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2 years ago

5

Three years ago, dedrick's age was a third of francisca's age. in 13 years, francisca's age will be twice dedrick's age. how old

are they now?

1 answer:

serg [7]2 years ago

3 0

Answer:

Step-by-step explanation:

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Select 2 strategies that we can use to add 438 + 362.

yarga [219]

Answer:

Add 438 + 2 + 60 + 300

440 + 360

Step-by-step explanation:

The last one does not add up to 800

Good luck <3

8 0

3 years ago

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Question 4 (Multiple Choice Worth 5 points) Please help *First is Brainliest*

fiasKO [112]

The answer is D. - 17 because 17 - 17 = 0

Have a nice day!

5 0

3 years ago

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Consider the equation: 12x=13-x^212x=13−x 2 12, x, equals, 13, minus, x, squared 1) Rewrite the equation by completing the squar

Flauer [41]

Answer:

$(x + 6)^2 = 49$

$x = 1$ or $x = -13$

Step-by-step explanation:

Given

$12x = 13 - x^2$

Using Completing the Square

$12x = 13 - x^2$ ---- Add $x^2$ to both sides

$x^2 + 12x = 13 - x^2 + x^2$

$x^2 + 12x = 13$

Divide the coefficient of x by 2; then add the square to both sides

$x^2 + 12x + 6^2 = 13 + 6^2$

$x^2 + 12x + 36 = 13 + 36$

$x^2 + 12x + 36 = 49$

Factorize

$x^2 + 6x + 6x + 36 = 49$

$x(x + 6) + 6(x + 6) = 49$

$(x + 6)(x + 6) = 49$

$(x + 6)^2 = 49$

Hence, the equation is $(x + 6)^2 = 49$

Solving further

Take square root of both sides

$(x + 6) = \sqrt{49}$

$x + 6 = \±7$

$x = \±7- 6$

This implies that

$x = 7 - 6$ or $x = -7 -6$

$x = 1$ or $x = -13$

HEnce, the solutions are $x = 1$ or $x = -13$

6 0

3 years ago

3y-2(y+5)=5y-22 what is the answer. I got y=8

KiRa [710]

Well actually when i did this equation i got y=3 so you might want to recheck your answer and take another look at the steps you took.

Hopefully this helped you ^0^

4 0

3 years ago

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When 6r − 17r = -66 is solved, the result is: A. 6 B. -6 C. -11 D. 11

Anna71 [15]

Answer:

A

Step-by-step explanation:

6r - 17r = -66

Subtract like terms.

-11r = -66

Divide both sides by -11.

r = -66/-11

r = 6

4 0

3 years ago

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