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2 years ago

8

The soution to -2 (1-4x)=3x+8 is a 6/11 b 2 c -10/7 d -2

2 answers:

alexandr1967 [171]2 years ago

6 0

2

Mark brainliest please

Hope this helps

stira [4]2 years ago

4 0

The answer is a
rearrange the terms
2(1-4x)=3x+8 to this
2(-4x+1)= 3x+8. brainliest please

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A school is planning to construct two rectangular play areas in the playground. The length of play area A must be 1 foot longer

Anna11 [10]

Answer:

А.The system has two solutions, but only one is viable because the other results in a negative width.

Step-by-step explanation:

Given

Let:

$L_A \to$ length of play area A

$W_A \to$ width of play area A

$L_B \to$ length of play area B

$W_B \to$ width of play area B

$x \to$ Area of A

$y \to$ Area of B

From the question, we have the following:

$L_A = 1 + 4W_A$

$W_B = 2 + W_A$

$L_B = 2 + 3W_B$

$x = y$

The area of A is:

$x = L_A * W_A$

This gives:

$x = (1 + 4W_A) * W_A$

Open bracket

$x = W_A + 4W_A^2$

The area of B is:

$y = L_B * W_B$

$y = (2 + 3W_B) * ( 2 + W_A)$

Substitute: $W_B = 2 + W_A$

$y = (2 + 3(2 + W_A)) * ( 2 + W_A)$

Open brackets

$y = (2 + 6 + 3W_A) * ( 2 + W_A)$

$y = (8 + 3W_A) * ( 2 + W_A)$

Expand

$y = 16 + 8W_A + 6W_A + 3W_A^2$

$y = 16 + 14W_A + 3W_A^2$

We have that:

$x = y$

This gives:

$W_A + 4W_A^2 = 16 + 14W_A + 3W_A^2$

Collect like terms

$4W_A^2 - 3W_A^2 + W_A -14W_A - 16 =0$

$W_A^2 -13W_A - 16 =0$

Using quadratic calculator, we have:

$W_A = -14.1$ or $W = 1.13$ --- approximated

But the width can not be negative; So:

$W = 1.19$

7 0

2 years ago

Write an equation in slope-intercept form for the line that satisfies the following condition. slope 7, and passes through (5, 3

allsm [11]

Y = mx + b
slope(m) = 7
(5,30)...x = 5 and y = 30
now we sub and find b, the y int
30 = 7(5) + b
30 = 35 + b
30 - 35 = b
-5 = b

so ur equation is : y = 7x - 5 <==

7 0

2 years ago

Please help will give branliest

NikAS [45]

-2x+8y-3

Hope this helps! :)

3 0

2 years ago

Read 2 more answers

The hypotenuse of a 45°-45°-90° triangle measures 7√2 units. what is the length of one leg of the triangle

Leto [7]

7 because a(one side)= 1/sqrt2 * hypotenuse (7*sqrt2) THis equals 7

8 0

2 years ago

Read 2 more answers

3. Escribe la ecuación de la elipse que cumple con:<br> F1(-3,0) F2(3,0) y a=4

maks197457 [2]

Answer:

90

Step-by-step explanation:

7 0

2 years ago