3

Mathematics

2 answers:

ValentinkaMS [17]3 years ago

8 0

Answer:

Step-by-step explanation:

i looked at your repost but couldn't answer there for some reason

anyhow yeah it's C

Stels [109]3 years ago

3 0

Where’s the parabola?

You might be interested in

What is the sum of all even numbers 0-175 in algebraic form? If n49=99

Mila [183]

Answer:

$S_{88}=7656$

Step-by-step explanation:

We want to find the sum of all even numbers from 0 to 175.

The series will be:

$0+2+4+6+...+174$

The explicit formula for this is $a_n=2n-2$ , where $n\ge1$ .

We need to find how many terms are there.

$2n-2=174$

$2n=176\\n=88$

The sum of terms is given by:

$S_n=\frac{n}{2}(a_1+l)$

Substitute n=88, $a_1=0$ and l=174 to get:

$S_{88}=\frac{88}{2}(0+174)\\S_{88}=44*174\\S_{88}=7656$

7 0

4 years ago

Yo if you can help me I'll give brainliest.

Luden [163]

Answer: x = 5; y = -5

$\left \{ {{-7x-3y=-20} \atop {3x+6y=-15}} \right. \\\\\left \{ {{-7x-3y=-20} \atop {x+2y=-5}} \right. \\\\\left \{ {{-7(-5-2y)-3y=-20} \atop {x=-5-2y}} \right. \\\\\left \{ {{35+14y-3y=-20} \atop {x=-5-2y}} \right. \\\\\left \{ {{11y=-55} \atop {x=-5-2y}} \right. \\\\\left \{ {{y=-5} \atop {x=5}} \right.$