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Alja [10]
4 years ago
14

What did you get for the answer and how to solve -7(k-3)

Mathematics
2 answers:
ss7ja [257]4 years ago
6 0

Answer:

The answer is -7k + 21

Could I please have brainliest?

Step-by-step explanation:

Distribute -7k - (-21)

simplify 7 x -3 to -21

simplify brackets

-7k + 21


Alinara [238K]4 years ago
5 0

Answer:


Step-by-step explanation:

-7k+21

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Please answer all of them I will mark brainlist
ivolga24 [154]

Answer:

C

Step-by-step explanation:

5 0
3 years ago
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Find two consecutive positive intergers such that the square of the smaller interger is nineteen more than five times the larger
Naddika [18.5K]

Answer:

8 and 9

Step-by-step explanation:

Let the two consecutive integers be x - 1 and x

Smaller = x-1

Largere = x

If the square of the smaller integer is nineteen more than five times the larger integer, then;

(x-1)² = 19 + 5x

Expand

x²-2x+1= 19+5x

x²-2x-5x+1-19 -0

x²-7x-18 =0

Factorize

x²-9x+2x-18 =0

x(x-9)+2(x-9) = 0

(x+2) = 0 and x - 9 = 0

x = -2 and 9

SInce x cannot be negative;

x = 9

Smaller number = 9-1

Smaller number = 8

Hence the two consecutive integers are 8 and 9

6 0
3 years ago
Which equation represents the line of BEST fit for the data?
Sladkaya [172]

Equation that fits best in data is y = -30x + 4 .Although there are no options , kindly match this equation to options available!

<u>Step-by-step explanation:</u>

We are given a graph with y & x-axis , with 4 points given and best fit for data can be found out by joining points  . On joining points , we see that best fit is a line . General equation of a line is : y = mx + c ,

where m = slope of line & c = intercept.

Let's calculate slope m :

Consider any two given points , let's have ( 4,0) & (3,30) :

Slope = m

⇒ m = \frac{y_2-y_1}{x_2-x_1}

⇒ m = \frac{0-30}{4-3}

⇒ m = -30

So , equation now becomes : y = mx + c

⇒ y = -30x + c

at x = 0 we have y = 4

y = -30x + c

4 = -30(0) + c

c = 4

Therefore, equation that fits best in data is y = -30x + 4 .Although there are no options , kindly match this equation to options available!

6 0
3 years ago
A culture started with 1,000 bacteria. After 6
Naddik [55]

Answer:

1350

Step-by-step explanation:

1000 to 1100 is an increase of 100 bacteria per 6 hours

100/6 = 16.67 bacteria per hour

16.67 * 15 hours = 250

Total bacteria should be 1100+250= 1350

hope this helps :D

3 0
3 years ago
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Stacy and Katie plan to walk the 27-mile scenic route across Malibu, starting at opposite ends of the route at the same time. If
enot [183]

Answer:

Stacy = 15 mile

Step-by-step explanation:

view attached

5 0
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