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3 years ago

How do u solve 21-23

Mathematics

1 answer:

Zepler [3.9K]3 years ago

7 0

the answer is -2 because 21-23 is a negative number

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Solve for x (19x-18) (7x+1) (10x-9)

ExtremeBDS [4]

Answer:

Step-by-step explanation:

Exterior angle property: Exterior angles equals the sum of remote angles

19x - 18 = 7x + 1 + 10x - 9

19x - 18 = 7x + 10x + 1 - 9 {Combine like terms}

19x - 18 = 17x - 8 {Subtract 17x from both sides}

19x - 17x - 18 = -8

2x - 18 = -8 {Add 18 to both sides}

2x = -8 + 18

2x = 10

x = 10/2

x = 5

6 0

3 years ago

GIVING BRAINLY JUST ANSWER CORRECTLY !!

Vinil7 [7]

Answer:

b. never

Explanation:

A fraction is always in the form p/q, where q is not 0; or can be converted in that form (in case of mixed fraction).

A number is said to be irrational, if it cannot be expressed in the form p/q, where q is not 0.

5 0

3 years ago

Two cars left the city for a suburb, 480 km away, at the same time. The speed of one of the cars was 20 km/hour greater than the

Alex_Xolod [135]

The speed of both the cars are 80km/h and 60km/h

Step-by-step explanation:

Let the speed of one car be 'a' and the speed of other car be 'b'.

The total distance (d) = 480km

It is given that the speed of one car is 20km/h faster than the other.

We can write,

a = b+20

The slower car takes 2 hrs more to reach the suburb than the other car.

Let the time taken by the fastest car be t

Speed = distance/time

So,

a = 480/ t

b = 480/(t+2)

We got the values of a and b.

a = b+20

480/t = (480/(t+2)) + 20

Taking LCM on the right side.

480/t = (480 + 20t + 40) / (t+2)

480(t+2) = (480+20t+40) t

480t + 960 = 480t + 20t(t) + 40t

20t(t) + 40t - 960 = 0

Divide the whole equation by 20 to simplify the equation.

t(t) + 2t - 48 = 0

Solve the quadratic equation by splitting the middle terms.

t(t) + 8t - 6t - 48 = 0

t(t + 8) - 6(t + 8) = 0

(t- 6) (t+8) =0

t = 6 (or) -8

t is time and cannot be negative. So t= 6hrs

a = 480/t

a = 480/ 6 = 80

the speed of the fastest car is 80km/hr

a = b + 20

b = a - 20

b = 80 - 20

b = 60km/h

4 0

3 years ago

I need help with this, I know the total would equal 100% but I don’t know what to do...

Sauron [17]

Answer:

320

Step-by-step explanation:

1. Divide the 20 by % (20 / 5)

2. Take that number (People per percent) and multiply x 80.

7 0

3 years ago

A fruit drink company tested a new flavor .In a test 46% of the people talking part liked the new flavor.If 69 people liked the

konstantin123 [22]

Answer:

150 people took the test.

Step-by-step explanation:

Given:

Number of people liked the new flavor = 69

Percentage of people liked the new flavor = 46%

We need to find the number of people who took the test.

Solution:

Let the number of people who took the test be 'x'.

So we can say that;

Percentage of people liked the new flavor multiplied by the number of people who took the test is equal to Number of people liked the new flavor.

framing in equation form we get;

$46\%\times x =69\\\\\frac{46}{100}x=69\\\\0.46x =69$

Dividing both side by 0.46 we get;

$\frac{0.46x}{0.46}=\frac{69}{0.46}\\\\x= 150$

Hence 150 people took the test.

3 0

3 years ago