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3 years ago

Pls answer questions 1-3 with a proper answer

Mathematics

2 answers:

Drupady [299]3 years ago

6 0

Answer:

#1 is B

Step-by-step explanation:

I think this is correct because iv done that many times before

Vaselesa [24]3 years ago

4 0

Answer: 1. (a) is 50 cents, (b) is 75 cents, and (c) is 50 cents.

2. It weighed 2-3 (2 to 3) ounces.

3. If we're being honest, I forgot how to do this type problem but the other two I'm sure of.

Step-by-step explanation:

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Which of the following gives the correct intercept points and vertex point for the function ƒ(x) = x2 + 5x + 6?

Alex17521 [72]

Answer:

(-5/2,-1/4)

Step-by-step explanation:

7 0

3 years ago

Use the grouping method to factor 4x3 + 20x3 - 3x - 15

ivann1987 [24]

12+20•3-3x-15

multiply the numbers : 20•3 = 60

12+60-3x-15

group like terms

-3x+12+60-15

add and subtract the numbers : 12+60-15=57

final answer = -3x+57

3 0

4 years ago

The number T of teams that have participated in a robot-building competition for high-school students over a recent period of ti

Katarina [22]

Solving the quadratic equation, it is found that the number of teams is greater than 1000 after 3.1 years.

The number of teams after x years is given by:

$T(x) = 17.155x^2 + 193.68x + 235.81$

Initially, there are T(0) = 236 teams. If will 1000 be when T(x) = 1000, thus:

$17.155x^2 + 193.68x + 235.81 = 1000$

$17.155x^2 + 193.68x - 764.19 = 0$

Which has coefficients $a = 17.155, b = 193.68, c = -764.19$ , then:

$\Delta = (193.68)^2 - 4(17.155)(-764.19) = 89950.66$

$x_{1} = \frac{-193.68 + \sqrt{89950.66}}{2(17.155)} = 3.1$

$x_{2} = \frac{-193.68 - \sqrt{89950.66}}{2(17.155)} = -14.3$

We want the positive root, so the number of teams is greater than 1000 after 3.1 years.

A similar problem is given at brainly.com/question/10489198

8 0

2 years ago

If Arabella ran 7229 feet in 561 seconds how many mph did she run

Alexxx [7]

7229 feet = 1.369129 miles
561 seconds =0.155833 hours

She can run 1.369129 miles per 0.155833 hours

6 0

3 years ago

G(n)=-n^3+3n^2, find g(-4)

Sauron [17]

Answer:

g(-4) = 112

Step-by-step explanation:

Hi there!

$g(n)=-n^3+3n^2$

To find g(-4), replace all n's with -4:

$g(-4)=-(-4)^3+3(-4)^2\\g(-4)=-(-64)+3(16)\\g(-4)=64+48\\g(-4)=112$

I hope this helps!

5 0

3 years ago