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4 years ago

(08.03)A system of equations is given below:

Mathematics

2 answers:

trasher [3.6K]4 years ago

8 0

Answer:

6x + 2(−2x + 1) = 22

Step-by-step explanation:

The given equations are :

$y =-2x+1$ ....(1)

$6x+2y=22$ ....(2)

Substitution means, putting in the values of x or y in the second equation.

We have been given the value of 'y' (1) so we will put that in place of 'y' in the (2) equation.

$6x+2(-2x+1)=22$

So, we can solve it further.

$6x-4x+2=22$

$2x=22-2$

$2x=20$

$x=10$

And $y =-2(10)+1$

$y =-20+1$

$y =-19$

So, the 1st option is the right answer: 6x + 2(−2x + 1) = 22

Alecsey [184]4 years ago

7 0

Hello :
<span>y = –2x + 1 ....(1)
6x + 2y = 22 ....(2)
</span><span>by substitution in (2) : 6x+2(-2x+1) =22
6x-4x+2 = 22
2x =20
x =10
in(1) : y =-2(10)+1 = -19 </span>

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The population of a certain species of oak tree in a national forest declines each year by one-fourth. So, after each year, only

dolphi86 [110]

Answer: 25%

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3 years ago

Which expressions are equivalent to 5p+3p+(-9)5p+3p+(−9)5, p, plus, 3, p, plus, (, minus, 9, )? Choose all answers that apply:

Lemur [1.5K]

Answer:

Option B.

Step-by-step explanation:

The given expression is

$5p+3p+(-9)$

We need to find an expression which is equivalent to the given expression.

Combine like terms.

$(5p+3p)-9$

$8p-9$

The simplified form of given expression is 8p-9. So, option A is incorrect.

In option B, the given expression

$3(p+(-3))+5p$

$3(p-3)+5p$

Using distributive property, we get

$3p-9+5p$

Combined liker terms.

$(5p+3p)-9$

$8p-9$

It is same as the simplified form of given expression.

Therefore, the expression 3(p+(-3))+5p is equivalent to the given expression and correct option is B.

7 0

3 years ago

Read 2 more answers

(x^2 - 4)(x^2 + x - 12) = 0

tatiyna

Answer:

is that a T or F

Step-by-step explanation:

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3 years ago

Between which 2 numbers on a number line will √20 be found?

ehidna [41]

Answer:

Since the square root of 20 is around 4.5, we know that ≈4.5 is almost at the half mark between 4 and 5 on the number line.

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2 years ago

Anyone know the answer??

Serggg [28]

Answer:

the second option

Step-by-step explanation:

in ax²+bx+c = 0:

$x = \frac{-b+-\sqrt{b^2-4ac} }{2a}$

subtract both sides by 6 to get to this form, as the right side will be left with 0

6x² + 8x - 6 = 0

here, the coefficient for x² (a) is 6, the coefficient for x (b) is 8, and the remaining number added on (c) is -6

plugging our numbers into the formula, we get

$x = \frac{-8+-\sqrt{(-8)^2-4(6)(-6)} }{2(6)}\\= \frac{-8+-\sqrt{64-(-144)} }{12} \\= \frac{-8+-\sqrt{208} }{12} \\ = \frac{-8+\sqrt{208} }{12} or \frac{-8-\sqrt{208} }{12}\\= 0.53518375848 or -1.86851709182\\= approximately -1.87, 0.54$

8 0

2 years ago