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3 years ago

-5x2 - 9x + 8 from – 6x2 +5

Mathematics

1 answer:

777dan777 [17]3 years ago

3 0

Answer:

-x^2+9x-3

Step-by-step explanation:

– 6x^2 +5 - (-5x^2 - 9x + 8)

Distribute the minus sign

-6x^2 +5 +5x^2 +9x -8

Combine like terms

-x^2+9x-3

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Find the perimeter of the figure. Round all figures to the nearest hundredths place. Isosceles trapezoid

zhannawk [14.2K]

Answer:

d. 92.84

Step-by-step explanation:

The top edge overhangs the bottom edge by (39 -27)/2 = 6 ft on both ends. This makes the slant side have length

.. √((6 ft)^2 +(12 ft)^2) = 6√5 ft

Then the perimeter is

.. (39 +6√5 +27 +6√5) ft = 66 +12√5 ft

= 92.83 ft

6 0

2 years ago

Solve the inequality.<br> y + 11 <-3<br> The inequality is____<br> Pls help:/

BartSMP [9]

Answer:

-14

Step-by-step explanation:

step 1:

Subtract 11 from both sides.

y+11−11<−3−11

y<−14

8 0

2 years ago

Read 2 more answers

What is the solution to the equation x + 11 = 57? (Input a whole number only.) Numerical Answers Expected! Answer for Blank 1:

Ymorist [56]

X + 11 = 57
- 11 - 11
x = 46

6 0

3 years ago

(1 point) Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference betw

slavikrds [6]

Answer:

a. $\frac{dT}{dt}=k(T-Tm); T(0)=190$

b. $C_{0}=122$

c. $k=-0.00259$

d. $t=153.39838\\$ minutos

Step-by-step explanation:

a. Newton's law of cooling states that the speed with which a body is cooled is proportional to the difference between its temperature and that of the medium in which it is found. Then, the initial value problem is given by:

$Tm=68$

$\frac{dT}{dt}=k(T-Tm); T(0)=190$

b. The differential equation obtained is a differential equation of separable variables:

$\frac{dT}{T-Tm}=kdt\\\\\int {\frac{dT}{T-Tm}}=\int{kdt}\\\\Ln|T-Tm|=kt+C\\\\T(t)=C_{0}e^{kt}+Tm=C_{0}e^{kt}+68\\\\T(0)=C_{0}e^{k(0)}+68=190\\\\C_{0}=122$