Factorise x2 + 5x - 84

Answer:

54π

Step-by-step explanation:

The volume for a cone is πr²h/3, which if we replace the number in, we get :

π6²4,5/3, which is approximately 54π

Hope it helps :)

Answer:

Shirt:8 ; jsans:16.

Step-by-step explanation:

Let’s shorten these terms: shirt=s ; jean=j.

3s+3j=72

4s+2j=64 => =2j=64-4s => j=(64-4s):2 => j=32-2s

3s+3j=72 => (instead of j we write 32-2s=> 3s+3*(32-2s)=3s+96-6s=72

=> -3s=72-96
-3s=-24

s=24:3

s=8.
=> j=32-2s => j= 32-16 => j=16.

Answer:

30n^15

multiply exponents add reg numbers

Answer: 6.75x - 4

Step-by-step explanation:

6.75x - 4

Answer: 140

Step-by-step explanation:

We know that the angle measures must add to 180 deg, so:

40 + x = 180

x = 140.

Answer:

7,912.8 inch³ of aluminum is needed to make 70 metal balls

Step-by-step explanation:

r = 3 inches and π = 3.14

single aluminum ball, 113.04 inch³ of aluminum

113.04 inch³ of aluminum is used for 1 ball, then we multiply 70 with this value to determine the aluminum needed for 70 such balls.

bc Answer: They form an obtuse triangle

Step-by-step explanation:

the length of one side must be greater than the difference and less than the sum of the lengths of the other two sides. In this case the third side must be greater than 3 and less than 31. 3(squareroot) 55 is 22.25 so it fits.

Answer:

The simplified fraction is

[tex] \frac{2}{9} [/tex]

Step-by-step explanation:

Finding the HCF can help a great deal, so in this case the HCF between 16 and 72 is 8.

16/8 = 2

72/8= 9

Therefore the answer is

[tex] \frac{2}{9} [/tex]

The sum of triangle angles = 180

180 = 90 + 2x +15 + x

75 = 3x

x = 25

Answer:

→x=25°

Step-by-step explanation:

→2x+15+x+90°=180°[Sum of a triangle is 180]

→3x+105°=180°

→3x=180°-105°

→x=75°/3

→x=25°

Hope it will help you.

Answer:

11

Step-by-step explanation:

140-129=11

Answer:

140 - 129

Step-by-step explanation:

If Alyanna has more cookies than Alyssa, and we want to find how much more, we need to subtract Alyssa's amount from Alyanna's amount

Therefore, Alyanna has 11 more cookies than Alyssa.

Answer:

36

Step-by-step explanation:

Hi there!

We want to find the least common multiple (LCM) of 12 and 18

One easy way to do that is to split up the numbers into one of their factor pairs, find the factor pairs between the numbers we just split apart, and then keep on going, until we only get prime numbers (numbers that only have 1 and itself as multiples)
Let's start with 12.

There are multiple ways to multiply to get to 12, but we can use 3 and 4 for example

12= 3*4

4 is 2 * 2  

Substituting 2*2 for 4, 12 is equal to 2*2*3

Now for 18.

18 can also be split up multiple ways; one way would be 9 and 2

18 = 2*9

9 is 3*3

Substitute 3*3 for 9.

18=2*3*3
Now look at 2*2*3; 2 shows up twice in that string of numbers

In 2*3*3, 3 shows up twice in that string of numbers

We multiply the numbers based off of the highest number of times that they occur
In other words, we will multiply 2 * 2  and 3 * 3 together
2 * 2 * 3 * 3 = 4 * 9 = 36
The LCM of 12 and 18 is 36

Hope this helps!

See more on finding the LCM here:
https://brainly.com/question/20380514

Answer:

28. add them all together

Answer:

the answer is 28

Step-by-step explanation:

you have good taste in music

Answer:

18

Step-by-step explanation:

62% of 29

[tex]\frac{62}{100}* 29[/tex]

[tex]0.62 * 29[/tex]

[tex]17.98[/tex]

[tex]18[/tex] .....best estimate if rounded off.

Answer:

18 is the answer

Answer:

D

Step-by-step explanation:

i did the math

Answer:

The answer is 180.20

Have a great day!

Answer:7351

Step-by-step explanation:

Answer:

456566654

Step-by-step explanation:

Answer:

70%

Step-by-step explanation:

Correct/total questions --> Formula for this problem

Correct questions - 7

Total questions - 10

So, 7/10=70%!

Hope this helps you!

Answer:

m • v^2 / 2  = E

Step-by-step explanation:

m = 2E/v^2

multiply each side by v^2

m • v^2 = 2E

divide each side by 2

m • v^2 / 2  = E

Answer:

c

Step-by-step explanation:

Step-by-step explanation:

Typical speed of Bernard= x km/hr

Bernard's speed while sick= 41.5 km/hr

the difference in the speed=13.5 km/hr

the equation representing the difference will be:

x-41.5=13.5 km/hr

Answer/Step-by-step explanation:

1. x = -3.6

Add 1 on both sides.

18x = 23x + 18

Subtract 23x on both sides.

Combine like terms.

Divide the answer.

-5x = 18

x = -3.6

2. x = 11/3 (2.66666...)

Add 5 on both sides.

6x = 3x + 11

Subtract 3x on both sides.

Combine like terms.

Divide the answer.

3x = 11

x = 11/3

3. x = 23

Subtract 12 on both sides.

5x = 6x - 23

Subtract 6x on both sides.

Combine like terms.

Divide the answer.

-x = -23

x=23

(that's all.)

Answer:

780¢

Step-by-step explanation:

A dozen = 12

so 12 * 65 = 780

Answer:

The answer is 780¢

Step-by-step explanation:

Now, we know that 1 dozen = 12

So,

65 × 12 = 780

Thus, The cost of 1 dozen of peaches is 780¢

-TheUnknownScientist 72

Answer:

Q

Step-by-step explanation:

As it's distance versus time graph

Hence Q is the answer

[tex]\sf \Large \boxed{\sf Q} \\\\ In \ a\ distance-time\ graph,\ the\ horizontal\ line\ represents\ an\ object\ at\ rest.\\A \ slope\ shows\ that\ it\ is\ moving.[/tex]

Answer:

x²-25=?

Step-by-step explanation:

x² is known as a positive number.A positive number is any number more than 0

so we can there fore assume it's 4 so 4-25 no we can't so we divide

4÷25=0.16 it is a decimal.

Answer:

He flew for 3 hours

Step-by-step explanation:

in this question we can use the formula :

[tex] \boxed{t = \frac{s}{v}} [/tex]

t is time

s is distance

v is Speed

_________________

We know that :

v = 12 miles/hour

s = 36 miles

So :

[tex] t = \frac{s}{v} = \frac{36}{12} [/tex]

[tex] \boxed{t = 3 \: hours}[/tex]

______________________

Answer:

10minutes per meter

Explanation

⅘meters can be filled in 8 minutes

⅘m => 8minutes

1m => ?

(8 x 1) ÷ ⅘

8 x 5/4 = 10 minutes

Therefore, 1meter can be filled in 10minutes

Answer:

Quesnel Lake:Lake Baikal=.31

Quesnel Lake:Great Slave Lake=.82

Step-by-step explanation:

1 foot = .3048 meters

Lake Baikal: 5369 ft. = 1636.4712 m

Great Slave Lake: 2015 ft. = 614.172 m

Quesnel Lake: 506 m

Quesnel Lake:Lake Baikal

[tex]506 \div 1636.472 = .31[/tex]

Quesnel Lake:Great Slave Lake

[tex]506 \div 614.172 = .82[/tex]

Answer:

135 cm

Step-by-step explanation:

[tex] \cos(43) = \frac{75}{y} [/tex]

[tex]y = \frac{75}{ \cos(43) } [/tex]

[tex]y = 135[/tex]

Answer:

y ≈ 102 cm

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos43° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{75}{y}[/tex] ( multiply both sides by y )

y × cos43° = 75 ( divide both sides by cos43° )

y = [tex]\frac{75}{cos43}[/tex] ≈ 102 cm ( to 3 sf )

Answer:

i guess it is 3a^3-20a^2+16a-24