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jasenka [17]
2 years ago
10

X + y = 4 x + 2y = 6

Mathematics
1 answer:
sasho [114]2 years ago
4 0

Step-by-step explanation:

Using Substition method

x=4-y

(4-y)+2y=6

4-y+2y=6

-y+2y=6-4

y=2

input the value y=2 into x=4-y

x=4-2

x=2

To check if you are right

Since x=2 and y=2

x+y=4

2+2=4

x+2y=6

2+(2×2)=6

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A rectangle with a length of x - 4 and a width of 8 has a perimeter of 34. what is the value of x?
Afina-wow [57]

Answer:

13

Step-by-step explanation:

2(x-4+8)=34

x-4+8=17

x+4=17

x=13

5 0
2 years ago
How much paint Bella need to make 1 poster if she used 1/4 of a can to make 2 posters?
avanturin [10]

Answer:

1/8th I think.Hope that helps! God Bless!!

Step-by-step explanation:

7 0
3 years ago
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How would you multiply (3x-8)(2x^2+4x-9)
Naily [24]
(3x-8)(2x^2+4x-9)= <span><span><span>6x^3</span>−<span>4x^2</span></span>−59x</span>+72<span>
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4 0
3 years ago
A 3
Andrew [12]

Answer:

There are (63) combinations. The notation means "six choose three". Out of six items (flavors) choose three.

(nk)=n!k!(n−k)!.

(63)=6!3!3!.

Think of it this way. There are 6 ways to choose a flavor. Once you choose, there are 5 ways to choose the next. After that, there are 4 flavors left. which is 6!/3!=6⋅5⋅4⋅3⋅2⋅13⋅2⋅1=6⋅5⋅4=120.

But, you could have chosen {chocolate,vanilla,strawberry} and you get the same combination as {vanilla, strawberry, chocolate} so we have to divide by 3!=3⋅2⋅1=6 to account for the order of choosing.

So the number of combinations of flavors is (63)=1206=20.

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7 0
3 years ago
What does -3 1/2+ (-8 1/4)!equal?
MissTica

Answer:

-11\frac{3}{4}

Step-by-step explanation:

-3\frac{1}{2} + -8\frac{1}{4} equals;

-3\frac{1}{2} - 8\frac{1}{4}

Putting it in improper function way:

-\frac{7}{2} - \frac{33}{4} = \frac{-14 - 33}{4} = -\frac{47}{4}

-\frac{47}{4} in simplified form equals -11\frac{3}{4}

8 0
4 years ago
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