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blsea [12.9K]
3 years ago
6

I’ve done this before and I got it right, but sadly I forgot how to do it :( does anyone know how to solve ?

Mathematics
1 answer:
Brrunno [24]3 years ago
7 0
Solve the system if equations by subtracting:
We get 5L = 45
L = 9

Substituting for L in s = 20L + 75 gives s = 255
So the second choice I the correct one
You might be interested in
I need help please. Also check out my other question
siniylev [52]

Answer:

<h3><u>8 Km.</u></h3>

Explanation:

  • I'm going to turn the fractions into decimals

2 ½: 2.5

3 ⅕: 3.2

  • Formula for the area of a parallelogram: A = b(h)

Base: 3.2

Height: 2.5

3.2 · 2.5 = 8

<h3><u>The area of the parallelogram is 8 Km.</u></h3>
5 0
3 years ago
What is 1.6 in fraction form?
viva [34]
As an improper fraction, it is \frac{8}{5}. 
5 0
4 years ago
Would like this problem broken down step by step thanks!
antiseptic1488 [7]

Answer:

m=12

Explanation:

Given any quadratic function, y=ax²+bx+c.

We can determine the nature of the roots of such quadratic function by examining the discriminant, D where:

D=b^2-4ac

• If D>0, the roots are real and unequal.

,

• If D=0, the roots are real and equal.

,

• If D<0, the roots are complex.

In our given equation:

\begin{gathered} y=18x^2+mx+2 \\ a=18,b=m,c=2 \end{gathered}

For the function to have exactly one zero, the value of D=0.

\begin{gathered} D=b^2-4ac=m^2-4(18)(2)=m^2-144 \\ D=0\implies m^2-144=0 \\ Add\text{ 144 to both sides.} \\ m^2=144 \\ Take\text{ the square root of both sides} \\ \sqrt{m^2}=\sqrt{144} \\ m=12 \end{gathered}

The value of m for which the function will have one zero is 12.

4 0
1 year ago
Cruz wanted to buy 3 albums that cost $14.49 each. He said the total would be about $45. his sister Jessica said the total would
pav-90 [236]

Answer:


Step-by-step explanation:

A. Cruz rounded the price up to $15

so 15x3=$45

his estimate will be higher as he rounded up

B. Jessica rounded down to $14

so 14x3=$42

her estimate will be lower as she rounded down

5 0
3 years ago
Identify the factors of the terms of the expression of 13m-2n
Alex Ar [27]
Hi it is 7n I hope I was right
4 0
3 years ago
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