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3 years ago

Evaluate the function f(x) = –2x2 – 3x + 5 for the input value –3.

Mathematics

1 answer:

Elza [17]3 years ago

3 0

Answer:

Step-by-step explanation:

-2*2-3x+5=f(x)

-2*2-3(-3)+5=f(x)

-4+9+5=f(x)

5+5=f(x)

10=f(x)

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One day at St. Philip's High School, 1/2 of the pupils walked to school, 1/5 of the pupils came to school by bus, and the remai

Doss [256]

Let P be the number of kids,
we know P>57
take 1-(1/2)-(1/5)=3/10
therefore 57 is 3/10P
3/7P=57
P=57*7/3=133 is the answer
it would be incorrect if we didnt get a positive integer.

7 0

4 years ago

3. Alice took out a simple interest loan to purchase carpet for her house. The interest on the loan

hjlf

Answer:

The price of the carpet was $\$3,697.20$

Step-by-step explanation:

we know that

The simple interest formula is equal to

$I=P(rt)$

where

I is the Final Interest Value

P is the Price of the carpet

r is the rate of interest

t is Number of Time Periods

in this problem we have

$t=3\ years\\ P=\$?\\ I=\$1,081.43\\r=0.0975$

substitute in the formula above

$1,081.43=P(0.0975*3)$

$1,081.43=P(0.2925)$

Solve for P

$P=1,081.43/(0.2925)$

$P=\$3,697.20$

4 0

3 years ago

Evaluate 1/2t + 3/8 when t = 1/4

bazaltina [42]

The answer is 7/8ths

6 0

4 years ago

At the market, 5 light bulbs cost $9. How much do 7 light bulbs cost?

Rudiy27

Hello!

To solve this, find the cost of a single light bulb first, by dividing 9 / 5.

9 / 5 ==> 1.80

One light bulb is $1.80

Now, multiply 1.80 by 7.

1.80 * 7 = 12.6

7 light bulbs cost $12.6

Hope this helps! ☺♥

6 0

4 years ago

Read 2 more answers

How do you do solve this problem

Damm [24]

Answer:

Step-by-step explanation:

1cm = 10mm

Therefore 8cm = 8 · 10mm = 80mm

The scale of the model

$\dfrac{model}{real}\to\dfrac{80}{0.43}=\dfrac{80\cdot100}{0.43\cdot100}=\dfrac{8000}{43}\approx186$

8 0

3 years ago