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4 years ago

Help me solve 1 <2n-5 <_7 also please explain

1 answer:

7 0

I'm not sure if that is supposed to be 7 or -7 If it's -7: 1<2n-5<-7 +5 +5 +5 Add 5 to all parts of the inequality get 2n by itself 6<2n<-2 /2 /2 /2 Divide all parts by 2 to isolate the variable 3

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Solve k^2 + 13k + 30 = 0

kogti [31]

K² + 13k + 30 = 0

This is a quadratic equation. Let's attempt solving it by factorization.

Coefficient of k² = 1, last term = 30

Multiply these two together 1*30 = 30

We think of two numbers that multiply to give 30 and add to give the middle term 13.

The two numbers are 3 and 10.

3*10 = 30, 3 + 10 = 13.

we replace the 13k with 3k + 10k

k² + 13k + 30 = 0

k² + 3k + 10k + 30 = 0

k(k + 3) + 10(k + 3) = 0

(k + 3)(k + 10) = 0

(k + 3) = 0 or (k + 10) = 0

k = 0 - 3 or k = 0 - 10

k = -3, or -10

I hope this helps.

4 0

4 years ago

What is the slope of the line y=1

cupoosta [38]

Answer:

See the IMAGE FOR SOLUTION

Brainlost please

4 0

3 years ago

Read 2 more answers

There are 21 students in your class. The teacher wants to send 4 students to the

aliya0001 [1]

Answer:

4/21

Step-by-step explanation:

since we are only talking about the first day, there are still 21 options for your teachers. there are 4 spots that you can fill, so the probability that you will be picked is 4/21

8 0

3 years ago

Anya was rowing up the river and noticed it takes longer to row upstream than downstream. She knows that in still water she can

Alenkinab [10]

If the speed of boat in still water iss 9 mph and takes 1.5 miles to go and come 4 miles uptream and downward then the current of the river is 9.24 mph.

Given that the speed in still water be 9 mph, time to travel 4 miles upstream and downward is 1.5 hours.

We are required to find the speed of current of the river.

let the speed of current be c mph.

Effective speed in downstream=9+c

Effective speed in upstream=9-c

Total time=1.5 hours.

Total distance=4 miles.

Time for upstream stream+ time for downward stream=1.5 hours

2/(9+c)+2/(9-c)=1.5

18-2c+18+2c=1.5(9+c)(9-c)

36=1.5(81- $c^{2}$ )

36=121.5-1.5 $c^{2}$

1.5 $c^{2}$ =121.5-36

$c^{2}$ =85.5

c=9.24 mph.

Hence the speed of the current of the river is 9.24 mph.

Learn more about speed at brainly.com/question/4931057

#SPJ4

4 0

2 years ago

Write an equation to describe the relationship in this table.

Vadim26 [7]

Answer:

y = x+5

Step-by-step explanation:

you cant times it by anything but 1 so x then how much does it go up by 5 so y= x+5

8 0

4 years ago