3 years ago

I NEED ALGEBRA HELP!!!

Mathematics

1 answer:

abruzzese [7]3 years ago

3 0

Okay, what's the question?

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Can someone help me please

8_murik_8 [283]

Answer:

$2x^2+4x+2$

Step-by-step explanation:

$(f \circ g)(x)=f(g(x)) \\ \\ =f(x+1) \\ \\ =2(x+1)^2 \\ \\ =2(x^2+2x+1) \\ \\ =2x^2+4x+2$

8 0

1 year ago

Read 2 more answers

Sandra normally takes 2 hours to drive from her house to her grandparents' house driving her usual speed. However, on one partic

Rudiy27

Answer:

Her usual driving speed is 38 miles per hour.

Step-by-step explanation:

We know that:

$s = \frac{d}{t}$

In which s is the speed, in miles per hour, d is the distance, in miles, and t is the time, in hours.

We have that:

At speed s, she takes two hours to drive. So

$s = \frac{d}{2}$

$d = 2s$

However, on one particular trip, after 40% of the drive, she had to reduce her speed by 30 miles per hour, driving at this slower speed for the rest of the trip. This particular trip took her 228 minutes.

228 minutes is 3.8 hours. So

$0.4s + 0.6(s - 30) = \frac{d}{3.8}$

$3.8(0.4s + 0.6s - 18) = d$

$3.8s - 68.4 = 2s$

$1.8s = 68.4$

$s = 38$

Her usual driving speed is 38 miles per hour.

3 0

3 years ago

in a survey of eight graders, 4/5 of the students preferred using pens over pencils. what percent of the students preferred?

Natali5045456 [20]

Answer:

80% (you divide 4 by 5 to get 0.8, then you move the decimal 2 spaces to the right

6 0

3 years ago

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Evaluate 1/6 + 2/3 PLEASEEEEEE HELP

mart [117]

2/3 = 4/6.

1/6 + 4/6 = 5/6.

The answer is 5/6.

7 0

3 years ago

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A student's course grade is based on one midterm that counts as 20% of his final grade, one class project that counts as 5%

Ludmilka [50]

Answer:

Step-by-step explanation:

The weighted average of the student's scores is ...

0.20×63 +0.05×97 +0.35×85 +0.40×77 = 78

The student's overall final score is 78.

The letter grade earned is between 70 and 80, so is a C.

4 0

3 years ago