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Luden [163]
3 years ago
6

CALLING ALL MATHS GENIUSES

Mathematics
2 answers:
erastova [34]3 years ago
7 0
Area is length times width
(X+9)(X-1)
X^2+8x-9
s2008m [1.1K]3 years ago
3 0
Got you. So we will use the basic formula for the area of a rectangle and insert variable values. (^_^)

Area= Width(Height)   ----------- Insert values of width and height [width = (x-1)
, height = (x+9)]

Area= (x-1)(x+9) )   -------------- Then expand if needed?
       = x² +8x -9
 
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Solve the following systems of equations. Express your answer as an ordered pair in the format (a,b), with no spaces between the
kodGreya [7K]

Answer:

(4, 1)

Step-by-step explanation:

3x+4y=16 /*4

-4x-3y= - 19 /*3

 12x + 16y = 64

<u>- 12x -   9y = - 57 </u>

            7y = 7

              y = 1

3x+4y=16

3x + 4*1 = 16

3x = 16 - 4

3x = 12

x = 4

4 0
3 years ago
When 64 is added to the number that is produced by doubling the number x, the result is equal to 35 times the number that 1 less
photoshop1234 [79]
64+(2x)=35(x-1)
expand
64+2x=35x-35
minus 2x from both sides
64=33x-35
add 35 to both sides
99=33x
divide both sides by 33
3=x
the number is 3
6 0
3 years ago
the sum of the digits of a two number is 14 .if 36 is substracted from the number,the places of the digits are reversed.find the
Taya2010 [7]
The number in the ones place= X
The number in the tenths place= y
y+x=14.
y=14-x

Original placement of numbers=10y+x
New placement of numbers(after subtraction of 36)= 10x+y

10y+ x-36=10x+y
Substitute y with 14-x
So we would get

10(14-x)+ x-36=10x+(14-x)
=140-10x+x-36=10x+14-x
After transposing we get
140-14-36=10x-x+10x-x
=90=18x
X=90/18
x=5

Y=14-x
=14-5
=9


So the two digit number is
10y+x
=90+5
=95
5 0
3 years ago
Triangle ABC is similar to triangle FED, find the measure of x. A. X = 9 B. X = 11 C. X = 110 D. X = 231
just olya [345]

Answer:

A+B+C=130

F+E+D=273

Step-by-step explanation:

From the question we are told that:

Dimension of ABC

A=9

B=11

C=110

Dimension of FED

D=231

Generally the equation for the similar triangles is mathematically given by

\frac{A}{F}=\frac{B}{E}=\frac{C}{D}

Therefore solving for F

\frac{9}{F}=\frac{110}{231}

F=\frac{9*231}{110}

F=18.9

Therefore solving for E

\frac{11}{E}=\frac{110}{231}

E=\frac{11*231}{110}

E=23.1

Measure of \triangle ABC

A+B+C=130

Measure of \triangle FED

F+E+D=273

5 0
3 years ago
Line A passes through the points (-1, 4) and (4, 9). Line B passes through the points (4, -4) and (-3, 24). Find the point where
exis [7]
A calculator can help
7 0
2 years ago
Read 2 more answers
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