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Shtirlitz [24]
2 years ago
10

Please help will give 100 points and brainleist for a real answer!

Mathematics
2 answers:
babunello [35]2 years ago
8 0

Answer:

420

Step-by-step explanation:

The first positive even numbers are from 2 to 40, so the sum is equal to the number of terms, times the number of terms plus one (20*21 = 420)

Monica [59]2 years ago
5 0

Answer: C, 420

Step-by-step explanation:

The first positive even numbers are from 2 to 40, so the sum is equal to the number of terms, times the number of terms plus one (20*21 = 420)

the sum is 420

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WILL MARK BRAINLIST FOR THE CORRECT ANSWER!!
stellarik [79]

Answer:

answer is A

Step-by-step explanation:

3*2=6

2pi/2=pi

8 0
3 years ago
2x-y=3<br> -x-y=3 <br><br> what does this equal system of equations
Jet001 [13]

Topic : Linear equations in two variables.

Given :

  • 2x - y = 3 ––– (i)
  • - x - y = 3 ––– (ii)

Solution :

Now,

(i) – (ii)

\qquad \sf \: { \dashrightarrow 2x - y - ( - x - y) = 3 - 3}

\qquad \sf \: { \dashrightarrow 2x - y  +  x  + y) = 3 - 3}

\qquad \sf \: { \dashrightarrow 3x = 0}

\qquad \bf \: { \dashrightarrow x = 0}

Now, substituting the value of x in Eq (i) :

\qquad \sf \: { \dashrightarrow 2x - y = 3 }

\qquad \sf \: { \dashrightarrow 2(0)- y = 3 }

\qquad \sf \: { \dashrightarrow 0- y = 3 }

\qquad \bf \: { \dashrightarrow  y =  - 3 }

Therefore,

  • <u>The value of x = 0 and y = -3</u>
3 0
2 years ago
Solve for x <br> Need help asap
vlabodo [156]

Answer:

x=55

Step-by-step explanation:

Corresponding angles of two parallel lines are always equal. The angle on "top" of 2x+6 corresponds with the angle marked as x+9. Therefore, its measure must also be x+9.

Since these two angles form one side of a line which has 180 degrees, we have the following equation:

2x+6+x+9=180

Combine like terms:

3x+15=180

Subtract 15 from both sides:

3x=165

Divide both sides by 3:

x=\frac{165}{3}=\boxed{55}

3 0
3 years ago
Find the diameter of the circle with the given circumference.use 3.14 for pi<br><br> C=23 cm
zvonat [6]

Answer:

7.324840764

Step-by-step explanation:

23/3.14=7.324840764

7 0
3 years ago
1 of what number is 7
Kamila [148]
I hope this helps you



1=?.7


?=1/7
3 0
3 years ago
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