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3 years ago

(x-4)2 + 3x at the value x = 7

Mathematics

2 answers:

Volgvan3 years ago

6 0

Answer:

Step-by-step explanation:

x = 7

( x - 4 )^2 + 3x

= ( 7 - 4 )^2 + 3 ( 7 )

= 3^2 + 21

= 9 + 21

= 30

julia-pushkina [17]3 years ago

4 0

Answer:

The answer is 27

Step-by-step explanation:

(X-4)2 + 3x

x is equal to 7

first substitute the values.

(7-4)2 + 3 x 7

solve-

(3)2 + 21

=27

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A cone has a radius of 5 ft and a height of 15 ft. It is empty and is being filled with water at a constant rate of 15 15 ft 3 f

kvasek [131]

Answer:

$\frac{dr}{dt}=0.11062ft/sec$

Step-by-step explanation:

From the question we are told that:

Radius $r=5ft$

Height $H=15ft$

Rate $R=15ft/3sec =5ft/s$

Surface Radius $R_{surf}=2.2ft$

Generally the equation for Volume is mathematically given by

$V=\frac{1}{3}\pi*r^2h$

Since radius to height ratio gives

$\frac{r}{h}=\frac{5}{15}$

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

$h=3r$

Therefore

$V=\frac{1}{3}\pi*r^2(3r)$

$V=\pi r^3$

Generally the equation for Change of Volume is mathematically given by

$\frac{dv}{dt}=\pi \frac{d}{dt}(r^3)$

$\frac{dv}{dt}=\pi 3*r^2 \frac{dr}{dt}$

$\frac{dv}{dt}=\pi 3*(2.2)^2 \frac{dr}{dt}$

$\frac{dr}{dt}=\frac{5}{45.62}$

$\frac{dr}{dt}=0.11062ft/sec$

3 0

3 years ago

Can any one please help me with these Math questions soon as possible?

disa [49]

Answer:

the answer to the first question is 9/27, 5/27, 13/27

the answer to the second question is 27/126, 33/126, 20/126, 42/126

the answer to the last question is 32/44

Step-by-step explanation:

they way you solve the fist two questions you just add the numbers up and that will tell you your probability.

for the last question you take the number of players and subtract it by 12 to get the top number

7 0

3 years ago

75 is 128% of what number

Oksana_A [137]

$\bold \pink{let \: the \: number \: be \: x}$

$\mathsf{128\% \times x = 75}$

$\\ \\ \frac{128}{100} \times x = 75 \\ \\ x = \frac{75}{1} \times \frac{100}{128} \\ \\ x = \frac{7500}{128}$

$\boxed{x = 58.59375}$

75 is 128% of 58.59375

5 0

3 years ago

Read 2 more answers

The regular price of a baseball bat is $38.20. The baseball bat is on sale for %20 off the regular price. Josef has a coupon for

Aleksandr-060686 [28]

Answer:

$27.5

Step-by-step explanation: