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Lilit [14]
4 years ago
15

Solve the question 2-(-4)+(-1)-(-3)

Mathematics
1 answer:
IgorLugansk [536]4 years ago
3 0
Ugh this hurts my head just looking at it, but I'll show the process.

PEMDAS

Addition before subtraction (Not that it matters here).

2 - (-4) is the same as adding 4.  This equals 6.

-1 - (-3) is the same as adding 3.  This equals 2.

Adding these two expressions together equals 8.

Showing my work...

2 - (-4) + (-1) - (-3)

6 + (-1) - (-3)

6 + 2

8


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Find the cost per roll if a bag of five lunch rolls is $2.50.
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5 0
3 years ago
What is 10% of 360? 18 36 90 180
Snowcat [4.5K]

Answer:

36

Step-by-step explanation:

10% of 360=10/100*360=1/10*360=360/10=36

8 0
3 years ago
Read 2 more answers
Please someone help me to prove this. ​
morpeh [17]

Answer:  see proof below

<u>Step-by-step explanation:</u>

Use the Double Angle Identity: sin 2Ф = 2sinФ · cosФ

Use the Sum/Difference Identities:

sin(α + β) = sinα · cosβ + cosα · sinβ

cos(α - β) = cosα · cosβ + sinα · sinβ

Use the Unit circle to evaluate: sin45 = cos45 = √2/2

Use the Double Angle Identities:   sin2Ф = 2sinФ · cosФ

Use the Pythagorean Identity: cos²Ф + sin²Ф = 1

<u />

<u>Proof LHS → RHS</u>

LHS:                                  2sin(45 + 2A) · cos(45 - 2A)

Sum/Difference: 2 (sin45·cos2A + cos45·sin2A) (cos45·cos2A + sin45·sin2A)

Unit Circle:    2[(√2/2)cos2A + (√2/2)sin2A][(√2/2)cos2A +(√2/2)·sin2A)]  

Expand:        2[(1/2)cos²2A  + cos2A·sin2A + (1/2)sin²2A]

Distribute:              cos²2A   + 2cos2A·sin2A + sin²2A  

Pythagorean Identity:    1 + 2cos2A·sin2A

Double Angle:                1 + sin4A

LHS = RHS:  1 + sin4A = 1 + sin4A   \checkmark

6 0
3 years ago
Tanner collected 360 cans and bottles while fundraising for his baseball team. This was 40% of what Reggie collected. How many c
Vanyuwa [196]
The amount Reggie collected is equal to x
\frac{360}{.4}= \frac{x}{1}

x =  \frac{360}{.4} =  \frac{360}{ \frac{4}{10} } =  \frac{360*10}{4} = 900


4 0
3 years ago
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