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sesenic [268]
3 years ago
5

Please help me!!! Solve the system by substitution. y=-x -2x+5y=-28

Mathematics
2 answers:
STALIN [3.7K]3 years ago
7 0
This is how I solved it !! Hope it helped , if you got any question about any step please let me know ;)

Elena-2011 [213]3 years ago
4 0

Answer:

(4,-4)

x=4

y= -4

Step-by-step explanation:

We know that y is equal to and so we can plug the y value in for x into the other equation

-2x+5(-x)= -28

Solve for x

-2x-5x= -28

-7x= -28

x=4

Now that we know that x= -4 we can plug this into one of the two starting equations and solve for y

y= -(4)

y= -4

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The rartio of cookies to milk is 3:1 .if there are 25 glasseees of milk how many cookies are there
nevsk [136]

Answer:

75

Step-by-step explanation:

the ratio of cookies to milk is 3:1

so 25 * 3  = 75

hope this helps :)

6 0
3 years ago
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The figure shows a regular hexagonal prism.
Scrat [10]

Answer:

A.415.69cm

b.323.14

Step-by-step explanation:

The height would be 10cm

The length would be 4cm

3 0
3 years ago
What is the range of f(x)?<br> {xl-2 {x|-2 {yl-5 {yl-5 sy&lt;-1}
Bas_tet [7]

Answer:

-5≤y≤-1

Step-by-step explanation:

The range is the values that y takes

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7 0
3 years ago
!!HELP!! algebra two!! multiply and combine like terms to write as the sum of difference of monomials!! a-i !!!explanation, if p
vazorg [7]

Answer:

a. 10a + 8a²

c. 12z + 3z²

e. -20 + x + x²

g. -64 + 9z⁴

i. y¹⁰⁰¹ + 8y¹³²⁰⁰

Step-by-step explanation:

According to the Six Exponential Rules, whenever you divide terms, you subtract the exponents, and of course whenever you multiply terms, you add the exponents.

a. The variables have an invisible degree term of 1, so when multiplied, you get 8a².

c. ⅛ of 24 and 96 means dividing both numbers by its multiplicative inverse, which is 8: ⅛[24] → 24 ÷ 8; 3; ⅛[96] → 96 ÷ 8; 12. Then of course, you still have to follow the exponential procedure.

e. This is just like the Quadratic Equation, y = <em>Ax² + Bx + </em><em>C</em>. All you have to do is do what I like to call FOIL:

F - Multiply the first terms in each set of parentheses FARTHEST TO THE LEFT

O [Outermost] - Multiply the first term in the first set of parentheses FARTHEST TO THE LEFT by the last term in the second set of parentheses FARTHEST TO THE RIGHT

I [Innermost] - Multiply the last term in the first set of parentheses FARTHEST TO THE RIGHT by the first term in the second set of parentheses FARTHEST TO THE LEFT

L - Multiply the last terms in each set of parentheses FARTHEST TO THE RIGHT

Doing this will give you the above answer.

g. See explanation letter <em>e</em><em>.</em>

i. Now, as I mentioned before, when you multiply terms, you add the exponents. In addition, that decimal in the far right corner, is equivalent to ⅛, and ⅛ of 8 is 1, so we know that 1 is our INVISIBLE coefficient next to the <em>y</em><em>,</em><em> </em>then you just add 1 to 1000 in the exponents because of the invisible degree of 1.

If you are ever in need of assistance, do not hesitate to let me know by subscribing to my You-Tube channel [USERNAME: MATHEMATICS WIZARD], and as always, I am joyous to assist anyone at any time.

**I have a video that talks about the Six Exponential Rules. It is titled "Six Exponential Procedures". Go check out the channel to watch it and gain more assistance.

4 0
3 years ago
The area of a garden is (x^2-x-6) square yards. Find the dimensions of the garden is x=5
kicyunya [14]
I hope this helps you

7 0
3 years ago
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