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IrinaVladis [17]
3 years ago
8

1. Is (2,1) a solution to the system of equations below?* 1 point x = 2y x+y=3

Mathematics
1 answer:
Anarel [89]3 years ago
8 0

Answer:

yes!

Step-by-step explanation:

put 2 in everywhere you see x and plug 1 in everywhere you see y!

ex: x=2y → 2=2(1) → 2=2 True!

ex; x+y=3 → 2+1=3 → 3=3. True!

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Find the consecutive positive odd integers whose product is 99​
dezoksy [38]

Answer:

9 and 11

Step-by-step explanation:

So let's say that the first integer is x.

That means that the second integer is x+2, since it us the next odd number.

This problem can be easily solved with our mind the answer is 9 and 11, but I'll show you the steps to slove this.

We make an equation using these two numbers:

(x)*(x+2)=99\\

Now all we gotta do is solve for x:

x^2 +2x = 99\\x^2+2x-99=0

Now we use either splitting the middle term or quadratic formula:

x^2+11x-9x+99=0\\x(x+11)-9(x+11)=0\\(x+11)(x-9)=0

Now we split each terma and solve for x:

(x-9)=0\\x=9\\(x+11)=0\\x=-11

Now the question states <em>positive </em>so we can rule out x = -11.

Now we have the first integer x = 9,

the second integer is x+2 = 9+2 =11

So the two consecutive positive odd integers are 9 and 11

4 0
3 years ago
If f(x) = 3x +9 x when f(x) = 30
den301095 [7]

Answer:

x=5/2

Step-by-step explanation:

When f(x)=30, we have 3x+9x=30.

Combining like terms on the right side, we have 12x=30.

Finally, dividing by 12 we get x=30/12.

We note that 30=6*5 and 12=6*2, so 30/12=5/2.

So, \boxed{x=5/2} and we're done!

3 0
2 years ago
Which statement is true about the function f(x)= squared root negative x?
Liono4ka [1.6K]
The answer is the first option: it has the same domain as the function f(x) = - √(-x).

The domain is the set of x-values for which the function is defined.

The square root function is defined only for zero and positve values.

- x is positive when x negative.

So the domain for - √(-x) and √(-x) are the same: x less than or equal to zero.
4 0
3 years ago
Do the ratios 6/3 and 14/7 perform a ratio<br>​
Mazyrski [523]

Answer:

The answer is Yes

Step-by-step explanation:

6 0
3 years ago
Find the area of the triangle
Basile [38]

Answer:

Hello! answer: 76

Step-by-step explanation:

Formula to find area is base × height ÷ by 2 12 + 7 = 19 19 × 2 = 152 152 ÷ 2 = 76 HOPE THAT HELPS!

5 0
3 years ago
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