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4 years ago

PLZ HELP ME!!!!!!!!!! ASAP!!!!!!!!! I WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Marta_Voda [28]4 years ago

3 0

Answer:

the answers are

3. 18 m

4. 30.8 cm

5. 8m

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Find the products.please please please please please help me! I’m desperate!

Dmitry_Shevchenko [17]

Answers:

5) product is $35ax^2 - 42axy + 7y^2$

6) product is $-a^6b^2 - 8a^5b - 5a^4$

7) product is $12x^5y + 6x^4y^2 + 21x^3y^3$

8) product is $3x^3y^2 - 6x^3y + 3x^5y - 3x^4y$

9) product is $x^{3n} + 7x^{n+1} - 3x^n$

=============================================

Explanation:

For each of these questions, you'll multiply the term outside by each term inside the parenthesis. I'm using the distributive property.

In problem 5, we multiply the outer 7a by the following terms inside like so

$7a(5x^2-2xy+y^2-4xy)\\\\7a(5x^2-6xy+y^2)\\\\7a(5x^2)+7a(-6xy)+7a(y^2)\\\\35ax^2-42axy+7ay^2\\\\$

The other problems will have similar steps.

--------

A useful rule to keep in mind is that $a^b*a^c = a^{b+c}$

For example, $x^2*x^3 = x^{2+3} = x^5$

3 0

3 years ago

The Jammers basketball team had a

goldfiish [28.3K]

Answer:

5 Games

Step-by-step explanation:

Step 1: State what is known

We know for every 5 games the win they lose 1 game

They won 5 games

Step 2: Define your variables

Let x represent how many games the Basketball team lost

Step 3: Create equation

$\frac{5}{1}=\frac{25}{x}$

Step 4: Solve for 'x'

Cross multiply to solve for 'x'

$5x=25$

$x=\frac{25}{5}$

x = 5

Therefore the will have lost 5 games

7 0

4 years ago

Leroy took a total of 10 pages of notes during 5 hours of class. In all, how many hours will Leroy have to spend in class before

Ivanshal [37]

Answer:

20:10 10 hours

Step-by-step explanation:

10:5 * 2 = 20:10 or 10:5 / 5 : 2:1 * 20 = 20:10

4 0

3 years ago

Brian is going to buy his first home for $220,000. He has to put $22,000 down. He needs to spread the payments over 180 months t

MAXImum [283]

Answer:

<u>Use the forumula</u>

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Payment = P(r/n)(1+r/n)nt/((1+r/n)nt-1)

For this case nt = 180, r/n = 0.035/12 and P = 220,000 - 22000 = 198000

(1+r/n)180 = 1.00292180 = 1.6892

Payment = 198000(0.00292)(1.6892)/0.6892 ≈ $1415.46

5 0

3 years ago

A square steel bar has a length of 7.4 ft and a 2.9 in by 2.9 in cross section and is subjected to axial tension. The final leng

svetlana [45]

Answer:

Poission Ratio = 0.2784

Step-by-step explanation:

we know that

Poission ratio is defined as

μ = $\frac{-lateral strain}{longitudinal strain}$

We also know that lateral strain = $\frac{Final width-Initial width}{Initial Width}$

In our case

Final width = 2.89945 in

Initial width = 2.9 in (Area of cross section (width x depth) = 2.9 in x 2.9 in)

Thus lateral strain = $\frac{2.89945-2.9}{2.9}$

Lateral strain = $-1.8965X10^{-4}$

Similarly longitudinal strain = $\frac{Final Length-Initial Length}{Initial Length}$

Thus longitudinal strain = $\frac{7.40504ft-7.4ft}{7.4ft}$

Longitudinal strain = $6.8108X10^{-4}$

Thus by formula poission ratio = $\frac{-(-1.8965X10^{-4}}{6.8108X10^{-4}}$

Poission Ratio = 0.2784

3 0

4 years ago