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OLEGan [10]
2 years ago
14

You are given the system of equations to solve by the elimination method, which is an INCORRECT step that will NOT produce a sys

tem with the same solution? x + 2y = 7 2x − 5y = 5 A) add 5 times the first equation and 2 times the second equation B) multiply the first equation by 2 and subtract the second equation C) multiply the first equation by −2 and add the second equation D) multiply x by 2 in the first equation and subtract the second equation
Mathematics
2 answers:
KonstantinChe [14]2 years ago
7 0

Answer:

D

Step-by-step explanation:

If you're doing to multiply a value by a number, ALL terms in the equation must be multiplied by the same value otherwise you do not have a correct equation.

Ugo [173]2 years ago
6 0

Answer:

D) multiply x by 2 in the first equation and subtract the second equation

Step-by-step explanation:

When you are trying to solve a system of equations you have to eliminate one of the terms so you´ll end up with only a one term equation that is solvave, in this case if you multiply X by 2 you can actually eliminate X from that equation, but by not multiplying all the terms on the equation you end up with a whole different equation and the result wont be accurate.

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Vikentia [17]

Answer:

700 Dollars

Step-by-step explanation:

The expression for solving this is I = prt

So lets start with P, that is our principal or amount of money we start with, and we want to multiply it by our rate, or r , which is 3.5, so we would do 5000 x 0.035 to get 175, then we multiply that by our time or t, which is 4 years, so 175 x 4 = 700 dollars :D

5 0
2 years ago
Read 2 more answers
PLS , help me asap :(( , im so frustrated , idk how to do these :c
kolezko [41]

Answer:

y intercept = 5

Step-by-step explanation:

In analytic geometry, using the common convention that the horizontal axis represents a variable x and the vertical axis represents a variable y, a y-intercept or vertical intercept is a point where the graph of a function or relation intersects the y-axis of the coordinate system. As such, these points satisfy x = 0.

6 0
2 years ago
Read 2 more answers
10 points
Sergeu [11.5K]

Step-by-step explanation:

The mode is 7 because it is 5 times

8 0
3 years ago
in the xy-plane, the line x + y=k, where k is a constant, is tangent to the graph of y=x^2+3x+1. What is the value of k?
Sholpan [36]
When a line and a curve are tangent to each other, they are joined together by 1 point (x,y). So, you equate both equations either in terms of x or y. For this problem, let's equate in terms of y.

y = k - x
y = x² + 3x + 1

k - x = x² + 3x + 1
k = x² + 3x + x + 1
k = x² + 4x + 1

This would be the value of k. Since we are not given the common point, it can only be expressed in terms of x or y.
3 0
3 years ago
When solving an equation in the form ax^2=c by taking square roots, how many solutions will there be?
sergij07 [2.7K]
I think there would be two soulutions. ax^2 and c^2. Hope it's right. sorry if it is not. But hope it is and hope it helps.
7 0
2 years ago
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