All categories

3 years ago

( (−7.2) 2 − 6.4 ) × (1.8 + (−0.8))

Mathematics

2 answers:

Kipish [7]3 years ago

4 0

Answer:

I dont know what you want me to do. But if you wanted it simpilfied its

−20.8.

Step-by-step explanation:

slavikrds [6]3 years ago

3 0

Answer:

-20.8

Step-by-step explanation:

( (-7.2)2 - 6.4) × (1.8 + (-0.8) )

-7.2 still -7.2

then -7.2 × 2 = -14.4

-14.4 - 6.4 = -20.8

-20.8 × (1.8 + (-0.8) )

-0.8 still -0.8

-0.8 = -0.8

1.8 - 0.8 = 1

-20.8 × 1 = -20.8

You might be interested in

Graph the line given by the equation: 2x+4y=-3

Vsevolod [243]

Answer: y=-1/2x-3/4

Step-by-step explanation: I cannot graph it for you, but i can simplify it

6 0

3 years ago

Read 2 more answers

Use the Distributive Property to simplify the expression.I GIVE BRAINLEST AWNSER 6(6+y)

ivanzaharov [21]

Answer:

36+6y

Step-by-step explanation:

you have to multiply 6 on 6+y because distributive property basically means to share out so you do 6(6)+(6)y

6(6) equals 36 (6x6) and 6(y) is just 6y

36+6y

5 0

3 years ago

One method of slowing the growth of an insect population without using pesticides is to introduce into the population a number o

Zielflug [23.3K]

To be clear, the given relation between time and female population is an integral:
 $t = \int { \frac{P+S}{P[(r - 1)P - S]} } \,
dP$

The problem says that r = 1.2 and S = 400, therefore substituting:
 $t = \int { \frac{P+400}{P[(1.2 - 1)P - 400]}
} \, dP$ 

= $
\int { \frac{P+400}{P(0.2P - 400)} } \, dP$

In order to evaluate this integral, we need to write this rational function in a simpler way:
 $\frac{P+400}{P(0.2P - 400)} = \frac{A}{P} +
\frac{B}{(0.2P - 400)}$ 

where we need to evaluate A and B. In order to do so, let's calculate the LCD:
 $\frac{P+400}{P(0.2P - 400)} = \frac{A(0.2P -
400)}{P(0.2P - 400)} + \frac{BP}{P(0.2P - 400)}$ 

the denominators cancel out and we get:
P + 400 = 0.2AP - 400A + BP
 = P(0.2A + B) - 400A

The two sides must be equal to each other, bringing the system:
 $\left \{ {{0.2A + B = 1} \atop {-400A =
400}} \right.$ 

Which can be easily solved:
 $\left \{ {{B=1.2} \atop {A=-1}} \right.$ 

Therefore, our integral can be written as:
 $t = \int { \frac{P+400}{P(0.2P - 400)} } \,
dP = \int {( \frac{-1}{P} + \frac{1.2}{0.2P-400} )} \, dP$ 
= $- \int { \frac{1}{P} \, dP +
1.2\int { \frac{1}{0.2P-400} } \, dP$ 
= $- \int { \frac{1}{P} \, dP +
6\int { \frac{0.2}{0.2P-400} } \, dP$ 
= - ln |P| + 6 ln |0.2P - 400| + C

Now, let’s evaluate C by considering that at t = 0 P = 10000:
0 = - ln |10000| + 6 ln |0.2(10000) - 400| + C
C = ln |10000| - 6 ln |1600|
C = ln (10⁴) - 6 ln (2⁶·5²)
C = 4 ln (10) - 36 ln (2) - 12 ln (5) 
 Therefore, the equation relating female population with time requested is:
t = - ln |P| + 6 ln |0.2P - 400| + 4 ln (10) - 36 ln (2) - 12 ln (5)

8 0

3 years ago

Find the measure of the inscribed angle indicated

solmaris [256]

Answer:

77°

Step-by-step explanation:

there's a rule, look it up

7 0

3 years ago

An equation is shown below: 6(2x – 11) + 15 = 3x + 12 Part A: Write the steps you will use to solve the equation, and explain ea

Aleks04 [339]

1.) you would distribute the 6---- 12x-66+15
2.) you would add like terms---- 12x-51=3x+12
3.) you would subtract 3x from each side of the equal sign---- 9x-51=12
4.) you would add 51 on each side of the equal sign----9x=63
5.) you would divide both sides of the equal sign by 9 giving you you answer--------- x=7

6 0

3 years ago

Read 2 more answers