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Anuta_ua [19.1K]
3 years ago
15

3. Evaluate the expression if a=3 and b=4. a) 2+ab = b) 3a-7= 3(a-b)=

Mathematics
1 answer:
olasank [31]3 years ago
3 0

Answer:

a=14

b=2

c=3

Step-by-step explanation:

a) 2+ab= 2+(3*4)

= 2+12

= 14

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Properties of exponents. the answer is 1/2^12 i need help with the work
Vikentia [17]

Step-by-step explanation:

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3 years ago
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Find two numbers whose sum is 55 and whose product is 646​
Svet_ta [14]

Answer:

17 and 38

Step-by-step explanation:

x + y = 55......x = 55 - y

x * y = 646

y(55 - y) = 646

55y - y^2 = 646

y^2 - 55y + 646 = 0

(y - 17)(y - 38) = 0

y - 17 = 0       y - 38 = 0

y = 17            y = 38

ur numbers are 17 and 38

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Solve the equation 0.6x + 2.7= 0.9x
xxTIMURxx [149]

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4 0
3 years ago
Find the shaded area of the figure. Please help would really appreciate it
Alisiya [41]
<h3>Answer:  120 square cm</h3>

==========================================================

Work Shown:

Let,

  • A = area of unshaded rectangle (the 6 by 10 rectangle)
  • B = area of the unshaded triangle (that has the "8 cm" inside it)
  • C = area of parallelogram
  • D = shaded area = C - (A+B) = C - A - B

We can see that A = 60 since the rectangle has base 10 and height 6, so 10*6 = 60.

The upper horizontal part of the parallelogram is 10+8 = 18 cm long. This means the bottom horizontal part of the parallelogram is the same length. The bottom portion shows 9 cm until we reach the triangle. This means that 18-9 = 9 cm is the base of the unshaded triangle (that has the "8 cm" inside it).

That triangle has area of 0.5*base*height = 0.5*9*8 = 36 square cm. So B = 36

The parallelogram has base 18 cm and height 12 cm, so it has area of 18*12 = 216. This means C = 216

We can then finally compute the value of D

D = C - A - B

D = 216 - 60 - 36

D = 120 square cm

6 0
3 years ago
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