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3 years ago

I need help.Don’t post any link i’m not going to download them

Mathematics

1 answer:

Romashka-Z-Leto [24]3 years ago

8 0

Answer:

without link we cant help you if you want you can see the link

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I need help with these 2 questions

tensa zangetsu [6.8K]

Number 1 would the last option, but I’m not sure about number 2

7 0

3 years ago

1. Solve the following inequality -2(x - 4) > -10. I need this with Work shown pls

Rina8888 [55]

Answer:

X<9

Step-by-step explanation:

-2(x-4)>-10

-2x+8>-10

-2x>-18

x<9, the sign flips since you are dividing with a negative

3 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

Pierce currently has $10,000. What was the value of his money five years ago if he has earned 5 percent interest each year?

tia_tia [17]

The first answer is correct, if you go back by 5% each year you will see that.

4 0

3 years ago

Read 2 more answers

The following mapping statements describe the transformation of the vertices of △ABC to the vertices of its image, △A′B′C′. A(0,

victus00 [196]

Answer:

C. a reflection in the y-axis

Step-by-step explanation:

The mapping statement for the transformation of the vertices of the triangle ABC is given as following:

A(0,2)→A'(0,2)

B(2,9)→B'(-2,9)

C(4,2)→C'(-4,2)

To find the correct transformation for the given statement.

Solution:

From the given statements, the general transformation statement for the the vertices of the triangle can be given as:

$(x,y)\rightarrow (-x,y)$

The above transformation shows a reflection in the y-axis as the transformation in y-axis changes the sign of the x-coordinate of the point.

5 0

4 years ago