2 years ago

What is the answer to part a and b??? please help

Mathematics

1 answer:

lozanna [386]2 years ago

7 0

Dan is taller because 5/2= 1 1/2 and 1 1/2= 1 2/4.

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Orlov [11]

I have no idea what this means im in 6th grade

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3 years ago

What are the solutions of the quadratic equation (x + 3)(x +3) = 49? Ax = -2 and x = -16 Bx = 2 and x = -10 Cx = 4 and x = -10 D

Ivahew [28]

Answer:

4 and -10

Step-by-step explanation:

$\displaystyle (x + 3)(x +3) = 49 \\ x^2+3x+3x+9=49 \\ x^2 +6x+9=49 \\ x^2 + 6x + 9 - 49 = 0 \\x^2+6x-40=0 \\\\ \Delta=b^2-4ac \\ \Delta=6^2-4 \cdot 1 \cdot (-40) \\ \Delta=36+160 \\ \Delta=196 \\ \\ X_{1,2}=\frac{-b \pm \sqrt{\Delta} }{2a} \\ \\ X_1=\frac{-b+\sqrt{\Delta} }{2a} = \frac{-6+14}{2} = \frac{8}{2}=4 \\ \\ X_2=\frac{-b-\sqrt{\Delta} }{2a} = \frac{-6-14}{2}=\frac{-20}{2} = -10$

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3 years ago

1/3 is greater than what other fractions

Novosadov [1.4K]

As 1/3 = 2/6 = 3/9 = 4/12

and 2/6 is greater than 1/6
3/9 is greater than 2/9
etc..

So

1/3 is greater than 1/6 ; 2/9 ; ...

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3 years ago

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How many significant digits are there in the product of 0.005 and 25.725

Furkat [3]

A is the correct answe

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3 years ago

Select one of the factors of 5x2 + 7x + 2. a. (5x − 2) b. (x + 2) c. (5x + 1) d. None of the above

Elan Coil [88]

$5x^{2}+7x+2=5x^{2}+5x+2x+2=5x(x+1)+2(x+1)= \\ \\ (5x+2)(x+1)$

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3 years ago

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