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mrs_skeptik [129]
3 years ago
10

Abdul wants to record songs that are each 6 minutes long. If he has 20 minutes of recording time, how many songs can Abdul recor

d?
A. 1
B. 3
C. 4
D. 6
Mathematics
1 answer:
vesna_86 [32]3 years ago
3 0

Answer:

3

Step-by-step explanation:

1=6

2=12

3=18

if she tried for a Forth it would be 24 minutes wich is over 20 minutes

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9.
e-lub [12.9K]

Answer:

a = 0.3 and b = - 1.1

Step-by-step explanation:

(x - 2)² = x² -4x + 4

Hence, x² - 4x + 4 = 3x - 6

x² - 7x + 10 = 0

(x - 5)(x - 2) = 0

∴ x = 5 or 2

f(5) = 25a + 5b = 2  ----- (i)

f(2) = 4a +  2b = -1  ------ (ii)

(i) X 2: 50a + 10b = 4 ----- (iii)

(ii) X 5: 20a + 10a = -5  ---- (iv)

Subtract (iv) from (iii): 30a = 9

a = 0.3

Substitute a into (ii) to obtain b

4(0.3) + 2b = -1

2b = -1 - 1.2 = -2.2

∴ b = -1.1

8 0
3 years ago
Help with #2 it has to do with number 1 that is the polygon you need to find the area of it.
Katena32 [7]
Okay, it's the equation to how find area any other way. A=L×W

This means *picture above*

So then you count over each line meaning 1.
This means L=9 and a 1/2. Since its in between the 2 an 3 on the x-axis.
Now for W or width. It equals 3 since you can count 2 lines and one either ends of the polygon is 1/2 each this creates one when added together.

All you do from there is multiply 9 and 3. This should give you A=area.

8 0
3 years ago
Help me out plsssssssssssssss
Kazeer [188]

Answer:

I would say C or D but im goin' with C

Step-by-step explanation:

I hope this helps.

5 0
3 years ago
Read 2 more answers
What is the directrix of the parabola defined by (x + 3)2 = -20(y − 1)?
Aleks [24]
We have that

(x + 3)² = -20(y − 1)
<span>This is actually the vertex form, so we can obtain the vertex already
</span>the vertex is the point (h,k)------------> (-3,1)

4p=-20------------> p=-5
Focus is at (-3,1-5)---------> (-3,-4)
Directrix is at <span>y = 1-(-5)----------> y=6
</span>
the answer is
the directrix is y=6

see the attached figure

4 0
3 years ago
A) Write a rule for a polynomial with left end up and right end up behavior, and has a y-
Novosadov [1.4K]

Answer:

y = x^2 + 3

Step-by-step explanation:

The equation I put has the left end up, the right end up, and has a y-intercept at (0,3).

If this answer is correct, please make me Brainliest!

7 0
3 years ago
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