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3 years ago

Over which interval is the graph of fx =-x2 + 3x + 8 increasing

Mathematics

1 answer:

Semenov [28]3 years ago

8 0

Answer:

Step-by-step explanation:

it is increasing in $]-\infty;3/2]$

because this is like

$f(x)=ax^2+bx+c$

where a > 0

and -b/a=3/2

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The box plot shows the number of new vocabulary wores students learned last week. What

ArbitrLikvidat [17]

Answer:

15 percent

Step-by-step explanation:

4 0

3 years ago

Lula is buying meatballs for her beach theme party each package contains six beach balls generate the set of ordered pairs for t

andreev551 [17]

Answer:

{(1, 6), (2, 12), (3, 18), (4, 24)}

Step-by-step explanation:

We are given that ...

(packages, balls) = (1, 6)

Multiplying by 2, 3, and 4, we find the set of ordered pairs to be ...

{(1, 6), (2, 12), (3, 18), (4, 24)}

8 0

3 years ago

Jim sells used drones for 70% of the original manufacturer's purchase price of a new drone. Jim also sells new drones for 15% mo

adell [148]

The function for the amount saved if they purchase a used drone rather than a new drone from Jim's store is f(x) = 0.45x

He sells used drones at 70% of the price (x).

So, the selling price of a used drone is:

$\mathbf{Used = 70\% \times x}$

Express percentage as decimal

$\mathbf{Used = 0.7 \times x}$

$\mathbf{Used = 0.7x}$

Also, he sells new drones at 15% more of the price (x).

So, the selling price of a new drone is:

$\mathbf{New= (1 + 15\%) \times x}$

Express percentage as decimal

$\mathbf{New= (1 + 0.15) \times x}$

$\mathbf{New= 1.15 \times x}$

$\mathbf{New= 1.15x}$

The amount saved is the difference between the prices of the drones.

So, we have:

$\mathbf{Saved =New - Old}$

This gives

$\mathbf{Saved =1.15x- 0.7x}$

Subtract

$\mathbf{Saved =0.45x}$

Express as a function

$\mathbf{f(x) = 0.45x}$

Hence, the function for the amount saved is f(x) = 0.45x

Read more about proportions at:

brainly.com/question/13114933

7 0

2 years ago

A scientist has two solutions, which she has labeled Solutuion A and Solution B. Each contains salt. She knows that Solutuion A

ratelena [41]

a = amount (in oz) of solution A

b = amount of solution B

The scientist wants a mixture of 110 oz, so

a + b = 110

Solution A consists of 65% salt, so each ounce of solution A contributes 0.65 oz of salt; similarly, each ounce of B contributes 0.9 oz. The mixture is supposed to consist of 75% salt, which amounts to 0.75 * (110 oz) = 82.5 oz of salt. So

0.65 a + 0.9 b = 82.5

Solve for a and b:

b = 110 - a

0.65 a + 0.9 (110 - a) = 82.5

0.65 a + 99 - 0.9 a = 82.5

0.25 a = 16.5

a = 66 ==> b = 44

5 0

3 years ago

Evaluate 3 +(-4 ) -8-(-1).

xz_007 [3.2K]

The answer for 3+(-4)-8-(-1) is -8

5 0

3 years ago

Read 2 more answers