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3 years ago

Help please it’s due in 20 minutes

Mathematics

1 answer:

blagie [28]3 years ago

4 0

Answer:

X = 34 (by Pythagoras theorem)

STEP BY STEP:

(30) ^2 +(16)^2 =1156

Root 1156 =34

I hope it helps :))

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M=-(4+m)+2 solve for m

Orlov [11]

Answer:m =-1

Step-by-step explanation:

To solve m=-(4+m)+2

Open the brackets

m=-4-m+2

Collect like terms

m+m=-4+2

2m=-2

Divide through by -2

m=-1

3 0

4 years ago

(I BEG U TUTORS HELP) the value if x=9 a solution to the system of equations shown below. Where b is some unknown constant. Dete

Masja [62]

Answer:

b = 43

Step-by-step explanation:

So let's plug things in first:

y= 2x - 20 and y= -5x +b which can become →

2x - 20 = -5x + b (now you said that x=9 so let's plug that in)

2(9) -20 = -5(9) + b (now try solving that)

18 -20 = -45 + b → -2 = -45 + b ( so then add 45 to both sides)

43 = b ( and there's your answer )

7 0

3 years ago

A block of ice has a square top and bottom and rectangular sides. At a certain point in

Lilit [14]

Answer:

$\frac{dV}{dt} = 360 \ cm^3/h$

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

<u>Geometry</u>

Volume of a Rectangular Prism: V = lwh

<u>Calculus</u>

Derivatives

Derivative Notation

Differentiating with respect to time

Basic Power Rule:

f(x) = cxⁿ
f’(x) = c·nxⁿ⁻¹

Step-by-step explanation:

<u>Step 1: Define</u>

<u />

<u>Step 2: Differentiate</u>

Rewrite [VRP]: $V = l^2h$
Differentiate [Basic Power Rule]: $\frac{dV}{dt} = 2l\frac{dl}{dt} \frac{dh}{dt}$

<u>Step 3: Solve for Rate</u>

Substitute: $\frac{dV}{dt} = 2(30 \ cm)(2 \ cm/h)(3 \ cm/h)$
Multiply: $\frac{dV}{dt} = 360 \ cm^3/h$

Here this tells us that our volume is decreasing (ice melting) at a rate of 360 cm³ per hour.

3 0

3 years ago

7(n+4) ....................

Juli2301 [7.4K]

Answer:

Step-by-step explanation:

$7(n + 4)$

Expand

$7 \times n = 7n \\ 7 \times 4 = 28 \\ \\ 7n + 28$

4 0

3 years ago

Use the provided information to write the standard form equation of the parabola.

zalisa [80]

Answer:

Step-by-step explanation:

Parabola f(x) = ax² + bx + c passing through points (8,0) and (12,0) means that 8 and 12 are its root and (x-8) and (x-12) are its factors

So we get:

f(x) = a(x - 8)(x - 12)

The parabola passes through point (13, -5) that means if x=13 then f(x)=-5

So:

-5 = a(13 - 8)(13 - 12)

-5 = a(5)(1)

-5 = 5a

a = -1 {<0 so parabola opens down}

Therefore:

f(x) = -(x - 8)(x - 12)

And expanding:

f(x) = -(x² - 12x - 8x + 96)

So the standard form equation of the parabola:

3 0

3 years ago