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alexira [117]
3 years ago
12

1/2 - [-1/4+2/3] how do you solve this value of the expression

Mathematics
1 answer:
Shkiper50 [21]3 years ago
3 0

Answer:

1/12

Step-by-step explanation:

1/2-[-1/4+2/3]

1/2-[-3/12+8/12]

1/2-[5/12]

1/2-5/12

6/12-5/12

1/12

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Maddie swims the hundred meter freestyle in 30 seconds what is her average speed in meters per minute​
Naily [24]
Answer: 200 meters per minute

Explanation: we know that she can run 100 meters per 30 seconds. the question is asking in terms of minutes, however. we have to convert the seconds into minutes. How many minutes is 30 seconds? well, 60 seconds are in a minute so 30 seconds are in half a minute. 30 seconds = .5 minutes.

Now, we have to find how many meters she runs per minute. this means how many meters she runs in one minute. we create a proportion:

100 meters/ .5 minutes = x meters / 1 minute

we cross multiply to get 100 = .5x

then, we simplify by dividing each side by .5 which equals

200=x
3 0
2 years ago
Geometry sucks please help ​
ehidna [41]

Answer:

  a. AB = 3.4 ft

  b. AE = 1.6 ft

Step-by-step explanation:

SOH CAH TOA reminds you of the relationship between trig functions and right triangle sides.

a. Cos = Adjacent/Hypotenuse

  cos(28°) = BE/BA = 3 ft/BA

Multiplying by BA and dividing by cos(28°), you get ...

  BA = (3 ft)/cos(28°) ≈ 3.4 ft

___

b. Tan = Opposite/Adjacent

  tan(28°) = AE/BE = AE/(3 ft)

Multiplying by 3 ft, you get ...

  AE = (3 ft)·tan(28°) ≈ 1.6 ft

5 0
3 years ago
Ryan and Allison want to build a ramp to help their elderly cat, Simms, walk up the bed. They
Harman [31]

Answer:

Step-by-step explanation:

7 0
2 years ago
There is a line whose y-intercept is 5 and whose slope is 1. What is its equation in
Mkey [24]

Answer:

y = x + 5

Step-by-step explanation:

y = mx + b

m -> slope ; m = 1

b -> y-intercept ; b = 5

y = 1x + 5

3 0
2 years ago
Simplify algebraic expression 3/4 (1/2X - 12) + 4/5
Nata [24]
\frac{3}{4} ( \frac{1}{2} x-12)+ \frac{4}{5} = 

=\frac{3}{4} ( \frac{x}{2} -12)+ \frac{4}{5}

= \frac{3x}{8} -9+ \frac{4}{5}

= -\frac{41}{5} + \frac{3x}{8}


The answer is: -\frac{41}{5} + \frac{3x}{8}

8 0
3 years ago
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