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4 years ago

PLEASE PLEASE PLEASE HELP I NEED IT What is the sum of the series?

Mathematics

1 answer:

JulsSmile [24]4 years ago

7 0

Formula :

$n\left(a_1+\frac{d\left(n-1\right)}{2}\right)$

Plug in the values :

$20\left(1+\frac{-3\left(20-1\right)}{2}\right) = 550$

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Answer:550
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Assoli18 [71]

Answer:

a. 7:05 am

b. 7:00 am

c. 6:55 am

d. 6:50 am

e. 6:49 am

3 0

2 years ago

Plz help this is due today. Solve each equation

KATRIN_1 [288]

Answer:

a=8

b=1/8

c=2 3/5

b=13/50

7 0

3 years ago

Sean earns 6.70 per hour working after school.He needs at least $155 to buy a new video game.Write an inequality that describes

Scorpion4ik [409]

Answer:

The inequality representing how many hours he should work in order to reach his goal would be

$x\geq 23.14$

where $x$ represents the number of hours Sean works.

Step-by-step explanation:

Hourly earnings of Sean from after school job = $6.70

Let Sean work for $x$ hours in order to earn at least $155.

We will use unitary method to find earning for $x$ hours.

If 1 hour earnings = $6.70

∴ in $x$ hours earnings in dollars would be = $6.70\times x=6.7x$

Now, we know Sean needs at least $155 to buy a new video game.

This means his earnings working $x$ hours must be at least $155.

Thus, the inequality representing how many hours he should work in order to reach his goal would be

$6.7x\geq 155$

Dividing both sides by 6.7.

$\frac{6.7x}{6.7}\geq \frac{155}{6.7}$

$x\geq 23.14$ (Answer)

Thus, Sean should work a minimum of 23.14 hours to earn at least $155.

7 0

3 years ago

Which expressions are equivalent to (5⋅x)⋅3 ? Drag and drop the equivalent expressions into the box. 3⋅(5⋅x)5⋅3+x⋅35⋅(x⋅3)15x5⋅3

aivan3 [116]

Okay, so here are the answers..

1. 3 • (5 • x)

2. 5 • (x • 3)

3. 15x

You're welcome, and I took the test. :T

8 0

4 years ago

Please explain I just started learning this

Digiron [165]

Answer:

x=5

y=7

Step-by-step explanation:

y = x+2 so plug that in the next equation as y

so it be --> 5x+(-4)(x+2)= -3 now use distributive property

(-4 times x)+(-4 times 2)= -4x+-8 replug that back in

5x-4x+-8 = -3 subtract your x

1x = x so ---> x+-8 = -3 now to get rid of -8 we have to add 8 to it

x= -3 but whatever you do to one side u do to the other so u have to add 8 to -3---> so it be x=5

now take that x=5 and plug it in to your first eqaiuton to get y

y=5+2 ---> y =7

6 0

3 years ago