3 years ago

#6

Mathematics

2 answers:

Kay [80]3 years ago

7 0

Answer:

B. 7.k+7.3-18

Step-by-step explanation:

Distributive Property,

7 (k+3) = 7 x k + 7x 3

Ivan3 years ago

5 0

B. 7.k+7.3 - 18 ......

You might be interested in

How do I put this rational expression in simplest form? Steps please!!!!

Cloud [144]

4.
b^-2-x^-2/b^-1+x^-1

b^-2/b^-1=b^-1
x^-2/x^-1=x^-1
As a result, the simplest form is:
b^-1-x^-1. Hope it help!

8 0

3 years ago

Read 2 more answers

Alex is a member of the school track and field team. His times for running various distances are shown. Create a scatter plot fo

frozen [14]

Answer:

(1) Please find attached the graph of the data

(2) 160.396 m

(3) The correlation that exist is a straight line correlation

Step-by-step explanation:

The given data are;

Distance, Time

(m), (s)

50, 6.1

100, 12

150, 18.3

200, 25.2

250, 31.7

(2)

Based on the linear regression formula, we have;

$b = \dfrac{N\sum XY - \left (\sum X \right )\left (\sum Y \right )}{N\sum X^{2} - \left (\sum X \right )^{2}}$

$b = \dfrac{5 \times 17215 - 93.3 \times 750}{5 \times 2156.03 -8704.89} = 7.758$

$a = \dfrac{\sum Y - b\sum X}{N}$

$a = \dfrac{750 - 7.7581 \times 93.3}{5}= 5.234$

The line is

y = 7.7581×x+5.234

When t = 20 s, we have

y = 7.7581*20+5.234 = 160.396 m

(3) The correlation that exist is a straight line correlation

3 0

3 years ago

A packet of crisps contains 50g. If a “new size” packets contain 15% more, how many grams of crisps are in the “new size” packet

Agata [3.3K]

To solve this, you’d multiply 50 by 1.15 to get 57.5 grams of crisps.

4 0

3 years ago

You are playing a card game with red and black cards where the red cards (r) are worth five points and the black cards (b) are w

garik1379 [7]

Trial and error but that will take time so there is a formula for it hope this helps

4 0

3 years ago

Read 2 more answers

PLEASE HELP!!! SHOW WORK PLEASE!! LAST QUESTION!!!!! PLEASE

Allushta [10]

Answer:

133

Step-by-step explanation:

its an obtuse angle

5 0

3 years ago