3 years ago

PLS HELP

Mathematics

1 answer:

Setler79 [48]3 years ago

4 0

1 + x = 46 (1+ x) your welcome <3

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Please help! Find the value of C such that each expression is a perfect-square trinomial.

crimeas [40]

For ax^2+bx+c
when a=1
take 1/2 of b and square it
that is what c should be ideally

p^2-30p=c
-30/2=-15
(-15)^2=225
c=225
(p-15)^2 is factored form

k^2-5k+c
-5/2
(-5/2)^2=25/4
c=25/4
factored form is (x-5/2)^2

5 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:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Geometry

Volume of a Rectangular Prism: V = lwh

Calculus

Derivatives

Derivative Notation

Differentiating with respect to time

Basic Power Rule:

f(x) = cxⁿ
f’(x) = c·nxⁿ⁻¹

Step-by-step explanation:

Step 1: Define

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

Step 2: Differentiate

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

Step 3: Solve for Rate

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

An item is regularly priced at $80 . Sam bought it at a discount of 60% off the regular price. How much did Sam pay?

Nikitich [7]

Sam paid $32 for the item.

6 0

3 years ago

Aaron has 50cent. he buys a pencil for 40cent how much change does he get

lana [24]

Answer:

10¢

Step-by-step explanation:

Step 1: Subtract 40 from 50

$50 - 40 = 10$

Then, Aaron will get 10 cents back

7 0

3 years ago

Read 2 more answers

At a store, cartons of whole milk costs $10.50 and 5 cartons of fat free milk costs $5.00. How much would it cost to buy 3 carto

Lostsunrise [7]

Answer:

$31.50

Step-by-step explanation:

7 0

3 years ago