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3 years ago

Which of the following are solutions to the quadratic equation below? Check all that apply x^2 +7x -8 =0

Mathematics

1 answer:

Rasek [7]3 years ago

3 0

Step-by-step explanation:

x² + 7x − 8 = 0

(x + 8) (x − 1) = 0

x = -8 or 1

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Which graph shows the solution to the following inequality? 4d-6<18

Nadusha1986 [10]

Answer: C

Step-by-step explanation:

4d - 6 < 18

+6 +6

4d < 24

$\frac{4d}{4} < \frac{24}{4}$

d < 6

Graph: ←----------------o 6

8 0

3 years ago

Read 2 more answers

A large high school offers AP Statistics and AP Calculus Among the seniors in this school 65% take AP Statistics, 45% take AP Ca

Igoryamba

Answer:

0.8

Step-by-step explanation:

P(AP statistics) = 65%

P(AP Calculus) = 45%

P(AP statistics n AP Calculus) = 30%

Probability of AP statistics or AP Calculus but not both :

Probability of event A or B :

P(AUB) = p(A) + p(B) - p(AnB)

P(AP statistics U AP Calculus) = P(AP statistics) + P(AP Calculus) - P(AP statistics n AP Calculus)

= 0.65 + 0.45 - 0.30

= 0.8

= 80%

4 0

2 years ago

Matt wants to investigate the opinions of young adults in the country, ages 18 years to 25 years, about time spent playing video

just olya [345]

Answer:

A simple random sample without replacement (SRSWOR) of the people of the country aged 18 to 25 years.

Step-by-step explanation:

Matt wants to investigate the opinions of young adults in the country, aged 18 years to 25 years about time spent playing video games. He plans to administer a survey to a sample of people. The following may be a suitable sample :-

A simple random sample without replacement (SRSWOR) of the people of the country aged 18 to 25 years.

5 0

3 years ago

In stage 2 of a rocket's takeoff, the speed of the rocket increases at a rate of 4.3% per minute. The speed of the rocket at the

Sveta_85 [38]

The correct option is: B. $25000=5000(1.043)^t$

Explanation

The general form of growth equation is: $A=P(1+r)^t$ , where A = final amount, P = initial amount, r = growth rate in decimal form and t = time duration

Here, the speed of the rocket at the beginning was 5,000 kilometers per hour and at the end will be 25,000 kilometers per hour. The speed increases at a rate of 4.3% per minute.

That means, $A= 25000 , P= 5000, r= 4.3\% = 0.043$

Now plugging these values into the above equation, we will get......

$25000=5000(1+0.043)^t\\ \\ 25000=5000(1.043)^t$

So, the equation that could be used to determine the time for the speed of the rocket to reach 25,000 kilometers per hour will be: $25000=5000(1.043)^t$

8 0

2 years ago

Read 2 more answers

Mr. Chang wants to retire in 10 years. He deposits $650.00 every three months into his retirement investment account. If the acc

Fittoniya [83]

Answer:

Mr. Chang will have 15714.90 dollars.

Step-by-step explanation:

p = 650

r = $7.8/4/100=0.0195$