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3 years ago

Write two equations in standard form for two lines that will have the same solution as 4x-5y=7

Mathematics

2 answers:

topjm [15]3 years ago

8 0

Answer:

8x - 10y = 14 is the first one

12x - 15y = 21 is the second :)

Step-by-step explanation:

im pretty sure its correct and i hope i could help !! :)

Lyrx [107]3 years ago

3 0

Answer:

7-4x/y=5

7+5y/x=4

Step-by-step explanation:

hope it's helpful

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What is the frequency heard by a person driving at 15 m/s toward a blowing factory whistle (800. Hz) if the speed of sound is 34

bija089 [108]

Answer:

Answer:

835.29 Hz

Explanation:

When moving towards the source of sound, frequency will be given by

f*=f(vd+v)/v

Where f is the freqiency of the source, vd is the driving speed, v is the speed of sound in air, f* is the inkown frequency when moving forward.

Substituting 800 Hz for f, 340 m/s for v and 15 m/s for vd then

f*=800(15+340)/340=835.29411764704 Hz

Rounded off, the frequency is approximately 835.29 Hz

ı hope ıts true

Step-by-step explanation:

5 0

3 years ago

-x+y-z=17, 4x+3y+z=-10, 2x+y+3z=0

mario62 [17]

Answer:

x = -11, y = 10, z = 4

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

5 0

3 years ago

The graph shows the distance in miles of a runner over x hours. What is the average rate of speed over the interval [9, 11]?

ELEN [110]

Question:

The graph shows the distance in miles of a runner over x hours. What is the average rate of speed over the interval [9, 11]?

A. 2/5

B. 1

C.2

D.5/2

The image of the graph is attached below.

Answer:

Option D: 5/2 is the average speed over the interval [9,11]

Explanation:

The graph shows the distance in miles of a runner over x hours.

Now, we need to determine the average rate of speed over the interval $[9,11]$

The x-axis represents the time taken.

The y-axis represents the distance.

To find the average speed, let us use the formula for speed which is given by

$speed=\frac{distance}{time}$

Thus, substituting the coordinates $(9,6)$ and $(11,11)$ , we have,

$speed=\frac{11-6}{11-9} =\frac{5}{2}$

Hence, the average speed over the interval $[9,11]$ is $\frac{5}{2}$

8 0

3 years ago

Read 2 more answers

If p stays constant and u is doubled what happens to e? given U=EP

Stolb23 [73]

We are given the expression:

U = E * P

The equality symbol “ = “ means that for all cases, the value of U and E * P must always be equal. This means that whatever happens on the left side, must equally happen on the right side.

So what this actually means is that, if we double U so we must also double the expression E * P, that is:

2 U = 2 (E * P)

However since P stays constant in the process, therefore only E is changed, hence:

2 U = P * 2 E

So we can see that E is also doubled.

4 0

4 years ago

Se os três ângulos internos de um triângulo são congruentes.qual e a medida de cada um

Gnesinka [82]

Ángulo exterior, la medida de un ángulo exterior de un triángulo es igual a la suma de las medidas de los dos ángulos interiores no adyacentes.
espero que haya ayudado, por favor, marcame el cerebro.

Q: If the 3 inner angles of a triangle are congruent, what is the measure of each one?
A: Exterior Angle The measure of an exterior angle of a triangle is equal to the sum of the mesures of the two non-adjacent interior angles. Hope it helped please mark me brainliest/

5 0

4 years ago