3 years ago

I NEED HELP FAST!! can someone please answer these questions for me!

Mathematics

2 answers:

nasty-shy [4]3 years ago

7 0

Answer:

error in step 1

Step-by-step explanation:

$\frac{1}{2}$ (x + 18) = 4(2x - 6) - 9x

Multiply through by 2 to clear the fraction

x + 18 = 8(2x - 6) - 18x

[ Eleanor made the error in not multiplying - 9x by 2 ] ← ←

x + 18 = 16x - 48 - 18x

x + 18 = - 2x - 48 ( add 2x to both sides )

3x + 18 = - 48 ( subtract 18 from both sides )

3x = - 66 ( divide both sides by 3 )

x = - 22

elixir [45]3 years ago

5 0

Answer:

i dont know im sorry , give me 10 minites

Step-by-step explanation:

You might be interested in

The slope of a line is -1/5 and the y intercept is 5. What is the equation of the line written in slope-intersept form?

vagabundo [1.1K]

Y = -1/5 + 5 is the equation

6 0

3 years ago

Read 2 more answers

Select the least common multiple of 12 and 15. A. 3 B. 15 C. 60 D. 180

ad-work [718]

Answer:

Step-by-step explanation:

12=2⋅2⋅3

15=3⋅5

We see that they both share 3 is their LCM.

We divide each number by their LCM.

123⇒4

153⇒5

We multiply these two quotients and the LCM to get our final answer:

3⋅4⋅5=60

That is our answer!

Hope this helped! :)

7 0

3 years ago

Solve for a side in right triangles help

Pani-rosa [81]

Answer:

The length of AB is 7.45 units.

Step-by-step explanation:

You can find the length of AB using Cosine Rule, cosθ = adj./hypo. :

θ = 20°

adj. = 7 units

hypo. = AB

cos 20° = 7/AB

AB = 7/cos 20°

= 7.45 units (3s.f)

7 0

3 years ago

Read 2 more answers

Ethan burns 650 calories when he runs for 1 hour. Soppose he runs 5 hours in one week

alex41 [277]

650 x 5=3250 calories

3 0

3 years ago

A rectangular garden plot measures 9 m by 5 m. Chillies are planted in a rectangular area of the garden that measures 4.5 m by 2

Katena32 [7]

Answer:

20% of the garden is in chillies.

Step-by-step explanation:

$\frac{4.5 \times 2}{9 \times 5} = \frac{9}{45} = \frac{1}{5} = 20\%$

6 0

2 years ago