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Nimfa-mama [501]
3 years ago
5

Please help me..

Mathematics
1 answer:
Sonja [21]3 years ago
3 0
Answer:
The last one, 4
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Which expression is the multiplicative inverse of -21?
alexdok [17]

Answer:

21

Step-by-step explanation:

inverse means opposite so it's a positive

8 0
4 years ago
I need step by step help with: 3x^1/3 + 2x^2/3 =5
Luba_88 [7]
If you write y=x^{1/3}, you'll notice this is really just a quadratic equation that can be factorized:

2x^{2/3}+3x^{1/3}-5=0\iff 2y^2+3y-5=0\iff (2y+5)(y-1)=0\iff(2x^{1/3}+5)(x^{1/3}-1)=0

So you have

2x^{1/3}+5=0\implies 2x^{1/3}=-5\implies x^{1/3}=-\dfrac52\implies x=-\dfrac{125}8

and

x^{1/3}-1=0\implies x^{1/3}=1\implies x=1
5 0
3 years ago
Please answer this correctly
12345 [234]

Answer:

21.66

20.545

20.479

20.15

20.1

4 0
3 years ago
Read 2 more answers
Find the length of the third side. If necessary, round your the nearest tenth.
Ksivusya [100]

Answer:

24

Step-by-step explanation:

Use Pythagorean theorem,

base² + altitude² = hypotenuse²

7² + altitude²  = 25²

      altitude²  = 25² - 7²

                       = 625 - 49

                       = 576

altitude = √576

altitude = 24

3 0
3 years ago
Round each measurement to the nearest ten. Then estimate the area of the rectangle.
Ainat [17]

Answer:

4000 sq inches

Step-by-step explanation:

A rectangle is given with sides 82 and 46 inches

We have to round off these dimensions to the nearest 10.

82 inches ~80 inches since 2 <5, we make it 0

Similarly 46 inches ~50 inches since 6>5

Now area

= length x width

=80(50)

=4000 square inches

Option 2 4000 sq inches is correct answer.

8 0
4 years ago
Read 2 more answers
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