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andreyandreev [35.5K]
3 years ago
14

HELPPPPPPP what's the answer and plz explain

Mathematics
1 answer:
Liula [17]3 years ago
4 0
K = 1.2 Short answer.
It's going to seem odd, but one of the ways you could solve this is by multiplying the first equation  by 4. I'll tell you why in a moment.

4(0.3x - 0.7y = 1)     Now remove the brackets.

1.2x - 2.8y = 4          If you want there to be no solution, the way to do it is the make k = 1.2 The second equation becomes.
1.2x - 2.8y = 3

I'm going to give you the graph of this so you will see why there is no solution. Do you see why?

The lines are parallel!! they never meet.

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(a) Write an equation that could be used to answer the question above.
Margarita [4]

The linear equation that can be used to represent the situation using 9, w and 163 is 9w + 63 = 198

The solved equation to find the number of weeks is w = 15

<h3 />

<h3>What is a linear equation?</h3>

Linear equation are equation in which the highest power of the variable is equals to 1.

Suzan is saving money to buy a bike . She already have $63 and is going to save an additional $9 per week. The cost of the bike is $198.

Let

w = number of weeks

The linear equation that can be used to represent the situation using 9, w and 163 is as follows:

using the slope-intercept form,

y = mx + b

where

m = slope

b = y-intercept

Therefore,

  • 9w + 63 = 198

The solved equation to find the number of weeks is as follows:

  • 9w = 198 - 63
  • 9w = 135
  • w = 135 / 9
  • w = 15

learn more on linear equation here: brainly.com/question/26311977

6 0
2 years ago
Solve for x<br><br><br> 6x−2(x+4)=12
aev [14]
To solve for x, we will begin by using the distributive property

6x - 2(x + 4) = 12

6x - 2x - 8 = 12

(always remember to sort your negatives!)

Add like terms 

4x - 8 = 12

Add 8 to both sides

4x = 20

Divide both sides by 4

x = 5
3 0
3 years ago
Read 2 more answers
Write 0.00467 in standard form
meriva

Answer:

\frac{0.00467}{100000}

Step-by-step explanation:

Given :

0.00467

Now,

0.00467=\frac{0.00467}{100000}

Standard form of given equation is :

\frac{0.00467}{100000}

6 0
2 years ago
The expression (X + 3)(x + 2) is the product of two binomials. Which expression is also a product of binomials?
kow [346]

Answer:

B

Step-by-step explanation:

Binomials are expressions containing the sum (or difference) of two terms.

A. is not the answer because pq and qp are <u>products</u>.

C. is not the answer because 3x is not a sum/difference.

D. is not the answer because it is one binomial, not two muliplied together.

6 0
3 years ago
An oil company fills 1/10 of a tank in 1/4 hour. At this rate, which expression can be used to determine how long it will take f
irina [24]
I'm not 100% sur what it is asking but I think the expression would be
 
15 min. * 10 = min. till the tank is full
6 0
3 years ago
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