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Karo-lina-s [1.5K]
3 years ago
9

What is the some of the counting numbers from 1 to 80?

Mathematics
1 answer:
kumpel [21]3 years ago
7 0
There is a formula for adding consecutive numbers:
total = n*(n+1)/2
total = 80*(81)/2
total = 3,240

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Find the value of the expression 2x2 - 4x2 + 7x – 7 if x= 3. What is the value if x = 2?
vichka [17]

Answer:

if x= 3, so it's 32  if x= 2, so it's 7

Step-by-step explanation:

5 0
3 years ago
Which point has the coordinate –0.4?
Sphinxa [80]
The best and the most correct answer among the choices provided by the question is the fourth choice. K has a coordinate of -0.4. I hope my answer has come to your help. God bless and have a nice day ahead! Feel free to ask more questions. 
8 0
3 years ago
BRAINLIEST AND FIVE STARS TO CORRECT ANSWER
Llana [10]
The answer is the first option, <-20, -42>.

We can find this by first finding what -2u would equal by multiplying <5, 6> by -2. This gives us <-10, -12>.

Then we need to find out what 5v is equal to, by multiplying <-2, -6> by 5 to get <-10, -30>.

Now that we know what -2u and 5v are, we can substitute them into the equation and get
<-10, -12> + <-10, -30>, which we can split up into -10 - 10 = -20, and -12 - 30 = -42, so your final answer is <-20, -42>.

I hope this helps!
8 0
3 years ago
the perimeter of a basketball court is 284 ft. the length is 40 ft longer than the width. find the dimensions of the court.
mrs_skeptik [129]
284=2x+2(x+40)
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dimensions 51 ft by 91ft
7 0
3 years ago
Read 2 more answers
Y = 7/8u + 9, solve for u
vivado [14]

Answer:

u=\frac{8y-72}{7}

Step-by-step explanation:

Flip the equation.

\frac{7}{8}u+9=y

Add -9 to both sides

\frac{7}{8}u+9(-9)=y(-9)

\frac{7}{8}u=y-9

Divide both sides by 7/8

u=\frac{8y-72}{7}

hope this helps

3 0
4 years ago
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