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siniylev [52]
3 years ago
8

PLSSSSS HELP ME!!! 80 Points!!

Mathematics
2 answers:
PIT_PIT [208]3 years ago
8 0

Answer: <em> (-1; 3)</em>

Step-by-step explanation:

<em>y = -x + 2</em>

<em>y = 4x + 7</em>

<em />

<em>4x + 7 = -x + 2</em>

<em>4x + 7 + x - 7 = - x + 2 + x - 7</em>

<em>5x = - 5</em>

<em>x = - 1</em>

<em />

<em>y = 4(-1) + 7</em>

<em>y = 3</em>

<em>Intersection point: (-1; 3)</em>

<u><em>See the solution on the photo</em></u>

maks197457 [2]3 years ago
7 0

Answer:

y=−x+2y=4x+7   NO

y=−x+2               YES

y=4x+7            

Multiply the first equation by 4, obtaining:              4y = -4x + 8

Add the 2nd equation to this result:                          y = 4x  + 7

                                                                            --------------------

                                                                                5y = 15, and y = 3

Then, using the first equation, determine x:

y = 3 = -x + 2

      1 = -x, so x = -1

The solution is (-1, 3)

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Need answer for d with working
son4ous [18]

Answer:

Question D.

Pretty simple if you know what the distributive property is. In this equation, you notice 2 fractions outside the parenthesis. This means you must multiply this fraction by every number within its corresponding parenthesis. So, if you distribute the new equation would be (\frac{5}{4}y+ 1)=(\frac{2}{3}y-\frac{1}{3}). After this isolate the variable y and solve. I'll leave that to you so you can get something out of it, because my entire explanation would be useless if you just looked at the answer and left, not knowing how to do it in the future. :)

4 0
3 years ago
Rachel has 60 scones. She sells them to Robbie, Cameron, Louis, Tom and Charlie in that order. Each customer buys more scones th
Korvikt [17]
Robbie bought the smallest amount. Let's use x for that amount.
Let's use n for amount that each following customer increases.

We have:
Robbie=x
Cameron=x+n
Louis=x+n+n
Tom=x+n+n+n
Charlie=x+n+n+n+n

We know that they bought total of 60 scones.
Robbie + Cameron + Louis + Tom + Charlie = 60
x + x+n + x+n+n + x+n+n+n + x+n+n+n+n = 60
5x + 10n = 60 /:5
x + 2n = 12

We are also given this information:
(Robbie + Cameron) = 3/7 * (Louis + Tom + Charlie)
We insert the equations from above:
(x + x+n) = 3/7 * (x+n+n + x+n+n+n + x+n+n+n+n) 
2x + n = 3/7 * (3x + 9n) /*7
14x + 7n = 3* (3x + 9n)
14x +7n = 9x + 27n
We take everything on the left side.
14x + 7n - 9x - 27n = 0
5x - 20n = 0/:5
x - 4n = 0

Now we have two equations:
x + 2n = 12
x - 4n = 0
We solve second one for x and insert it into first one.
x + 2n = 12
x = 4n

4n + 2n =12
6n = 12 /:6
n = 2
x=4*2
x=8


Now we can solve for the amount for each customer.
Robbie=x = 8
Cameron=x+n = 8 + 2 = 10
Louis=x+n+n = 8 + 2 + 2 = 12
Tom=x+n+n+n = 8 + 2 + 2 + 2 = 14
Charlie=x+n+n+n+n = 8 + 2 + 2 + 2 + 2 = 16
7 0
3 years ago
Latoya is on her way home in her car. She has driven 15 miles so far, which is three-fourths of the way home. What is the total
zepelin [54]

Answer:

since she is 3/4 the way home she has to go 20 miles cause 15/20 is equal to 3/4

Step-by-step explanation:

6 0
3 years ago
Pls help asap!! Hhuwdqnjwl
vampirchik [111]

Answer:

14

Step-by-step explanation:

To get the answer, add the whole numbers together and then add the fractions together:

9 + 4 = 13

(You can even stop here because 14 is the closest to 13)

Now, add the fractions:

\frac{2}{3}+\frac{1}{5}

To add fractions you have to have a common denominator. To find the common denominator multiply 3 by 5, and 5 by 3. Like this:

(\frac{5}{5})\frac{2}{3}  + \frac{1}{5} (\frac{3}{3} )

Simplify:

\frac{10}{15} +\frac{3}{15}              Distribute everything from above

\frac{13}{15}                      Add

So, the whole fraction will look like this 13\frac{13}{15}. This is closest to 14.

Hope this helps!! Ask questions if you need!

7 0
1 year ago
Read 2 more answers
Find the greatest common factor of 16 and 9.
Anettt [7]
The greatest common factor 16 and 9 is one.

The factors of 16 are 1, 2, 4, 8, 16.

The factors of 9 are 1, 3, 9.

The only factor common to both is 1.
3 0
3 years ago
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