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Genrish500 [490]

2 years ago

7

Show you work for full credit Use the SUBSITUTION method or ELIMINATION method to solve this system of equations. y = 4x and 8x

+ y = 18

1 answer:

vodka [1.7K]2 years ago

8 0

Answer:

A. (3/2, 6)

Step-by-step explanation:

Use the substitution method:

8x + y = 18 and y = 4x

8x +4x = 18

12x = 18

x = 18/12 = 3/2

y = 4x

= 4(3/2)

= 12/2

= 6

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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
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Step-by-step explanation:

<u>Step 1: Define</u>

<u /> $l = 30 \ cm\\w = l\\\frac{dl}{dt} = 2 \ cm/h\\h = 20 \ cm\\\frac{dh}{dt} = 3 \ cm/h$ <u />

<u />

<u>Step 2: Differentiate</u>

Rewrite [VRP]: $V = l^2h$
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<u>Step 3: Solve for Rate</u>

Substitute: $\frac{dV}{dt} = 2(30 \ cm)(2 \ cm/h)(3 \ cm/h)$
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Here this tells us that our volume is decreasing (ice melting) at a rate of 360 cm³ per hour.

3 0

3 years ago

What is the value of y?<br><br> 39<br> 34<br> 16<br> 20 <br><br> one of those number is the answer

melomori [17]

Answer:

20

Step-by-step explanation:

we see here that angle RPN is 180 degrees. SPM is 90 degrees so

angle RPS + angle SPM + angle MPN = 180 degrees

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5 0

3 years ago

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DiKsa [7]

Answer:9090

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5 0

3 years ago

Read 2 more answers

sashaice [31]

B. 90
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3 0

3 years ago

Find and explain wallys mistake!!

Marysya12 [62]

Answer:

What Wally did wrong is that it is supposed to be (4a-5)(a-4)

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If he used (4a+5)(a+5)

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Step-by-step explanation:

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3 years ago