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Alex777 [14]
3 years ago
14

(50 POINTS) Express each sum using summation notation.

Mathematics
1 answer:
vesna_86 [32]3 years ago
4 0

14: a

1

=

39

/2                              0.25               313%        16%

15:     54

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Evaluate the expression 8x2+9y
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Answer:

34676

Step-by-step explanation:

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3 years ago
What 1,045 to the nearest thousands
faltersainse [42]

1,045 to the nearest thousands would be <u>1,000</u> because you must round down since there are no numbers close enough to round up.

8 0
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Read 2 more answers
f(x)=(2x−1)(3x+5)(x+1) has zeros at x= -5/3, x= -1 and x= 1/2 What is the sign of f on the interval -5/3
Crazy boy [7]

The sign of f on the interval -5/3 is negative

<h3>How to determine the sign?</h3>

The function is given as:

f(x)=(2x−1)(3x+5)(x+1)

The zeros of the function are

x= -5/3, x= -1 and x= 1/2

Next, we plot the graph of the function

At x = -5/3, the function approaches negative infinity

This means that the sign of f on the interval -5/3 is negative

Read more about function intervals at:

brainly.com/question/27831985

#SPJ1

6 0
2 years ago
Two-thirds of the sum of a number squared and 5 is fourteen
RideAnS [48]

Answer:

2/3( x^2 + 5 ) = 14 or 2/3x^2 - 32/3

Step-by-step explanation:

Part 1:

Two-thirds ( 2/3 )

of the ( (---) )

sum ( + )

of a number squared ( x^2 ) and 5 ( + 5 )

is fourteen ( = 14 )

Part 2 (Not super confident about):

2/3( x^2 + 5 ) = 14

2/3x^2 + 10/3 = 14

2/3x^2 - 32/3

Hopefully this helps!

Brainliest please?

7 0
3 years ago
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Let x = speed and y = distance

y = x * 45

y = (x - 4) * 70

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x = 11.2

Put it back into the first equation:

y = 11.2 x 45

y = 504miles

Hope this helps! Any questions let me know :)
7 0
3 years ago
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