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aleksklad [387]
3 years ago
5

I will give brainlest and 75 points

Mathematics
1 answer:
Lelechka [254]3 years ago
5 0

Answer:

3

4

2

1

Step-by-step explanation

3.2x+5.7=2.5x. X=-8.142857

10.1x-1.6x+44=-7 x=-6

7.9x+x+4=1.1x-16 x=-2.564103

1/4x+5/2x-2=4-1/4x x=2

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~Help me with this please! I will mark as BRANLIEST and if you answer correctly there would be a 55 point question for you!!!
4vir4ik [10]

Answer:

Simply here we use system of 2 equations.

Step-by-step explanation:

Let x be the cost of one small shirt and let y be that of one large shirt.

(4x +14y =210) (-3)

12x +11y =110

-12x - 42y= -630 note:cross 12x and - 12x

12x +11y =110

__________

-42y +11y = - 630 +110

-31y = -520

Y=520/31

Replace y in second equation:

12x +11y =110

12x +11(520/31) =110

12x +5720 =110

12x =110 - 5720/31

X= - 385/62

So one small shirt costs - 385/62 $

And a large one costs 520/31 $

Though I think there's something wrong in this problem since i verified my answer using calculator the same prices are obtained and as u see the cost of a small shirt is negative which is unbelievable.. So plz make sure from anyone else. I tried my best to help.

5 0
3 years ago
4x^2+4y^2=64<br> what are the domain and range
marissa [1.9K]
Use a graphing tool and you'll see a circle form. This circle has a center of (0,0) and radius of 4. Side note: this equation is equivalent to x^2+y^2 = 16 after you divide everything by 4

Looking at the graph, the smallest x can be is -4. The largest x can be is 4. So the domain in interval notation is [-4,4]

Similarly the range in interval notation is also <span>[-4,4] because the lowest you can go is y = -4. The highest you can go is y = 4</span>
8 0
3 years ago
In a race, there are 14 runners. Trophies for the race are awarded to the runners finishing in first through fourth place. In ho
iVinArrow [24]
Slot method or permutations
14*13*12*11=24024
there are 24024 ways that have different winners

8 0
3 years ago
Read 2 more answers
1. Find the interest generated by a balance of $7800 on a credit card charging 27.8% interest per year over a 30 day period usin
Tema [17]

Answer:

the interest generated over 30 days using banker's rule is $180.7

Step-by-step explanation:

balance =  $7800

credit card charging interest rate per year = 27.8%

interest generated over a 30 day  period =

                                  = P × R ×T

                    = 7800\times 0.278\times \dfrac{30}{360}

                                  =   $180.7

hence, the interest generated over 30 days using banker's rule is $180.7

8 0
3 years ago
How can you tell if a set of bivariate data shows a linear relationship?
stira [4]
Make a scatterplot of the data. Once finished, look at the scatterplot to determine if the data taken holistically appears to be a close to the shape of a line.
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3 years ago
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