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kicyunya [14]
3 years ago
7

Evaluate the expression 5k2 - 7k when k = 3

Mathematics
2 answers:
VikaD [51]3 years ago
4 0

Answer:

24

Step-by-step explanation:

In this question, you have to solve by plugging in the value to the "k" variable and solve.

Solve:

5(3)^2 - 7(3)

3^2 = 9

5(9) - 7(3)

45 - 7(3)

45 - 21 = 24

Your final answer would be 24.

makkiz [27]3 years ago
4 0

Answer:

24

Step-by-step explanation:

5(3)^2 - 7(3)

5(9) - 21

45 - 21

24

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Find the value of the expression 3m^2+2p^2-15 when m =3 and p = 10
mylen [45]

3m {}^{2}  +  {2p}^{2}  - 15
m = 3
p = 10

3 \times 3 {}^{2}  + 2 \times  {10}^{2}  - 15 =
3 \times 9 + 2 \times 100 - 15 =
27 + 200 - 15 =
212

Hence, the answer is 212.



5 0
4 years ago
What is the equation of this line in slope-intercept form?
12345 [234]

Answer:

y = -2x + 5

Step-by-step explanation:

Slope-intercept form: y = mx + b

The slope of the line, m, is -2 because the line shows a negative trend and moves right 1 unit every time a point moves down 2 units.

The y-intercept, b, is 5 because the line crosses that number once on the y-axis.

7 0
2 years ago
1) Jessica charges $8 an hour for babysitting
nordsb [41]
A. The independent variable is time, as time is manipulating the value of her salary.

b. The dependent variable is her cost because what she charges for babysitting depends on how long she works.

c. y = 8x
y = how much she charges for this job
8 = the amount she charges per hour
x = number of hours babysat
6 0
3 years ago
Im having trouble figuring out what this question means |7| + -4=?
OverLord2011 [107]

Answer:

3

Step-by-step explanation:

It means absolute value 7 plus -4

This means that if it were a -7, it would become positive because it is under absolute value bars...since it is positive nothing changes

7-4= 3

7 0
3 years ago
I don’t understand please help?
Lerok [7]

Answer:

D

Step-by-step explanation:

Cuz sqr root of 20 = 2 sqrt 5, -2 sqrt 5

7 0
3 years ago
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