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Galina-37 [17]
3 years ago
14

Solve for X when the surface area is 298ft^2

Mathematics
1 answer:
jok3333 [9.3K]3 years ago
6 0

Step-by-step explanation:

Total surface area of cuboid= 2(lb+bh+hl)

= 298ft²=2(28+4x+7x)

= 149=28+11x

= 121=11x

= 11=x

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Wich statment describes the role of a mitochondrion in providing a body with energy
Andrews [41]

Answer:

Mitochondria is the site where oxygen combines with small molecules and releases large amounts of energy.

Mitochondria is a cell organelle

It produces ATP, which is considered as energy currency of cell.

3 0
3 years ago
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If y-3x=9, 7x+y=25, what is the value of x and y?
lianna [129]

\bold{\rm{Given}}\text{ : If y - 3x = 9, 7x + y = 25, what is the value of x and y}?

\bold{\rm{Solution}} \text{: We'll solve this by substitution method}

\dashrightarrow  y - 3x = 9 \\  \\  \dashrightarrow   \boxed{y = 9 + 3x } \qquad .. \sf eq(1)

\text{we got the value of y now getting the value of x}

\looparrowright 7x + y = 25 \\  \\  \looparrowright 7x = 25 - y \\  \\  \looparrowright  \boxed{x =   \frac{25 - y}{7}} \qquad .. \sf eq(2)

\text{Now, putting y = 9 + 3x in eq(2)}

\hookrightarrow  x =  \frac{25 - y}{7}   \\  \\ \hookrightarrow  x =  \frac{25 - 9 + 3x}{7}  \\  \\ \hookrightarrow  7x =  25 - 9 + 3x \\  \\ \hookrightarrow  7x - 3x =  16 \\  \\ \hookrightarrow  4x = 16 \\  \\ \hookrightarrow  x =  \frac{16}{4}  \\  \\ \star \quad  \boxed{ \green{ \frak{ x = 4}}}

\text{Now we know the value of x, for getting y we need to put x in eq(1)}

: \implies y = 9 + 3x \\  \\   : \implies y = 9 + 3(4) \\  \\  : \implies y = 9 + 12  \\  \\    \star \quad  \boxed{\frak{  \green{y = 21}}}

\text{Hence, values of x and y are} \:  \frak{ \green{4}}  \: \text{and} \:  \frak{ \green{21}} \: \text{respectively}.

4 0
2 years ago
Alexis paid $50 to active her cell phone plus a service fee of $20 per month.She used the phone for 3 months. How much has she p
TEA [102]

Answer:


Step-by-step explanation:

She paid $50 to activate one time and pays $20/ month

20.00x3=60.00

60.00+50.00=110.00

7 0
3 years ago
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10% of £22 <br><br> 5% of £22 <br><br> 15% of £22<br><br> —————-<br> please help!
dybincka [34]

Step-by-step explanation:

10% of £22

10/100×22/1

2.2%

5% of £22

5/100×22/1

1.1%

15% of 22£

15/100×22/1

3.3%

5 0
3 years ago
Write <br> 0.28<br> as a fraction in simplest form.
Usimov [2.4K]

7/25

First thing you want to do is put it over 100

28/100

Now divide by 4

28÷4=7

100÷4=25


6 0
3 years ago
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