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Evgen [1.6K]
2 years ago
14

A picture is 2” x 1.5”. Scale is 1:40cm. What are dimensions of original painting

Mathematics
1 answer:
Ann [662]2 years ago
4 0
2*1.4=2.8
1.5*1.4= 2.1
New figure: 2.8 by 2.1
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Which of the following is the correct factorization of -y²+y+6?
SpyIntel [72]

Answer:

<h2>(−y−2)(y−3)</h2>

Step-by-step explanation:

I'm just going to factor it for you.

Factor −y^2+y+6

−y^2+y+6

=(−y−2)(y−3)

Answer:

(−y−2)(y−3)

6 0
2 years ago
Evaluate the expression for x = 5, y = 3, and z = 14 . 5x−6y+20z over 4yz Enter your answer in the box.
spin [16.1K]

Hello from  MrBillDoesMath!


Answer:   1 17/24


Steps:

          Evaluate             (5x-6y+20x)/ 4yz when x = 5, y = 3, z = 14


          (5(5) - 6(3) + 20(14))   / 4 (3)(14)          (Substitute in values)

       = (25   - 18    +280)       / 4 (3) (14)         (Evaluate products)

       =  (287) /  4 (3) (14)                                (Evaluate expressions)

      =  287/ 168                                             (4 (3)(14) = 168)

      =  (168  + 119 ) /168                                 287 = 168  + 119

      = (168)/168 + 119/168

      = 1              + 119/168

      = 1  119/168          

       BUT 119 = 17 * 7  (surprise!)  and 168 = 12 * 7 * 2 so answer

    =  1 (17*7)/(12*7*2)

    =  1 (17)/(12*2)                               (Cancel 7's)

    = 1 (17/24)                                    


Regards, MrB    


3 0
3 years ago
How do you subtract rational expressions without a common denominator?
zubka84 [21]
You would have to make common denominators
consider a/b,c/d in Q
then a/b - c/d = ad/db - cb/bd = (ad-cb)/db for all a,b,c,d in R, exclude b,d=0
i.e. 1/2 - 1/4
=4/8 - 2/8 =(4-2)/8=2/8 =1/4
4 0
3 years ago
2. How many students are there in Katy's study?<br> Write your answer in the space below.
RoseWind [281]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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Stells [14]
9.60 times 10 squared is the answer
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