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saveliy_v [14]
3 years ago
5

Alex bought 8 postcards in 4 days. At this rate, how many postcards would he have after 10 days?

Mathematics
2 answers:
yuradex [85]3 years ago
8 0

Answer:

20

Step-by-step explanation:

Nesterboy [21]3 years ago
7 0

Answer:

80

Step-by-step explanation:

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Determine whether the parabola y = −x2 + 15x + 8 opens up, down, left, or right.
spayn [35]
Dy/dx=-2x+15

d2y/dx2=-2

Since the acceleration is a constant negative it has an absolute maximum value for y(x), thus it opens downward, as x decreases without bound as x approaches ±∞
7 0
3 years ago
Please guys this is easy, I need help ASAP! (Giving brainliest)!
jasenka [17]

Answer:

4a. 13

4b. -4

Step-by-step explanation:

2x-6/5 = 4 (Muti each side by 5)

2x-6 = 20

2x = 26 (Divide each side by 2)

x = 13

7- 2x/4 = 9

-2x/4 = 2 (Muti each side by 4)

-2x = 8 (Divide each side by -2)

x = -4

5 0
3 years ago
Find an equation for the line that passes through the points (-5,-5) and (1,4)
Andreas93 [3]

The general line through (a,b) and (c,d) is

(c-a)(y-b)=(d-b)(x-a)

Here that's

(1 - - 5)(y - - 5) = (4 - -5)(x - - 5)

6(y+5)=9(x+5)

6y + 30 = 9x + 45

-15 = 9x - 6y

3x - 2y = -5

Answer: 3x - 2y = -5

We could put that in slope intercept form,

2y = 3x + 5

y = (3/2) x + 5/2

Answer: y = (3/2) x + 5/2

3 0
3 years ago
Please Assist!<br>What is the answer to this question???<br>​
Phoenix [80]

Answer:

(-5,\frac{1}{2}  )

Step-by-step explanation:

Midpoint Formula: (\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}  )

Simply plug in your coordinates into the midpoint formula to find midpoint:

R(-2, 3)

S(-8, -2)

(\frac{-2+-8}{2},\frac{3+-2}{2}  )

(\frac{-10}{2},\frac{1}{2}  )

(-5,\frac{1}{2}  )

3 0
3 years ago
PLEASE ANSWER FAST!!!
Ilya [14]
S= 11/12
15%-p=x
35-$18=n
5 0
4 years ago
Read 2 more answers
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