

15

Step-by-step explanation:

because the common difference is 2, it would look like this: 7,9,11,13,15

What is the area of the figure she created?

Answers

Answer:

27 FT

Step-by-step explanation:

Area of square = L × W

= 4.5 ft × 4.5 ft

= 20.25 ft

Area of parallelogram = bh (base times height)

= 1.5 ft × 4.5 ft

= 6.75 ft

Total area = 20.25 ft + 6.75 ft

= 27 ft

HOPE THIS HELPED

yall the ones with boxes help

Answers

Answer:

16

Step-by-step explanation:

If the store sells 2 printers for every 5 computers

40/5 is 8. this means there are 8 sets of 5 computers

8x2 is 16 since for every 5computers, 2 printers are sold


What is the simplified form of the expression 0.3 (4x - 4y)?

Answers

Answer:

1.2x-1.2y

Step-by-step explanation:

Please help me!! Thanks

Answers

Answer:

A

Step-by-step explanation:

find the value of x
93
109
46

Answers

Answer:

109 °

Step-by-step explanation:

sjjssjhVYwvyJsjhajsjhhajajajsjsssjajssjssjsjsjsjsjajsj

akqnajjsjajqjajqjwjwwujwjsw akqnajjsjajqjajqjwjwwujwjsw

akkaskakk akqnajjsjajqjajqjwjwwujwjsw snsjjjaja la snsnjJaan

smsnsnsnsnskskksksakksksksksjsjsjsjsksksbnnjbnjjj

Answer:

i think it's 68 because all the angle have to add up to 180 degrees and if you add

68+93+109+46

you will get 180

Which expression represents the second partial sum for...?

Answers

Answer:

c

Step-by-step explanation:

just took the quiz

Answer:

C

Step-by-step explanation:

Edge2021

eric plotted the graph below to show the relationship between the temperature of his city and the number of cups of lemonade he sold daily: part a: describe the relationship between the temperature of the city and the number of cups of lemonade sold part b: describe how you can make the line of the best fit. write the approximate slope and y-intercept of the line of best fit. show your work, including the points that you use to calculate the slope and y-intercept.

Answers

Answer:

part A: the warmer the city temp was the more lemonade that was sold so a hotter day will sell more lemonade

part B: i used points 40,8 and 90,20 and got m= 25/6 then i did y=mx+b

90=25/6(1)+b

90/1=25/6+b

25/6   25/6

and then B= 21.6

Step-by-step explanation: im not sure if i did it right so i would check i havent done this since like the 6th grade like 4 years or so ago lol

round 58.9871 2 decimal place

Answers

Answer:

58.9871 rounded to the second decimal place is 58.98.

Step-by-step explanation:

Please help me out and make sure to show your work! Thanks.

Answers

Answer:

The width of the court is 30 feet.

Step-by-step explanation:

I_I = Court

Area= Length x Width

Area = 1,800 feet

Length = 60 feet

1,800 ÷ 60 = 30 feet

Hope this helped :D

I need help with this, if you can help I'd appreciate it ​

Answers

Answer:

3. x ≤ 6

4. x > 24

Step-by-step explanation:

3. x - 5 ≤ 1

   x - 5 + 5 ≤ 1 + 5

   x ≤ 6

4. you have to cross multiply on this one

x/8(8) > 3(8)

x > 24

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