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3 years ago

Need help!!!!!!!!!!!!!

Mathematics

2 answers:

jekas [21]3 years ago

8 0

4.6x-3 + (-5.3+9)

=-0.7x + 6

hope that helps

disa [49]3 years ago

7 0

Hello!

The problem is asking that we add the following two expressions:

(4.6x – 3) + (-5.3x + 9)

When adding or subtracting binomials, you need only to add or subtract similar terms. In this case, you will add the two coefficients of X (4.6 and -5.3) and the two constants (-3 and 9). Let’s try this first step now:

4.6x + (-5.3)x = (-0.7)x

Now we’ll add the two constants:

(-3) + 9 = 6

Now combine the two sums to create a single binomial expression:

-0.7x + 6

This is the sum of the two given binomial expressions.

I hope this helps!

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Let θ

konstantin123 [22]

Answer:

θ is decreasing at the rate of $\frac{21}{16}$ units/sec

or $\frac{d}{dt}$ (θ) = $\frac{-21}{16}$

Step-by-step explanation:

Given :

Length of side opposite to angle θ is y

Length of side adjacent to angle θ is x

θ is part of a right angle triangle

At this instant,

x = 8 , $\frac{dx}{dt}$ = 7

( $\frac{dx}{dt}$ denotes the rate of change of x with respect to time)

y = 8 , $\frac{dy}{dt}$ = -14

( The negative sign denotes the decreasing rate of change )

Here because it is a right angle triangle,

tanθ = $\frac{y}{x}$ -------------------------------------------------------------------1

At this instant,

tanθ = $\frac{8}{8}$ = 1

Therefore θ = π/4

We differentiate equation (1) with respect to time in order to obtain the rate of change of θ or $\frac{d}{dt}$ (θ)

$\frac{d}{dt}$ (tanθ) = $\frac{d}{dt}$ (y/x)

( Applying chain rule of differentiation for R.H.S as y*1/x)

$sec^{2}$ θ $\frac{d}{dt}$ (θ) = $\frac{1}{x}$ $\frac{dy}{dt}$ - $\frac{y}{x*x}$ $\frac{dx}{dt}$ -----------------------2

Substituting the values of x , y , $\frac{dx}{dt}$ , $\frac{dy}{dt}$ , θ at that instant in equation (2)

2 $\frac{d}{dt}$ (θ) = $\frac{1}{8}$ *(-14)- $\frac{8}{8*8}$ *7

$\frac{d}{dt}$ (θ) = $\frac{-21}{16}$

Therefore θ is decreasing at the rate of $\frac{21}{16}$ units/sec

or $\frac{d}{dt}$ (θ) = $\frac{-21}{16}$

3 0

3 years ago

Which term has a degree of 8?<br> A.8xy<br> OB. -22³5<br> OC. 9ry<br> OD. 3x²y4

Damm [24]

The term that has a degree of 8 is -2x³y⁵

<h3>How to find the degree of a polynomial?</h3>

The polynomial above is a monomial. A monomial is a polynomial with a single term.

Therefore, the degree of a monomial is the sum of the exponents of all its variables.

In other words, a monomial is a number, a variable or a product of a number and a variable where all exponents are whole numbers.

Hence, the term with degree of 8 is -2x³y⁵

Degree = 0 + 3 + 5 = 8

learn more on degree here: brainly.com/question/14939467

#SPJ1

6 0

1 year ago

About how many liters can a water cooler hold if it can hole 50 pints

Natalka [10]

23.6588 liters

1 pint is equal to 0.473176 liters.

6 0

3 years ago

You buy a new video game for $59.99$59.99. The sales tax is 8%8%. What is the total cost for the game including sales tax?

morpeh [17]

59.99(1.08)= 64.7892

64.7892 rounded to the nearest cent= $64.79

The answer is $64.79.

Hope this helps!

3 0

3 years ago

Please help asap!!!!

sashaice [31]

Try 10 as the answer. Good luck

8 0

3 years ago