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3 years ago

I need help with writing expressions so I can learn how to do the rest

Mathematics

1 answer:

nevsk [136]3 years ago

5 0

Answer:

look its really simple like if there is written the father age is two times than its son and its is also said sum of their age becomes 25 then

Step-by-step explanation:

solution,

let father and son age be x and y

2x =y ---------------(i)

x+y=25----------------(ii)

now,

putting the value of y in equation two we get,

x+(2x)=25

3x=25

x=25/3

x=8 yrs ( using round off)

again,

2x = y

2×8=y

16=y

therefore, father age is 16 and son age is 8

mark me brianliest

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What is the explicit equation for this series 25,21,17,13

Neko [114]

Answer:

The explicit rule is:

Step-by-step explanation:

The explicit rule is given by:

$a_n=a_1+d(n-1)$

The given sequence is 25,21,17,13

$a_1=25$

d=21-25

d=-4

We plug in the values into the formula to get;

$a_n=25+-4(n-1)$

$a_n=25-4n+4$

$a_n=29-4n$

6 0

3 years ago

The total surface area of a cube is 96cm2, find its volume.

Setler [38]

Answer:

$\huge\boxed{V=64cm^3}$

Step-by-step explanation:

The formula of a surface area of a cube:

$SA=6a^2$

The formula of a volume of a cube:

$V=a^3$

We have

$SA=96cm^2$

Calculate the edge length (<em>a</em>).

$6a^2=96$ <em>divide both sides by 6</em>

$a^2=16\to a=\sqrt{16}\\\\a=4(cm)$

Calculate the volume of a cube:

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6 0

3 years ago

What is the distance between the points (-3, 1) and (1, 3)?

Murrr4er [49]

Answer:

4.47

Step-by-step explanation:

a^2+b^2=c^2

2^2+4^2=c^2

4+16=c^2

20=C^2

$\sqrt{20}$ = $\sqrt{c^2}$

4.47=c

3 0

3 years ago

PLZ HELP ASAP

svet-max [94.6K]

Answer is D:
e + 5 = 3e - 11

2e = 16
e = 8

Ella is 8 years old
Jamie is 8+5 = 13 years old

6 0

3 years ago

What is x squared equals 9 over 256

Lady bird [3.3K]

Answer:

9^2/256

Exact form is 81/256

Decimal form is 0.31640625

Step-by-step explanation:

Raise 9 to the power of 2.

81/256

The result can be shown in multiple forms.

Exact Form:

81/256

Decimal Form:

0.31640625

4 0

3 years ago

I need help with writing expressions so I can learn how to do the rest​

I need help with writing expressions so I can learn how to do the rest