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3 years ago

The value of (2+3)(2-3) is

Mathematics

2 answers:

NARA [144]3 years ago

7 0

Step-by-step explanation:

(2+3)(2-3)

=5×(-1)

= -5

good morning

have a great day

sertanlavr [38]3 years ago

7 0

Step-by-step explanation:

(2+3)(2-3)

=5×(-1)

= -5

hope this helps you

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In the equation y = 39x + 50represents the number of people at a holiday dinner and y represents the total cost of

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Answer:

The correct answer is - 12.

Step-by-step explanation:

Given:

Total number of people = y = 39x+50

Total amount spent y = 518

Solution:

The equation for the number of people who attended the dinner

y = 39x+50

The cost of dinner is equally divided by number of people =

then, 518 = y

placing value, 518 = 39x+50

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If 5 + 20 times 2 Superscript 2 minus 3 x Baseline = 10 times 2 Superscript negative 2 x Baseline + 5, what is the value of x? –

sp2606 [1]

Answer:

<h3>Option D) 3 is correct</h3><h3>Therefore the value of x is 3</h3>

Step-by-step explanation:

Given equation is $5+20\times (2)^{2-3x}=10\times (2)^{-2x}+5$

<h3>To find the value of x :</h3>

First solving the given equation we have,

$5+20\times (2)^{2-3x}=10\times (2)^{-2x}+5$

$5+20\times (2)^{2-3x}-5=10\times (2)^{-2x}+5-5$

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$20\times (2)^2.(2)^{-3x}=10\times (2)^{-2x}$

$20\times 4.(2)^{-3x}=10\times (2)^{-2x}$

$80(2)^{-3x}=10\times (2)^{-2x}$

$\frac{80}{10}(2)^{-3x}=\frac{10\times (2)^{-2x}}{10}$

$8(2)^{-3x}=(2)^{-2x}$

$\frac{(2)^{-3x}}{(2)^{-2x}}=\frac{1}{8}$

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$2^{-3x+2x}=\frac{1}{2^3}$ ( by using the property $a^m.a^n=a^{m+n}$ )

$2^{-x}=\frac{1}{2^3}$

$\frac{1}{2^x}=\frac{1}{2^3}$ ( by using the property $a^{-m}=\frac{1}{a^m}$ )

Since bases are same so powers are same

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<h3>Therefore the value of x is 3</h3><h3>Option D) 3 is correct</h3>

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Answer:

<h2>The specific heat of the metal is 0.274951 calories/gram-degree C.</h2>

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Let, the specific heat of the container is x calories/gram-degree C.

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Hence, the transfer of heat is $3(18.1\times1000\times1) + 3(3.77x\times1000)$ .

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3 years ago

The value of (2+3)(2-3) is​

The value of (2+3)(2-3) is