All categories

3 years ago

Simplify(7x2 + 5) ( x – 3) + 2x( 3x – 4) MUST SHOW WORK

Mathematics

1 answer:

finlep [7]3 years ago

6 0

Answer:

11x + 6x^2 -57

Step-by-step explanation:

(7x2 + 5)(x - 3) + 2x (3x - 4)

1. Multiply 7x2

(14 + 5)(x - 3) + 2x (3x - 4)

2. Add 14+5

(19)(x - 3) + 2x (3x - 4)

3. Distribute 2x to 3x-4

(19)(x - 3) + 6x^2 - 8x

4. Distribute 19 to x-3

19x - 57 + 6x^2 - 8x

5. Simplify.

11x + 6x^2 -57

You might be interested in

I think of a number, double it and add 14. The result is 36. What is the number?

never [62]

Answer:

Step-by-step explanation:

11*2=22, 22+14=36, quick maths

4 0

3 years ago

Read 2 more answers

What is the start time 30 minutes before 10:08am

Zolol [24]

9:36 am (in the morning)

8 0

2 years ago

Read 2 more answers

FREE 50 POINTS AND BRAINLEST FOR THIS QUESTION!!!!!

Lisa [10]

Answer:

It's 2567678/46635777658

4 0

3 years ago

Read 2 more answers

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

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

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

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

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

In this problem

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

3 0

2 years ago

Read 2 more answers

A student believes she can earn between $5200 and $6250 from her summer job. She knows that she will have to buy four new tires

ohaa [14]

Answer:

4180 to 5230$

Step-by-step explanation:

1. Lets find the expenses she has to make -> 4*90+660=1020$(4 new tires + other expenses)

2. As her income is not set strictly we can guess the range she can save(More accurate calculations depends on her strict incomes). We have 5200-1020=4180$(if she gets paid 5200$) and 6250-1020= 5230$(if she gets paid 6250$).

3. So the range of savings vary from 4180 to 5230$$.

4 0

2 years ago