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3 years ago

Expand the following expressions by multiplying out the brackets -4(4f+3)

Mathematics

2 answers:

melisa1 [442]3 years ago

6 0

Answer:

- 16f - 12

Step-by-step explanation:

- 4(4f + 3) ← multiply each term in the parenthesis by - 4

= - 16f - 12

ruslelena [56]3 years ago

5 0

Hello!

In order to simplify this expression, we should use the Distributive Property and distribute -4:

-4(4f+3)

-16f-12

Note:

$\square$ A negative times a negative is a positive.

Hope everything is clear.

Let me know if you have any questions!

#KeepOnLearning

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The drama club at Math Academy High School sold tickets to their end of the year play. On Monday they sold 80 tickets for a tota

riadik2000 [5.3K]

Answer: OPTION A

Step-by-step explanation:

Let be "a" the number of adults tickets they sold and "s" the number student of tickets they sold.

With the information given in the exercise you can set up the following System of equations:

$\left \{ {{a+s=80} \atop {6a+4.5s=426}} \right.$

Use the Elimination method to solve the system of equations:

1. Multiply the first equation by -6.

2. Add the equations.

3. Solve for "s" in order to find its value.

Then:

$\left \{ {{-6a+-6s=-480} \atop {6a+4.5s=426}} \right.\\............................\\-1.5s=-54\\\\s=36$

4. Finally, substitute the value of "s" into the first equation and solve for "a":

$a+36=80\\\\a=80-36\\\\a=44$

3 0

4 years ago

Sinmplify the expression -3(-5y+2)-(8y-3)<br> a) 7y-3<br> b)7y-9<br> c)23y-3

raketka [301]

Answer:

a) 7y - 3

Step-by-step explanation:

$- 3( - 5y + 2) - (8y - 3)$

$15y - 6 - (8y - 3)$

$15y - 6 - 8y + 3$

$7y - 6 + 3$

$\boxed{\green{ = 7y - 3}}$

8 0

3 years ago

Read 2 more answers

There is £80 in a pot which is shared out amongst 3 people. Anne gets £20 Mark gets £35 and Ben gets £25. What ratio of the mone

faltersainse [42]

Ratio of Anne : Mark : Ben = 20 : 35 : 25
= 4 : 7 : 5 ( total 16 parts )

Anne = 4/16 x £80 = £20

Mark = 7/16 x £80 = £35

Ben = 5/16 x £80 = £25

6 0

2 years ago

A pair of kids and a pair of adults decided to compete in a three-legged race. The kids got to start 4 yards ahead of the adults

andrew-mc [135]

Use the y=mx+b Format

4 0

3 years ago

The diameter of Jen’s bicycle tire is 30cm. About how many revolutions will her tire make in a 20,000 cm journey?( Use pi =3.14

Verdich [7]

Answer:

213

Step-by-step explanation:

The circumference of the wheel is given by

C=2πr=πd

Where d is diameter, r is radius and c is circumference

The number of revolutions N multiplied by circumference should yield the total distance

N*πd= Distance

Given distance of 20, 000 cm and diameter of 30 cm

30πN=20000

Making N the subject of formula

N=20000/(30π)=212.20659078919378102517835116335248271261

Rounded off, about 213 revolutions are required

3 0

3 years ago