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3 years ago

15

12+5x-8=12x-10 Help me solve it step by step

1 answer:

9966 [12]3 years ago

6 0

The first thing you want to do is combine like terms

4 + 5x = 12x -10

and make x on one side alone

14 = 7x

divide by 7 to make x alone

2 = x

The answer is 2

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2 years ago

The altitude of a triangle is increasing at a rate of 3 3 centimeters/minute while the area of the triangle is increasing at a r

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3 years ago

The triangles are similar

hoa [83]

Answer:

Part 1) $x=16\ units$

Part 2) $x=23\ units$

Part 3) $AE=20\ units$

Part 4) $x= 6.25\ units$

Part 5) $x=26.67\ in$

Step-by-step explanation:

Part 1) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

so

In this problem

$\frac{12}{3}=\frac{x}{4}\\\\3x=12*4\\ \\x=48/3\\ \\x=16\ units$

Part 2) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

so

In this problem

$\frac{36}{12}=\frac{39}{(x-10)}\\\\3(x-10)=39\\ \\x=(39/3)+10\\ \\x=23\ units$

Part 3) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

so

In this problem

$\frac{AB}{CD}=\frac{AE}{ED}$

substitute the values

$\frac{10}{4}=\frac{2x+10}{x+3}$

$2.5(x+3)=2x+10$

$2.5x+7.5=2x+10$

$2.5x-2x=10-7.5$

$0.5x=2.5$

$x=5\ units$

$AE=2x+10=2*5+10=20\ units$

Part 4) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

so

In this problem

$\frac{4}{5}=\frac{5}{x}\\ \\4x=5*5\\ \\ x=25/4\\ \\ x= 6.25\ units$

Part 5) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

so

In this problem

$\frac{30}{x}=\frac{45}{40}\\ \\45x=30*40\\ \\x=1,200/45\\ \\ x=26.67\ in$

3 0

3 years ago

Read 2 more answers

What is the value of the expression 2 over 3 subtracted by 5 over 6 divided by 3 over 4

Tju [1.3M]

I did the problem and I got negative 4 over 9

5 0

3 years ago

Read 2 more answers

For test Please Help!!!

jonny [76]

Answer:

x=24.621

Step-by-step explanation:

tan(72)=x/8

tan(72)×8=x

x=24.621

4 0

3 years ago