Answer please thanks

Mathematics

1 answer:

Nezavi [6.7K]4 years ago

4 0

Answer:

too blurry pls send new pic

Step-by-step explanation:

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What is the answer to 2/3a-7=-3

MrRa [10]

Answer:

a = 6

Step-by-step explanation:

$\frac{2}{3} a - 7 = -3\\\frac{2}{3} a = 4\\2a = 12\\a = 6$

4 0

4 years ago

What is the total surface area of a cylinder? Write your answer as a polynomial in standard form.

My name is Ann [436]

Surface area of a cylinder=area of 2 bases+area of around cylinder
area of bases=area of circle os 2 times pi times r^2
area of around=circunferenc of circle times height of cylnder=2 timespi timer r times height so 2pirh
so add
area of bases+area around=2pir^2+2pirh
not sure what standard form is
so he answer is
2pi(r^2)+2pi(r)(h)

3 0

3 years ago

Answer this question. please

dimaraw [331]

Answer:

$\boxed{\textsf{ The total surface area of the cuboid is \textbf{62 cm} $\sf ^2$ .}}$

Step-by-step explanation:

Given that the base area of the cuboid is 7cm² . And it's volume is 21cm³ . We need to find its total surface area . Now here we need to find the height . We can find height as ,

Height :-

$\qquad\boxed{\boxed{\sf Height =\dfrac{ Volume}{Area } }}$

$\sf\implies Height =\dfrac{Volume}{Area} \\\\\sf\implies h =\dfrac{ 21cm^3}{7cm^2}\\\\\implies \boxed{ \pink{\frak { Height = 3 cm.}}}$

$\rule{200}2$

Let's find out the Total surface area .

TSA of cuboid :-

$\qquad\boxed{\boxed{\sf TSA_{(cuboid)} =2(lb + bh + hl ) }}$

Put on the respective values :-

$\sf\implies TSA_{(cuboid)}= 2( lb + bh + hl )\\\\\sf\implies TSA_{(cuboid)}= 2( 7cm\times 1cm + 1cm\times 3cm + 3cm \times 7 cm ) \\\\\sf\implies TSA_{(cuboid)}=2 ( 7cm ^2+3cm^2+21cm^2 ) \\\\\sf\implies TSA_{(cuboid)}= 2\times 31cm^2 \\\\\sf\implies \boxed{\pink{\frak{ TSA_{(cuboid)}= 62 cm^2}}}$