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Shkiper50 [21]
3 years ago
13

K · (3.2 ÷ 4) = 1.6 k =

Mathematics
1 answer:
SVEN [57.7K]3 years ago
3 0
K=2. You have to divide 3.2 by 4, then divide both sides by 0.8, finally, you have your answer, K=2.
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Draw a model, and write an equation to represent "4 times as many as 3 is 12." explain your work
Marina CMI [18]
I dont know the answer sorry am a biginner
7 0
3 years ago
Read 2 more answers
calculates the sum of the first 8 terms of an arithmetic progression starting with 3/5 and ending with 1/4
N76 [4]

We conclude that the sum of the first 8 terms of the arithmetic sequence is 17/5.

<h3>How to get the sum of the first 8 terms?</h3>

In an arithmetic sequence, the difference between any two consecutive terms is a constant.

Here we know that:

a_1 = 3/5\\a_8 = 1/4

There are 7 times the common difference between these two values, so if d is the common difference:

a_1 + 7*d = a_8\\\\3/5 + 7*d = 1/4\\\\7*d = 1/4 - 3/5 = (5 - 12)/20 = -7/20\\\\d = -1/20

Then the sum of the first 8 terms is given by:

3/5 + (3/5 - 1/20) + (3/5 - 2/20) + ... + (3/5 - 7/20)\\\\8*(3/5) - (1/20)*(1 + 2 + 3+ 4 + 5 + 6 + 7) = 3.4 = 34/10 = 17/5

So we conclude that the sum of the first 8 terms of the arithmetic sequence is 17/5.

If you want to learn more about arithmetic sequences:

brainly.com/question/6561461

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6 0
2 years ago
I'm sorry but what!? Can someone help?
tatiyna

Step-by-step explanation:

Axis of symmetry for quadratic ax² + bx² + c:

x = -b/2a.

Therefore for y = x² - 4x + 2,

-b/2a = -(-4)/2(1) = 2

The axis of symmetry is x = 2.

7 0
3 years ago
Read 2 more answers
You have 40 minutes to exercise at the gym, and you want to burn 300 calories total using both machines. How much time should yo
FromTheMoon [43]

Answer

8(40-y) + 6y =300

320 - 8y + 6y =300

-2y=-20

y=10

This leaves x to be 30.

You should spend 30 minutes on machine 1 and 10 minutes on machine 2.

Step-by-step explanation:

4 0
3 years ago
Solve each system of equations by substitution:<br> X + Y = 75<br> 10x + Y = 48
Nimfa-mama [501]

Answer:

X= -3;

Y=78

Step-by-step explanation:

A:       X+Y=75

B:       10X+Y=48

B-A:   (10X+Y)-(X+Y)=48-75

          10X+Y-X-Y= - 27

                       9X=-27

                         X= -3;

Now

A is :     -3+Y=75

                 Y=75+3=78

6 0
3 years ago
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