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3 years ago

How to subtract fractions with unlike denominators khan academy?

1 answer:

6 0

First find the LCD of the denominators then convert the fractions. Then you can subtract.

for example

2/7 - 1/4

LCD of 4 and 7 is 28 so we convert to fractions with denominator 28

1/4 = 1*7 / 4*7 = 7 /28

2/7 = 2*4 / 7*4 = 8/28

so 2/7 - 1/4 = 8 /28 / 7/28 = 1/28 answer

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On a river you must release any fish that you catch ifvit measures less than 12 inches. Define a variable and then write an alge

malfutka [58]

Let f = fish

If f < 12, let the fish go.

We cannot catch a fish measuring 11.99 inches.

If f = fish, then f < 11.99. It must be released.

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3 years ago

The points on this graph represent a relationship between r- and y-values. Which

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3 years ago

11) To approach a runway, a pilot must begin a 10° descent

jeyben [28]

Answer:

the plane 2.2 miles away from the runway

Step-by-step explanation:

Given the data in the question and as illustrated in the image below;

from the image, using trigonometric ratio;

SOH CAH TOA

sin = opposite / hypotenuse

sin10° = 0.38 / x

xsin10° = 0.38

x = 0.38 / sin10°

x = 0.38 / 0.173648

x = 2.1883 miles ≈ 2.2 miles { the nearest tenth of a mile }

Therefore, the plane 2.2 miles away from the runway

7 0

3 years ago

HELPPPPP: An ipod cost $200. Ivy is going to save money for the ipod by babysitting for $15 per week. Ivy already has $32 saved.

soldier1979 [14.2K]

<h2>Forming Equations from Word Problems</h2>

To form an equation from a word problem, we can recognize variables and operations from keywords.

<h2>Solving the Question</h2>

Let the number of weeks be <em>a</em>.

We're given:

Goal amount is $200 at minimum
Money earned is $15a
Current amount is $32

Because $200 is the minimum account required, we know that the amount earned must be greater than or equal to 200.

$200\leq$

Our current savings and money can be calculated by adding 15a and 32:

$200\leq15a+32$

<h2>Answer</h2>

$200\leq15a+32$

4 0

2 years ago

What the difference 400 273

Lelu [443]

400 - 273 = 127

Hope this helps :)

6 0

3 years ago

Read 2 more answers