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son4ous [18]
2 years ago
7

What are the x-intercepts of the function f(x) = –2x^2 – 3x + 20?

Mathematics
1 answer:
Jet001 [13]2 years ago
5 0

Answer:

(5/2,0) and(-4,0)

Step-by-step explanation:

I hope this helps.

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What is the difference in time between crossing a bridge that is 2,737 meters long at an average speed of 322 meters per minute
egoroff_w [7]

so the bridge is 2737 meters long.

at a speed of 322 m/min, meaning for for every passing minute, there are 322 meters covered, so we can simply divide 2737/322 to get a "minute" amount, namely 8.5, at 322 m/min, it takes 8.5 minutes to cross it.

now, if we instead are going slower, at 80 m/min, 80 meters to a minute, then it'll be 2737/80 minutes, namely 34.2125.

their time difference is 34.2125 - 8.5  = 25.7125 minutes, so about 25 minutes and 43 seconds.

3 0
3 years ago
Danielle is making a quilt with triangles and squares. There are 4 colored triangles inside each square. The base and height of
enyata [817]

Answer:

(2x^2+16x+32)\ \text{sq. inches}

Step-by-step explanation:

b = h = Base = Height of triangle = (x+4)\ \text{inches}

Area of one triangle

A=\dfrac{1}{2}bh=\dfrac{1}{2}(x+4)(x+4)

There are 4 colored triangles so total area of the triangles is

4A=4\times \dfrac{1}{2}(x+4)(x+4)\\\Rightarrow 4A=2(x+4)^2\\\Rightarrow 4A=2(x^2+8x+16)\\\Rightarrow 4A=2x^2+16x+32

The area of the colored triangles is (2x^2+16x+32)\ \text{sq. inches}

8 0
3 years ago
a 6.5 ft tall car standing next to an adult elephant casts a 33.2 ft shadow, if the adult casts a shadow that is 51.5 ft long th
Ulleksa [173]
U beef ok come pick me out plz cool girl an sup Oscillator ya going ok come you went to go to the porterhouse with me please cool eight ok who need a mom
7 0
2 years ago
Which of the following is the closest to 15%? A. 1/7 B. 1/5 c. 1/4 d 1/3
Solnce55 [7]

Answer:

15%=0.15

1÷7=0.14

1÷5=0.2

1÷4=0.25

1÷3=0.33

Step-by-step explanation:

1/7

5 0
3 years ago
Read 2 more answers
NEED HELP ASAP!!
devlian [24]

Answer:we multiply by the reciprocal of a fraction when completing a division problem because it is a rule in mathematics that when you divide two fraction, you change the division sign to multiplication and flip the fraction at the right of the multiplication sign.

Step-by-step explanation:

For example if you have 4÷ 1/2. It basically means how many 1/2 can one get in 4. And the answers is 8.

Therefore multiplying by the reciprocal of a fraction when completing a division problem is a short cut method that has been tested and proven to be correct.

4 0
3 years ago
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