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AlladinOne [14]
3 years ago
8

Plzz Help me!!!!!!!

Mathematics
2 answers:
aleksklad [387]3 years ago
8 0
D. 141 inches i’m pretty sure
motikmotik3 years ago
7 0

Answer:

I believe it’s A.21

Step-by-step explanation:

HOPE THIS HELPS YOU

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Solve 7w – 3r = 15 for r. Show your work.
uysha [10]
What's w?

Well without W, we just have to trial and error.

R could be 2.

   7w - 3r = 15
7w - 3(2) = 15
     7w - 6 = 15
          7w = 21
           /7     /7
            w = 3

So if W = 3, R could be 2.
5 0
3 years ago
Read 2 more answers
I really need help with this.<br><br> Please and thank you.
trasher [3.6K]

Answer:

Step-by-step explanation:

5 0
2 years ago
If 7x - 11 = 17, then x = 4
lyudmila [28]
It is C. In option C, it tells you that x=4. All you have to do is fill in the blanks.

7 • 4 - 11 = 17
28 - 11 = 17
17 = 17

The statement is true. 17 does equal 17, so the answer is C.
6 0
3 years ago
Find Dxy using the rules for finding derivatives.<br> =(5x^2−8)(9x^2−3x+5)
kirza4 [7]
You can do foil method first, to make it easier and to avoid product rule,
y= 45x^4 - 15x³ + 25x² - 72x² + 24x - 40
Simplify like terms,
y= 45x^4 - 15x³ - 47x² + 24x - 40
Now, find derivative,
dy/dx  = 180x³ - 45x² - 94x + 24 

4 0
3 years ago
The base of an isosceles triangle is one and a half times the length of the other two sides.A smaller triangle has a perimeter t
Anna11 [10]

Answer:

Perimeter of the smaller triangle = 1.75x

Step-by-step explanation:

Let the two equal sides of an isosceles triangle = x

Therefore, length of the base = (1\frac{1}{2})x

Perimeter of this isosceles triangle = x + x + (1\frac{1}{2})x

                                                          = 2x + (1+\frac{1}{2})x

                                                          = 2x + x + \frac{x}{2}

                                                          = \frac{5x}{2}

Since, smaller triangle has a perimeter that is half the perimeter of the larger triangle,

Length of each corresponding side of smaller triangle will be half of the larger triangle.

Length of sides of the smaller triangle = \frac{x}{2},\frac{x}{2},(1\frac{1}{2})\frac{x}{2}

Perimeter of the smaller triangle = \frac{x}{2}+\frac{x}{2}+(1\frac{1}{2})\frac{x}{2}

                                                      = x + \frac{x}{2}+\frac{x}{4}

                                                      = \frac{3}{2}x+\frac{x}{4}

                                                      = \frac{6}{4}x+\frac{x}{4}

                                                      = \frac{7}{4}x

                                                      = 1.75x

Therefore, expression that represents the perimeter of the smaller triangle is (1.75x)        

4 0
3 years ago
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