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Sonja [21]
3 years ago
15

Can someone please help me with these problems?

Mathematics
2 answers:
adoni [48]3 years ago
5 0
17. The student did the exponent operation first. 3^2=9. The student is correct.
18. The student made a mistake in the second step by subtrating, when he was supposed to multiply 8×2.
19. Correct asnwer is 16:
23-8×2+3^2=
=23-8×2+9=
=23-16+9=
=7+9=
=16
anzhelika [568]3 years ago
4 0
17. Subtraction. According to the order of operations, he should've done the exponent of 3 first.

18. He then did 15×2. According to the order of operations, he should've done the multiplication of 8×2, since, if there are only multiplication and/or division left, you work left to right. He isn't correct.

19. 16, I think, I did it in my head.
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Jack has a rectangle garden that measures 4 feet wide by 3 feet long he wants to increase the area to 56 feet
olga nikolaevna [1]

Answer:

then you would have as length or width 8 by 7 feet, or any other factors of 56 as the width or length. Since you want to increase the area.

8 0
3 years ago
Read 2 more answers
4. Stella says the equation x^2−8x+y^2+2y=5 has a center of (4,−1) and a radius of 5. Is she correct? Why or why not?
Ostrovityanka [42]
<h2>Stella is correct about center and wrong about radius      </h2>

Step-by-step explanation:

Equation of circle with (h,k) as center and radius r is given by,

          (x-h)²+(y-k)² = r²

Here equation is

          x²−8x+y²+2y=5

Changing in to (x-h)²+(y-k)² = r² form

           x²−8x + 16 - 16 +y²+2y+1 - 1=5  

           (x-4)² - 16 + (y+1)² -1 = 5

           (x-4)²  + (y+1)²  = 22

           (x-4)²  + (y+1)²  = 4.69²

           Center is (4,-1) and radius is 4.69

Stella is correct about center and wrong about radius            

8 0
2 years ago
Write down a fraction whose value lies between 3 and 4; whose denominator is a multiple of 5; whose numerator is a multiple of 1
slamgirl [31]

Answer:

  33/10 and 55/15

Step-by-step explanation:

Possible denominators that are multiples of 5 less than 17 are 5, 10, 15.

Corresponding numerator ranges are [15, 20], [30, 40], and [45, 60]. In only two of these ranges are there any multiples of 11.

  33 in [30, 40]

  55 in [45, 60]

So, there are only two possible fractions meeting your requirement:

  33/10 and 55/15

6 0
3 years ago
Find the surface area! Please I need it quick
zloy xaker [14]

Step-by-step explanation:

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<h3>Area1=4.8*2.1</h3><h3> =10.08 m²</h3><h3>Area2=4.8*1.4=6.72m²</h3><h3>Area3=4.8*2.3=11.05m²</h3><h3>Area4=4.8*1.9=9.12m²</h3>

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<h2>Sorry my wireless went down!!!</h2><h2>Hope this helps and you already know what I would like to get</h2>

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2 years ago
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never [62]
A graph with y = 2x + 1 is an example of one
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