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snow_lady [41]
3 years ago
9

X + y = k

Mathematics
1 answer:
lisov135 [29]3 years ago
7 0
If x+y=k, then x=k-y. Substitute k-y for x in the other equation. So (k-y)-y=k. k-2y =k which means y has to be 0 (both k's subtract on both sides). -2y=0. The answer: (k,0). For the second part, get all the parts of the equations on both sides; (make both sides equal zero) 3x-4y-7 and 3x+2y+5. Then subtract. 3x-4y-7-(3x+2y+5) Make it equal to zero again and solve! :) -6y-12=0 -6y=12!! ta da!
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At a​ school, 147 147 students play at least one sport. This is 35 35​% of the students at the school. How many students are at
dsp73

Answer:

420

Step-by-step explanation:

Assuming this is the problem:

At a​ school, 147 students play at least one sport. This is 35​% of the students at the school. How many students are at the​ school?


147/35 = x/100

35x=147*100

35x=14,700

x=420

3 0
3 years ago
Gavin is thinking of a number.8 more than the product of 7 and the number is 120. find the number.
Marta_Voda [28]
<h3><u>The value of the number is equal to 16.</u></h3>

7x + 8 = 120

<em><u>Subtract 8 from both sides.</u></em>

7x = 112

<em><u>Divide both sides by 7.</u></em>

x = 16

3 0
3 years ago
Use what you know about decimals or fractions to explain why (0.2)•(0.002)=0.0004
strojnjashka [21]

Answer:

So any time you are multiplying something, you are making "groups of"

so 3 groups of 2 = 6, 4 groups of 3 = 12

But with decimals or fractions, because they are a value less than zero, the numbers become increasingly small instead of bigger, like standard multiplication.

So for example, 1 group of 1/2 = 1/2

2 groups of 1/4 = 1/2

and so on

hope this helps!

6 0
3 years ago
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zheka24 [161]
It is the third bubble
Hope i helped!
7 0
3 years ago
Read 2 more answers
PLS ANSWER URGENT
san4es73 [151]
A) The given equation has no solution. The absolute value cannot be negative, but must be -9 in order for the equation to be satisfied.


b) |x -7| = 2 . . . . . . . the equation
Solution 1:
  -2 = x -7
  5 = x . . . . . . add 7
Solution 2
  x -7 = 2
  x = 9 . . . . . . add 7

The two numbers are {5, 9}
8 0
3 years ago
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