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Otrada [13]
3 years ago
8

Sierra says that she can simplify the side of the inequality shown by combining the terms within the parentheses but that she​ c

an't do the same thing on the side. Is Sierra​ correct? Explain.
Mathematics
1 answer:
stiv31 [10]3 years ago
8 0

Answer:

Yes, Sierra is correct

Step-by-step explanation:

Given

4(y + 7) > -3 (4 + 5)

Required

Is she correct

The right parenthesis has 4 + 5.

This can be simplified as: 4 + 5 = 9

So, we have:

4(y + 7) > -3 (4 + 5)

4(y + 7) > -3 *9

The left parenthesis has y + 7.

This cannot be simplified because y is a variable and 7 is a number.

<em>Hence, Sierra is correct.</em>

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2x-3y greater than or equal to -9
Viefleur [7K]

Answer:

Make x 0 and y 3

Step-by-step explanation:

0 multiplied by 2 is 0

-3 multiplied by 3 is -9

0-9 = -9

8 0
3 years ago
Help see if i got this right please
irinina [24]

Answer:

I think you got it

Step-by-step explanation:

6 0
2 years ago
Divide £500 in a ratio of 3:7?
mafiozo [28]
First, you calculate the total amount of parts : 7 + 3 = 10
Next, divide the number by the total amount of parts : £500 ÷ 10 = £50
After that, you multiply the answer by the amount of parts needed on both sides of the ratio : £50 × 3 = £150 and £50 × 7 = £350
Finally put these answers back into the ratio : £150:£350

To check, make sure both sides of the ratio add up to the original number : £150 + £350 = £500
8 0
3 years ago
Can someone please tell me what (-8)^-2 is? Thanks!
nikdorinn [45]

<h2>(-8)^{-2}  = \frac{1}{64}</h2>

Step-by-step explanation:

(-8)^{-2} = (\frac{1}{-8} )^2  = \frac{1}{64} since (-8)^2= (-8)\times (-8) = 64

3 0
3 years ago
The ratio of red to blue marbles in a bag is 3:2.If there are 21 red marbles in the bag,how many blue marbles are in the bag
Aneli [31]

Answer:

14

Step-by-step explanation:

3*7=21

2*7=14

7 0
3 years ago
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