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2 years ago

The perimeter of the rectangle is 28 units.

Mathematics

1 answer:

den301095 [7]2 years ago

5 0

Answer:

the value of w is 30

Step-by-step explanation:

length=2w-1 (l)

breadth=w(b)

now,

perimeter of rectangle=2(l×b)

28=2(2w-1+w)
28=4w-2+2w
28+2=6w
w=30/6
W=30

<h3>stay safe healthy and happy.</h3>

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What is the rule? 100 cm 1 m, 250 cm ? M, 1500 cm ? M

kirza4 [7]

There are 100 cm(centimeters) in a m(meter).
So, to solve this, we divide 250 by 100. this gives us 2.5meters.
1500÷100=15meters
The rule is m=cm÷100.

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2 years ago

Given that f(–2.4) = -1 and f(-1.9) = -8, approximate<br> f'(-2.4).<br> f'(-2.4)

lora16 [44]

Answer:

f'(-2.4) ≈ -14

General Formulas and Concepts:
<u>Algebra I</u>

Coordinate Planes

Coordinates (x, y)

Slope Formula: $\displaystyle m = \frac{y_2 - y_1}{x_2 - x_1}$

Functions

Function Notation

<u>Calculus</u>

Differentiation

Derivatives
Derivative Notation

Step-by-step explanation:

*Note:

The definition of a derivative is the slope of the <em>tangent</em> <em>line</em>.

<u>Step 1: Define</u>

<em>Identify.</em>

f(-2.4) = -1

f(-1.9) = -8

<u>Step 2: Differentiate</u>

Simply plug in the 2 coordinates into the slope formula to find slope <em>m</em>.

[Derivative] Set up [Slope Formula]: $\displaystyle f'(-2.4) \approx \frac{f(x_2) - f(x_1)}{x_2 - x_1}$
Substitute in coordinates: $\displaystyle f'(-2.4) \approx \frac{-8 - -1}{-1.9 - -2.4}$
Evaluate: $\displaystyle f'(-2.4) \approx -14$

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Learn more about derivatives: brainly.com/question/17830594

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Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit: Differentiation

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2 years ago

5. Grace has $39 She has 8 less than her brother. How much<br> money does Grace's brother have?

alukav5142 [94]

Answer:

Grace's brother has $47.

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3 years ago

Read 2 more answers

If $1= rs 115.4 ( buying rate ) and $1=rs116.20(selling rate). find the profit while selling and buying $6000.

Galina-37 [17]

The profit is Rs.4800.

<h3>What is profit?</h3>

When, in a transaction, the selling price is greater than the cost price, it means we earn a profit. It is calculated with the help of the formula: Profit = Selling price - Cost price.

Given that,

S.P =$6000

C.P = $6000

If, 1$ = Rs.115.4 (in cost price)

1$ = Rs.116.20 (in selling price)

Then,

C.P = Rs. 115.40×6000

S.P = Rs. 116.20×6000

Then,

Profit = S.P-C.P

= 116.20×6000 -115.40×6000

= (116.20-115.40)×6000

= 0.80×6000

= Rs.4800

Hence, The profit is Rs.4800.

To learn more about profit from the given link:

brainly.com/question/19104371

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7 0

1 year ago

]. six pears and three apples cost $3.90. two pears and five apples cost $3.30. how much does one pear cost

Ilya [14]

Write the equation of the cost
p stands for the cost per pear, a stands for the cost per apple
6p + 3a = 3.9
2p + 5a = 3.3

Solve the equation system
To solve the equation system, we work on eliminating variable p so we will find the number of a. To eliminate, we have to change the coefficient of p to the same number (i will change it to coefficient 6)
6p + 3a = 3.9 (multiply 1)
2p + 5a = 3.3 (multiply 3)
---------------------------------
6p + 3a = 3.9
6p + 15a = 9.9
-------------------- - (substract)
-12a = -6
a = -6/-12
a = 0.5

To find the cost per pear, subtitute the number of a to one of the equation
2p + 5a = 3.3
2p + 5(0.5) = 3.3
2p + 2.5 = 3.3
2p = 3.3 - 2.5
2p = 0.8
p = 0.4

The cost of one pear is $0.4

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3 years ago