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Iteru [2.4K]
3 years ago
11

F (x) = 3x² - 4x Find f (-1)

Mathematics
1 answer:
abruzzese [7]3 years ago
3 0

Step-by-step explanation:

f(-1)=3×(-1)²-4×(-1)

=3×1-4×(-1)

=3+4

=7

hope it helps.

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May you someone help me It's my last question!​
Orlov [11]

Answer:

-19. Cant be -6 as its to the right. the others are positive.

3 0
3 years ago
Heather left the hospital and drove toward the desert at an average speed of 35 km/h. Danielle left sometime later driving in th
elena55 [62]

Answer:

Danielle drove 3 hours

Step-by-step explanation:

Suppose Heather moved in the x direction.

Then Danielle moved in the opposite direction, that is, she moved in the -x direction.

Let's call V_1, x_1, t_1 at the speed, distance and time that I code Heather

Let's call V_2, x_2, t_2 at the speed, distance and time Danielle codes.

Observe the following diagram:

(x) Heather <------ x_1 --------- hospital ---------- x_2 -----------> Danielle (-x)

So:

V_1 = 35\ km/h

t_1 = 4\ h

V_2 = 50\ km/h

We know that after 4 hours the distance between Heather and Danielle was 290 km.

That is to say:

x_2 + x_1 = 290\ km/h

We know that x_1= v_1t_1

x_1 = 35(4)

x_1 = 140\ km

We already know x_1, the distance from the hospital to Heather, so we can find x_2 and thus know t_2

So:

x_2 = 290 - 140\\\\x_2 = 150\ km

Then:

t_2 = \frac{x_2}{v_2}\\\\t_2 = \frac{150}{50}\\\\t_2 = 3\ h

7 0
3 years ago
It's due todayyyyyyy (;ŏ﹏ŏ)​
Thepotemich [5.8K]
The correct answer are

Sue interest : 169.6061952

Bill interest: 189.9131472


B. Bill will get more interest then sue


Explain


Sue principal balance p= 2300

Interest for 3 years so t= 3

Interest is compounded yearly n= 1

R= 2.4%

A= 2300(1+2.4/100)^3 = 2300(1+0.024)^3 = 2300 x (1.024)^3 = 2469.6061952

Interest for 3 year is A-p= 2469.6061952 -2300

169.6061952





Bill principle p= 1800

Interest for 3 years t= 3

Interest compounded so n= 1

R= 3.4%


A= 1800(1+3.4/100)^3 = 1800 (1+0.034)^3 = 1800 (1.034)^3 = 1989.9131472

Interest in 3 yrs = 1989.9131472 - 1800 =

189.9131472



For B is below

Hopefully this help you :D

3 0
3 years ago
The length of a rectangle is 8 more than twice it’s width. The perimeter is 96 feet. Find the dimensions of the rectangle
dalvyx [7]

Answer:

width is 12 feet. Length is 32 feet.

Step-by-step explanation:

5 0
3 years ago
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