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3 years ago

Can someone help me do this I'm not good at this kind of math

Mathematics

1 answer:

Finger [1]3 years ago

5 0

hope this helps i did this instead of my ap psych work haha

i didnt rlly check my answers so i hope this are correct <3

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What are the solutions of x²-4x+5=0?<br><br>

iragen [17]

Answer:

x=2+i, x=2-i

Step-by-step explanation:

x^2-4x+5=0

Apply the quadratic formula.

4 0

3 years ago

A certain car can travel on a highway for 350 miles on 15 gallons of gas and in a city for 280 miles on 18 gallons of gas. If th

user100 [1]

Answer:

The car's average 18 number of miles per gallon

Step-by-step explanation:

The car has different efficiencies depending if its used on highway or city streets.

The efficiency on a highway is:

$E_h=\dfrac{350}{15}\;\text{miles/gal}=23.33\;\text{miles/gal}$

The efficiency for city driving is:

$E_c=\dfrac{280}{18}\;\text{miles/gal}=15.56\;\text{miles/gal}$

We now that the car uses twice as many gallons for city driving as for highway driving. This means that, for every gallon consumed, 2/3 are for city driving and 1/3 are for highway driving.

Then, we can calculate how many miles makes the car on average as:

$E=\dfrac{1}{3}E_h+\dfrac{2}{3}E_c\\\\\\E=\dfrac{1}{3}\cdot 23.33+\dfrac{2}{3}\cdot15.56=7.78+10.37=18.15\;\text{miles/gal}$

3 0

2 years ago

List two numbers that are divisible by 9?

atroni [7]

Answer:

3, 6, 12, 15

Step-by-step explanation:

3/12= 4

3/9= 3

7 0

2 years ago

A curve along a highway is to be designed for cars moving at 100 kilometers per hour. Find the angle of banking if the radius of

statuscvo [17]

Answer:

hope this will help you

Step-by-step explanation:

.........

5 0

3 years ago

50 POINTS!!!!

tatiyna

Answer:

90 cubic inches

Step-by-step explanation:

V = 1/3 · area of base · height

V = 1/3 · 18 · 15

V = 6 · 15

V = 90

6 0

3 years ago