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2 years ago

Which expression has a negative value?

Mathematics

2 answers:

Igoryamba2 years ago

3 0

Answer:

A: 7 + 3 (negative 4) (2)

Step-by-step explanation:

Just as a rule of thumb, whenever you multiply or divide one negative number and one positive number, the outcome is always negative. However, whenever you multiply or divide two negative numbers OR two positive numbers, the outcome is always positive.

Now, let's first convert all these words into simple mathematical expressions and then solve them:

A) "7 + 3 (negative 4) (2)" = 7 + 3 * (-4) * 2 = 7 + (-24) = -17

B) "Negative 2 Left-bracket 12 divided by (negative 3) Right-bracket" =

-2 * [12/(-3)] = -2 * (-4) = 8

C) "(15 minus 7) minus (9 divided by 3)" = (15 - 7) - (9/3) = 8 - 3 = 5

D) "Negative 5 Left-bracket 7 + (negative 14) Right-bracket minus 30" =

-5 * [7 + (-14)] - 30 = -5 * (-7) - 30 = 35 - 30 = 5

The only expression that produces a negative value is the first one, A.

Hope this helps!

vredina [299]2 years ago

3 0

Answer:

First one

Step-by-step explanation:

7 + 3 (negative 4) (2)

7 + 3(-4)(2)

7 - 24

= -17

Negative 2 Left-bracket 12 divided by (negative 3) Right-bracket

-2(12/-3)

-2 × -4

(15 minus 7) minus (9 divided by 3)

(15 - 7) - (9/3)

8 - 3

Negative 5 Left-bracket 7 + (negative 14) Right-bracket minus 30

-5(7 + -14) - 30

-5(-7) - 30

35 - 30

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Therefore, the guiding equation will be:

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because $10 is the most people will pay for a neck warmer.

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4 0

3 years ago

(5g + 4) +3 (g - 1) what is the answer <br> just for fun btw..

ExtremeBDS [4]

Answer: 8g + 1

Step-by-step explanation:

(5g + 4) + 3(g - 1)

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Bring like terms together

5g + 3g + 4 - 3

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8g + 1

6 0

3 years ago

Read 2 more answers

Put in ascending order 0.32, -1.9, square root, 2 pi, 2/3

muminat

Answer:

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Step-by-step explanation:

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2 years ago

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gulaghasi [49]

Answer:

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Step-by-step explanation:

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2 years ago

Let the region R be the area enclosed by the function f(x)=ln(x) and g(x)= 1/2x-2. Find the volume of the solid generated when t

Neporo4naja [7]

Answer:

$V=61.66$

Step-by-step explanation:

This problem can be solved by using the expression for the Volume of a solid with the washer method

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where R and r are the functions f and g respectively (f for the upper bound of the region and r for the lower bound).

Before we have to compute the limits of the integral. We can do that by taking f=g, that is

$f(x)=g(x)\\ln(x)=\frac{1}{2}x-2$

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x1=0.14

x2=8.21

and because the revolution is around y=-5 we have

$R=ln(x)-(-5)\\r=\frac{1}{2}x-2-(-5)\\$

and by replacing in the integral we have

$V=\pi \int \limit_{x1}^{x2}[(lnx+5)^2-(\frac{1}{2}x+3)^2]dx\\$

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and by evaluating in the limits we have

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Hope this helps

regards

3 0

3 years ago