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3 years ago

Can someone help me with this question please

Mathematics

2 answers:

Yanka [14]3 years ago

6 0

Answer:

$x < - 8$

First answer is correct

Step-by-step explanation:

$3 - (2x - 5) < - 4(x + 2) \\ 3 - 2x + 5 < - 4x - 8 \\ 3 + 5 + 8 < + 2x - 4x \\ 16 < - 2x \\ \frac{16}{ - 2} < \frac{ - 2x}{ - 2} \\ x < - 8$

hope this helps you.

brainliest appreciated

good luck! have a nice day! 

Lunna [17]3 years ago

4 0

Answer:

x <-8

Step-by-step explanation:

3-(2x-5) < -4(x+2)

Distribute

3 -2x+5 < -4x-8

Combine like terms

8 -2x < -4x-8

Add 4x to each side

8 -2x+4x< -4x-8+4x

8+2x < -8

Subtract 8 from each side

8-8+2x< -8-8

2x<-16

Divide by 2

2x/2 < -16/2

x <-8

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Juli2301 [7.4K]

The first step to solving this expression is to reduce the numbers with 9.
-7 × 16
Now we need to multiply the two numbers together using the Rules of Signs for Multiplication. They state that multiplying a negative and a positive equals a negative: (-) × (+) - (-). Keeping this in mind,, when you multiply the two numbers together you should get -112.
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3 years ago

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Arte-miy333 [17]

Answer:

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Step-by-step explanation:

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3 years ago

3 SUPER hard math questions HELP!

tigry1 [53]

The first one is 10.5
The second is y10
And the third is 7

8 0

4 years ago

pls answer I'll mark brainliest the question is in the picture also show me how you solved the problem.

zzz [600]

Answer:

D 36πa^6b^9

Step-by-step explanation:

Step 1. Write the formula for the volume of a sphere.

V = (4/3)πr³

Step 2. Replace r with the given radius. Since the given radius is an expression, remember to enclose it in parentheses and cube the entire expression.

V = (4/3)π(3a²b³)³

Step 3. Simplify the expression. Start by cubing each factor inside the parentheses.

V = (4/3)π ×(3)³(a²)³(b³)³

To raise an exponent to an exponent, multiply the exponents.

V = (4/3)π × 27a^6b^9

V = (4/3 × 27)πa^6b^9

V = 36πa^6b^9

Answer: D 36πa^6b^9

3 0

3 years ago

A consumer advocacy group tested the "on-air" lifetimes a random sample of 241 cell phone batteries. The mean lifetime was 3.2 h

snow_tiger [21]

Using the Empirical Rule, it is found that 229 batteries have lifetimes between 3.0 hours and 3.4 hours.

--------------------------

By the Empirical Rule, in a normal variable: 68% of the measures are within 1 standard deviation of the mean, 95% are within 2 and 99.7% are within 3.

--------------------------

Mean of 3.2 hours with a standard deviation of 0.2 hours.

3 = 3.2 - 2(0.1)

3.4 = 3.2 + 2(0.1)

Thus, between 3 and 3.4 hours is within 2 standard deviations of the mean, which is 95%.
Out of 241 batteries: $0.95(241) = 229$

229 batteries have lifetimes between 3.0 hours and 3.4 hours.

A similar problem is given at brainly.com/question/24552083

4 0

3 years ago