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serious [3.7K]
3 years ago
9

How do I do 1/2 divided by -2/5 + -1/4

Mathematics
1 answer:
anastassius [24]3 years ago
4 0

IF -2/5 + -1/4 IS IN PARENTHESES:

skip this part if its not

(1/2) / (-2/5 - 1/4)

(-2/5 - 1/4) is equivalent to (-8/20 - 5/20) = -13/20

substitute -13/20 for (-2/5 - 1/4)

1/2 / -13/20

remember that division is the inverse of multiplication, so if we flip the second fraction, we can change the division sign to multiplication (when doing this, never flip the first fraction, you will not get the right answer)

1/2 * -20/13

simplify -20/2 to get -10

1 * -10/13 = <u>-10/13</u>

IF -2/5 + -1/4 IS NOT IN PARENTHESES:

1/2 / -2/5 +-1/4

PEMDAS : multiplication/division comes before addition / subtraction

1/2 / -2/5 = (apply the flip rule : read the chunk of text above if you don't know what it is) 1/2 * -5/2 = -5/4

subtract 1/4 form -5/4 now

-5/4 - 1/4 = -6/4

simplify

= <u>-3/2</u>

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Help me please thanks !
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4 0
3 years ago
Answer soon please! Question and answers are in the photograph attached.
-BARSIC- [3]

Answer:

Δ MLP  ~  Δ HKG

By S-A-S similarity Postulate.

Step-by-step explanation:

Given:

In Δ MLP

MP = 20 ,

LP = 15

∠ P = 42°

In Δ HKG

HG = 16 ,

KG = 12

∠G = 42°

To Prove:

Δ MLP ~Δ HKG

Proof:

In Δ MLP and Δ HKG

\dfrac{MP}{HG}= \dfrac{20}{16}=\dfrac{5}{4} ..........( 1 )

\dfrac{LP}{KG}= \dfrac{15}{12}=\dfrac{5}{4}  ..............( 2 )

∴ \dfrac{MP}{HG}=\dfrac{LP}{KG} ...From 1 and 2

       ∠P ≅ ∠ G = 42°          ...............Given

∴ Δ MLP ~Δ HKG ......{ By S-A-S similarity test}............Proved

4 0
3 years ago
Which equation demonstrates the use of a simple interest formula, to compute the interest earned on $70 at 3% for 12 years?
Hitman42 [59]
I = 70 * 0.03 * 12

Hope this helps!
8 0
3 years ago
What is the y-value in the solution to this system of linear equations?
Leona [35]
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3 years ago
What's the result of subtracting the second equation from the first ? please provide steps &lt;3
BaLLatris [955]
Ans will be 4x + 3y = 11
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3 years ago
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