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3 years ago

I can't figure out this inequality 5+ 5(x + 4) < 20. Any tips on how I can solve?

1 answer:

8 0

Remember you can do anything to an equation or inequality as long as ou do it to both sides
also, when multiplying by a negative number in an inequality, don't forget to flip the sign

5+5(x+4)<20
minus 5 from both sides
5(x+4)<15
divide both sides by 5
x+4<3
minus 4 from both sides
x<-1

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Rihanna planned a rectangular courtyard for a park and made a scale drawing using inches as the unit of measurement. She origina

Eva8 [605]

Answer:

I think it changed from 36x to 48x

Depending on how you look at it, it could have changed from 3x to 4x or 36x to 48x.

If they said it was 18 feet instead of 18 inches, it would be 3x or 4x, but they had it as inches.

18 inches = 1.5 feet

72/1.5 = 48

54/1.5 = 36

So originally, it would have been a scale of 1 in : 36in , but it changed to 1 in : 48 in

Sorry if this was confusing.

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2 years ago

Read 2 more answers

一、225 + 4.8<br> I don’t understand it plz help<br> (And do it step by step...)

nalin [4]

$\bf -\sqrt{225}+4.8~~ \begin{cases} 225=&3\cdot 3\cdot 5\cdot 5\\ &3^2\cdot 5^2\\ &(3\cdot 5)^2\\ &15^2 \end{cases}\\\\\\ -\sqrt{15^2}+4.8\implies -15+4.8\implies -10.2$

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2 years ago

A student solved this problem by working backward. Jared has some flowers. He has 6 more red flowers than yellow flowers. He has

goldenfox [79]

5 + 7 = 12 silver balloons
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2 years ago

What percent is equivalent to 8/40 ? 8% 20% 25% 40%

Nikitich [7]

First you have to get the number on the right 40 to equal 100 so do 40x2=80- +40x1.5= 100

Then do the same thing to the first number 8 so 8x2=16+8x1.5=20

then you have 20/100 right so then that number over 100 is the percent that you get ^-^ 20%

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2 years ago

Read 2 more answers

Using the z table, find the critical value for a=0.024 in a left tailed test

natita [175]

Answer:

Critical value is -1.98.

Step-by-step explanation:

Given:

The value of alpha is, $\alpha=0.024$

Now, in order to find the critical value, we need to subtract alpha from 1 and then look at the z-score table to find the respective 'z' value for the above result.

The probability of critical value is given as:

$P(critical)=1-\alpha=1-0.024=0.976$

So, from the z-score table, the value of z-score for probability 0.976 is 1.98.

Now, in a left tailed test, we multiply the z value by negative 1 to arrive at the final answer. We do so because the area to the left of mean in a normal distribution curve is negative.

So, the z-score for critical value 0.024 in a left tailed test is -1.98.

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3 years ago