1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
harina [27]
2 years ago
14

3x -4y= -20 -x +2y =10 whats the value of y

Mathematics
1 answer:
Anni [7]2 years ago
4 0
3x-4y=10
-20-x+2y=10 then -30+2y=x now plug this in the other equation:
3(-30+2y)-4y=10
-90+6y-4y=10
2y=100
y=50
You might be interested in
PLEASE HELP The volume of a cube is defined by the function, V(x), where the volume is measured in cubic meters. Find a polynomi
olya-2409 [2.1K]

we have

V(x)=x^3-12x^2+48x-64

we know that

The volume of a cube is equal to

V=b^{3}

where

b is the length side of a cube

Using a graph tool------> find the roots of the polynomial

see the attached figure

x=4

so

x^3-12x^2+48x-64=(x-4)^{3}

therefore

<u>The answer is</u>

the length side of a cube is equal to (x-4)

5 0
3 years ago
21 ten thousands + 18 ones + 60 hundreds
Vinvika [58]
21,618.........................
3 0
3 years ago
Read 2 more answers
5x(2x-y) -3y(2+3x) expand and simplify​
OleMash [197]

Answer:

10x² - 14xy -6y

Step-by-step explanation:

5x(2x-y)-3y(2+3x)

10x²-5xy-6y-9xy

10x² - 14xy - 6y

5 0
3 years ago
Marylou is blowing up a beach ball. The package says that the ball has a diameter of 12 inches. What is the volume of the beach
Pavlova-9 [17]

Answer:

Volume of a circle = approximatley 25.12

Step-by-step explanation:

1. Volume of a circle= 4/3*pi*radius

2. Radius equals 1/2 of diameter

3. 12/2=6

4. radius=6

5. 4/3*3.14*6=25.12

6. Volume of a circle = approximatley 25.12

5 0
3 years ago
A box has a volume of 22 1/2 in³. Find the length of the box!
aliya0001 [1]

Answer:

Length = 2.823 in (to 3 decimal places)  

Step-by-step explanation:

assuming that the box is a cubic box:

volume of box = 22\frac{1}{2} in³ = 22.5 in³

volume = Length × Length × Length = (Length)³

∴ (Length)³ = 22.5

∴ Length = ∛(22.5)

using the calculator punch ∛(22.5), and the answer is:

∴ Length = 2.823 in (to 3 decimal places)

3 0
3 years ago
Other questions:
  • Alejandra plans to sew fringe on a scarf. The scarf is shaped rectangle. The length of the scarf is 48 inches. The width is one
    14·1 answer
  • Point F is on circle C. What is the length of line segment GF?
    5·2 answers
  • Your company is hosting a benefit 5 kilometer race.
    6·2 answers
  • SOLVE. integration of (1-v) /(1+v^2)
    15·2 answers
  • Someone plz help me no one helping me plz don’t answer saying idk or oh it so easy or something unhelpful cuz if it was easy HEL
    8·1 answer
  • Which of the following is the measure of PCR?
    11·1 answer
  • Suppose a pack of candy bars has 6 bars. Each bar weighs 3.96 ounces. How much does the pack weigh?
    10·1 answer
  • I KEEP MESSING UP HOLD ON-
    6·1 answer
  • Solve each equation by taking square roots NEED FHIS ANSWER ASAP ILL GIVE BRAINLIEST
    15·1 answer
  • You are planning a trip to Yellowstone National Park, and know that you can save money by driving
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!