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3 years ago

Can somebody plz help me [-5+(-7)]^2-(7+3)^2

Mathematics

2 answers:

Firdavs [7]3 years ago

8 0

Answer:

$\boxed{44}$

Step-by-step explanation:

$[-5+(-7)]^2-(7+3)^2$

Resolving Parenthesis

$(-5-7)^2-(10)^2\\(-12)^2-100\\144-100$

=> 44

Artemon [7]3 years ago

7 0

Answer:

$\boxed{44}$

Step-by-step explanation:

$[-5+(-7)]^2-(7+3)^2$

Solve for brackets first.

$[-12]^2-(10)^2$

Solve the exponent or power.

$144-100$

Subtract the numbers.

$=44$

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An inverted pyramid is being filled with water at a constant rate of 25 cubic centimeters per second. The pyramid, at the top, h

UNO [17]

Answer:

$\frac{225}{16} cm/s$

Step-by-step explanation:

We are given that

$\frac{dV}{dt}=25cm^3/s$

Side of base=4 cm

l=w=4 cm

Height,h=12 cm

We have to find the rate at which the water level rising when the water level is 4 cm.

Volume of pyramid= $\frac{1}{3}lwh=\frac{1}{3}l^2h$

$\frac{l}{h}=\frac{4}{12}=\frac{1}{3}$

$l=\frac{1}{3}h$

Substitute the value

$V=\frac{1}{27}h^3$

Differentiate w.r.t t

$\frac{dV}{dt}=\frac{3}{27}h^2\frac{dh}{dt}$

Substitute the values

$25=\frac{1}{9}(4^2)\frac{dh}{dt}$

$\frac{dh}{dt}=\frac{25\times 9}{16}=\frac{225}{16} cm/s$

5 0

2 years ago

I need help with these questions ( see image for question ).<br>Please show working.<br>

antiseptic1488 [7]

Answer:

k = -4 ± 2√5

Step-by-step explanation:

#22

<h3>Given </h3>

Equation x² -4x + 1 = k(x - 4) with equal roots

The value of k

<h3>Solution</h3>

<u>The equation in standard form is:</u>

x² -4x + 1 = k(x - 4)
x² - 4x - kx + 1 + 4 = 0
x² - (k + 4)x + 5 = 0

<u>When the quadratic equation has equal roots its discriminant is zero</u>

D = 0
b² - 4ac = 0
(k + 4)² - 4*5 = 0
(k + 4)² = 20
k + 4 = ± √20
k = - 4 ± √20
or
k = -4 ± 2√5

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2 years ago

Is table A liner or nonlinear

Kipish [7]

I think table A is liner

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2 years ago

Enter the set described below:

LenKa [72]

Answer:

{1, 5, 25, 125, 625}

Step-by-step explanation:

The smallest positive integers that meet the requirement will be ...

5^0 = 1

5^1 = 5

5^2 = 25

5^3 = 125

5^4 = 625

As a set, these numbers are {1, 5, 25, 125, 625}.

7 0

2 years ago

Which arrangement shows 27/5, 5.36, 5 3/5, 33/6 in order from least to greatest?

tankabanditka [31]

Answer:

5.36 < 27/5 < 33/6 < 5 3/5 or 5.36, 27/5, 33/6, 5 3/5

Step-by-step explanation:

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2 years ago