3 years ago

|z−7|−|z−9| , if z<7? Write without absolute value

Mathematics

1 answer:

Deffense [45]3 years ago

5 0

Answer:

z+7-z+9

Step-by-step explanation:

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The ages of two brothers are in the ratio two to three, but in eight years, the ratio of their ages will be three to four. What

Darina [25.2K]

X = older brother
y = younger brother

Equation 1: x/y = 2/3 ⇒ x = 2y/3
Equation 2: x + 8/y + 8 = 3/4

$( \frac{2y}{3} + 8) / y +8 = \frac{3}{4}$
$(2y + 24)/3 = y + 8 = \frac{3}{4}$
$2y + 24 = 3 (y + 8) = \frac{3}{4}$
$2y + 24 = 3y + 24 = \frac{3}{4}$
$4 (2y + 24) = 3 (3y + 24)$
$8y + 96 = 9y + 72$
$y = 24$

The age of the older brother is 24.

$x = \frac{2y}{3} = \frac{2*24}{3}$
$x = \frac{48}{3}$
$x = 16$

The age of the youngest brother is 16.

5 0

3 years ago

Read 2 more answers

How would I answer this question? Can someone please help me, and explain why. Thank you.

Serjik [45]

Can you tell me what you need help because it doesn't says

4 0

3 years ago

Please help due ASAP <br> Please show workings!!

Kazeer [188]

Answer:

FC = 27, QC = 18