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mr_godi [17]
3 years ago
7

Collin wants to solve this system of equations. Which number can he multiply the first equation by so that when the two equation

s are added together, the x term is eliminated?
1/2x + 1/4y = 5
2x + 3/8y = 5

A. -4
B. -2
C. 2
D. 4
Mathematics
2 answers:
Dvinal [7]3 years ago
8 0

Answer:

A.-4

Step-by-step explanation:

I just took the test

siniylev [52]3 years ago
4 0
If u multiply the first equation by -4, u get -2x - y = -20

and when u add the 2 equations..
-2x - y = -20
2x + 3/8y = 5
-----------------
0 - 5/8y = -15.....u notice that the x terms r eliminated.

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Please HELP, ASAP!
Natasha_Volkova [10]
Idk u tell me cause im not the one
3 0
3 years ago
Rewrite in mathematical language. Every negative integer J is less than or equal to its inverse.
Luda [366]

Answer:

-J \leq J

Step-by-step explanation:

Given

Negative integer J

Required

Represent as an inequality of its inverse

The question didn't state if it's additive inverse or multiplicative inverse;

<em>Since the question has to do with negation, I'll assume it's an additive inverse</em>

<em></em>

The inverse of -J is +J

To represent as an inequality (less than or equal), we have:

-J \leq +J

Solving further, it gives

-J \leq J

3 0
3 years ago
How do u do this problem: W/6+5/8=-1 3/8 <br> I got this answer: -1 53/64
Kobotan [32]
We have question
\frac{W}{6}+ \frac{5}{8} =-1 \frac{3}{8}    
\frac{W}{6} + \frac{5}{8} =- \frac{11}{8}  <span> /*8      (multiply both sides by 8)</span>
\frac{W8}{6} + \frac{5}{1} =- \frac{11}{1}  /*6      (multiply both sides by 6)
8W+5*6=-11*6      /-30 both sides
8W=-66-30
8W=-96
W=-12
6 0
3 years ago
Read 2 more answers
How much string is out if a kite is 100 feet above the ground and the string makes an angle of 65° with the ground?
olasank [31]
You have a right triangle situation here, and what you are looking for is the length of the hypotenuse. The leg perpendicular to the ground is 100, and the base angle that is NOT the right angle, is 65. So your equation is set up like this: sin 65 = 100/x. Rearrange that a bit to get x alone: x = 100/ sin 65. Make sure your calculator is in degree mode and solve for x. x = 110.34 feet of string.
5 0
3 years ago
In the figure below, segment AC is congruent to segment AB.
jeyben [28]
<span>Triangle ACD is similar to triangle ABD</span>
8 0
3 years ago
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