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RUDIKE [14]
3 years ago
7

The sum of two numbers is 19, and their difference is 55. What are the two numbers?

Mathematics
1 answer:
Vilka [71]3 years ago
5 0

Answer:

37 and -18

Step-by-step explanation:

Let one number be x and other y

1 x + 1 y = 19 .............1

1 x -1 y = 55 .............2

Eliminate y

multiply (1)by 1

Multiply (2) by 1

1 x 1 y = 19

1 x + -1 y = 55

Add the two equations

2 x = 74

/ 2

x = 37

plug value of x in (1)

1 x + 1 y = 19

37 + 1 y = 19

1 y = 19 -37

1 y = -18

y = -18

37 and -18

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What is(14x2-27x+9)/(7x-3)?
Ann [662]

Answer:

 (-7x - 3) • (2x + 3)

Step-by-step explanation:

7 0
3 years ago
A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the cars average accelerati
Ray Of Light [21]

Answer:

v_0(initial velocity)           v_f(final velocity)     a(acceleration)

v_0=70 km/h    v_f= 0 km/h( rest)

Kinematics equation is a=(v_f-v-0)/time

a=(0-70)/(7/3600)  which means it decelerates at -36000 km/h

This number is humongous; I would advise you to re-check the problem and see if the the time it takes is 7 hours rather than 7 seconds. Notice that I put the time as 7/3600 because it is 7 seconds which should be converted to hours.



3 0
2 years ago
What is the solution of​
marta [7]

Answer:

x

Step-by-step explanation:

Firstly, we know that the solution cannot contain \leq or \geq as when x=3, the equation is undefined. This cuts the options in half

When we plug in a value that is less than 3, we always get a value less than 1. This means that when added to 3, we will always get a value less than 4.

8 0
3 years ago
A liquid solution is slowly leaking from a container. The graph shows the milliliters of solution, y, remaining in the container
Burka [1]

Answer:

90 minutes

Step-by-step explanation:

See attachment for graph.

First, we need to determine the slope.

When y = 900, x = 0

When y = 600, x = 30

The slope is then calculated as:

m = (y2 - y1)/(x2 - x1)

m = (600 - 900)/(30 - 0)

m = -300/30

m = -10

Next, we determine the equation of the line using

y - y1 = m(x - x1)

So, we have:

y - 900 = -10(x - 0)

y - 900 = -10x

y = 900 - 10x

When the container is empty, y = 0.

So, we have:

0 = 900 - 10x

Collect Like Terms

10x = 900

Solve for x

x = 900/10

x = 90

3 0
3 years ago
Please help I’m so confused 25 points and brainliest!!
il63 [147K]

Answer:

1=15.7

2:31.4

3:12.5

Step-by-step explanation:

1=5×3.14=15.71

2:5×2=10×3.14=31.42

3:39.25÷3.14=12.5

hope this helps

5 0
3 years ago
Read 2 more answers
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