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oksian1 [2.3K]
2 years ago
9

Plzzzzzzzzzz helpppppppp

Mathematics
1 answer:
Minchanka [31]2 years ago
7 0

Answer:

i'd say do it with division what equals 31? im not going to say the staright up answer

]

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if the lenght of a rectangle is (2x - 8) cm and the with is (x - 2) cm and the perimeter is 84 cm what is the value of the lengt
Oxana [17]

Answer:

Step-by-step explanation:

Perimeter = 84 cm

2*(length + width) = 84

2* (2x - 8 + x - 2) = 84

2*(2x + x - 8 - 2) = 84   {bring like terms together}

2*(3x - 10) = 84    {add/ subtract like terms}

Divide both sides by 2

\frac{2*(3x-10)}{2}=\frac{84}{2}\\\\

3x - 10 = 42

3x - 10 +10 = 42 + 10   {add 10 to both sides}

3x = 52

Divide by 3,

\frac{3x}{3}=\frac{52}{3}\\

x= 17 1/3

Length = 2x - 8

=2*\frac{52}{3}-8\\\\=\frac{104}{3}-\frac{8*3}{1*3}\\\\=\frac{104}{3}-\frac{24}{3}\\\\=\frac{104-24}{3}\\\\=\frac{80}{3}\\\\=26\frac{2}{3}

6 0
3 years ago
I'm really bad at math!
Igoryamba

Given : (5b - 9) - 3(8 - 26)

⇒ (5b - 9) - 3(-18)

⇒ (5b - 9) + 54

⇒ 5b - 9 + 54

⇒ 5b + 45

3 0
3 years ago
Read 2 more answers
C is the circumcenter of APQR.<br> PC=3x+7, RC=5x-15, &amp; QC=51-X<br> x=[?]
amm1812

Answer:

x = 11

Step-by-step explanation:

C is the circumcenter of \triangle PQR

\implies PC=QC=RC (Radii of same circle)

\implies RC=QC

\implies 5x-15=51-x

\implies 5x +x=51+15

\implies 6x =66

\implies \: x =  \frac{66}{6}  \\  \\  \implies \:  \huge \:  \red{x = 11}

8 0
2 years ago
Solve<br> 13^x+2=5<br> having a bit of trouble
-Dominant- [34]
<em>Solve: </em>13^{x} + 2 = 5

Start by isolating the x-variable as much as you can:
13^{x} = 5 - 2 = 3
13^{x} = 3

Now, if we take the log with base 13 of both sides, then the left hand side will cancel out really easily. This is based on the concept of inverse operations. For example, when we take the square of a square root, we get our initial value. This is because the two operations are inverses of each other, and basically undoes each other.

Logarithms and exponentials are the inverse operations of each other. If we want to extrapolate the power of an exponential, we take the logarithmic function of it, and vice versa.

In this case, we are saying what power of '13' will produce us with 13ˣ, and the only answer will be x itself.

log_{13}(13^{x}) = log_{13}(3)
x = log_{13}(3)
3 0
3 years ago
If the coordinates of a point p(m-3 , -6) = p(-7 , -6), then find the value of m .
Serggg [28]

Answer:

m =-4

Step-by-step explanation:

Given

p(m-3 , -6) = p(-7 , -6)

Required

Find m

p(m-3 , -6) = p(-7 , -6)

By comparison:

m-3  = -7

Add 3 to both sides

m = -7+3

m =-4

8 0
2 years ago
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