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VARVARA [1.3K]
4 years ago
5

For a quadratic function ƒ(x)=ax2+bx+c, ƒ(−1)<1, ƒ(1)>−1, and ƒ(3)<−4. What could be the sign of a?

Mathematics
1 answer:
denis23 [38]4 years ago
4 0

Answer:

"a" must be negative

Step-by-step explanation:

The slope between points (-1, 1) and (1, -1) is a minimum of (-1-1)/(1-(-1)) = -1.

The slope between points (1, -1 and (3, -4) is a maximum of (-4-(-1))/(3-1) = -3/2.

Thus, as x increases, the slope is decreasing. In order for that to be the case, the value of <em>a</em> must satisfy a < 0.

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Show how to answer thanks
-BARSIC- [3]

9514 1404 393

Answer:

  • width: 4 ft
  • length: 13 ft

Step-by-step explanation:

Let w represent the width of the rectangle. Then the length is 3w+1 and the area is ...

  w(3w+1) = 52

  3w²  +w -52 = 0

To factor this equation, we need factors of 3·52 = 156 that have a difference of 1. These values are 12 and 13, so we can rewrite the equation as ...

  3w² +13w -12w -52 = 0

  w(3w +13) -4(3w +13) = 0

  (w -4)(3w +13) = 0

The positive value of w that makes a factor zero is ...

  w = 4

Then the length is 3w+1 = 3(4) +1 = 13.

The length is 13 ft; the width is 4 ft.

8 0
3 years ago
While taking a ride in a hot-air balloon in Napa Valley, Francisco wonders how high he is. To find out, he chooses a landmark th
mihalych1998 [28]

 

The solution would be like this for this specific problem:

sin 54 degrees = Height/718.0624

Height = (sin 54 degrees)(718.0624) = 580.9 ft

So the height of the balloon is 580.9 ft. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

8 0
3 years ago
Read 2 more answers
Dots sells T-shirts ($5) and shorts ($8). In April, total sales were $560. People bought 4 times as many T-shirts as shorts.
iogann1982 [59]

Answer:

Number of T-shirts sold = 80 and number of shorts sold = 20

Step-by-step explanation:

This question is incomplete. If we have to calculate the number of shirts and T-shirts sold by Dots then we will calculate this question as below.

Let the number of shorts sold = s

And the number of T-shirts sold = T

Dots sells T-shirts at $5 and shots at $8 in April.

Equation for this situation will be,

5T + 8s = 560 -----(1)

Number of T-shirts sold are 4 times the shorts,

T = 4s ----- (2)

By substituting the value of T from equation (2) in equation (1),

5(4s) + 8s = 560

20s + 8s = 560

28s = 560

s = 20

From equation (2),

T = 4(20)

T = 80

Number of T-shirts sold = 80 and number of shorts sold = 20

6 0
3 years ago
What is the results of 4/5 × 2/3 ?​
Alinara [238K]

Answer:

8/15 or 0.53333...

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
#7 please help!!!!!!!!!!!!!!!!!!!!!!!!!
Ira Lisetskai [31]
If they all painted at the same rate the equation is this 

mothers 8
daughters 12  at 220 sq ft


mothers 6
daughters 8 at 152 sq ft

220 +152 =372 divided by 34 (because they all painted at the same rate)=10.94 sq ft they each painted
4 0
3 years ago
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