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Goryan [66]
3 years ago
6

I need to know how to solve -4-(2+4(-6)-4-(2^2-5*2))

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
4 0

Answer:

16

Step-by-step explanation:

This problem requires PEMDAS

Parentheses ( )

Exponents ^

Multiplication

Division

Add

Subtract

Start by solving anything in parentheses. There's an exponent within the parentheses, so we change that 2^2 into 4 and also make sure to multiply 5 x 2 before subtracting.

-4 - (2 + -24 - 4 - (4-10))

-4 - (2 + -24 - 4 - (-6))

Again, solve parentheses first.

-4 - (-22 - 4 - (-6))

-4 - (-26 + 6)

-4 - (-20)

-4 + 20

Answer is 16

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Find the value of y when x equals 4.<br> -3x + 9y = -57
ANTONII [103]

Answer:

y = -5

Step-by-step explanation:

Isolate y:

-3x + 9y = -57

9y = -57 + 3x

y = (-57/9) + (3/9)x

Substitute for x:

y = (-57/9) + (3/9)(4)

y = (-57/9) + (12/9)

y = (-45/9)

y = -5

4 0
2 years ago
Read 2 more answers
Mr. Vargas is buying used computer equipment. He buys 3 keyboards and 4 mice. He spends $42. If the items are all the same price
IgorC [24]

Answer:

Hello.

The answer is $6 each item.

Step-by-step explanation:

If all of the items are the same price, then we have a total of 7 items ( 3 keyboards + 4 mic = 7 items).

So at the end is: 7 items ÷ $42 = $6.


4 0
3 years ago
Can you please help me??
Dominik [7]

Answer: B

Step-by-step explanation: I know

8 0
1 year ago
What is the circumference and area of a pool with a 30 feet diameter
-Dominant- [34]
Diameter = 30
radius = 15
area = pi x 15 x 15 = 225pi
circumference = 30pi
8 0
3 years ago
Sin(x-y) if cos x =8/17 and cos y = 3/5
Dima020 [189]
\sin(x-y)=\sin x\cos y-\sin y\cos x

Since \cos x=\dfrac8{17}, you have

\sin x=\sqrt{1-\cos^2x}=\sqrt{1-\left(\dfrac8{17}\right)^2}=\dfrac{15}{17}

and since \cos y=\dfrac35, you have

\sin y=\sqrt{1-\cos^2y}=\sqrt{1-\left(\dfrac35\right)^2}=\dfrac45

So,

\sin(x-y)=\dfrac{15}{17}\times\dfrac35-\dfrac45\times\dfrac8{17}=\dfrac{13}{85}

Note that this assumes that both \sin x and \sin y are positive, or 0.
6 0
3 years ago
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