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Darina [25.2K]
3 years ago
8

Solve the quadratic equation x2−5x=−20 by completing the square.

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
5 0

Answer:

x = \frac{5}{2} + \sqrt[i]{55}/2

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What's the ratio if you have 3.5 to 17
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=3.5:17
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4 years ago
Question 1: A store pays $50 for a pair of shoes. The markup is 25%.
ehidna [41]

Answer:

1) selling price is $62.50 and 2) total cost would be $66.25

Step-by-step explanation:

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3 years ago
A new auditorium is begging built for a college the balcony has 200 seats the floor has 25 rows with x seats in each row the num
aliya0001 [1]

Question:

A new auditorium is being built for a college. The balcony has 200 seats. The floor has 25 rows with x seats in each row. The number of people in the auditorium must be under 750 to meet safety regulations. What is the solution of this inequality, and what is its meaning?​

Answer:

200 + 25x < 750

Number of seats in a row must be less than 22

Step-by-step explanation:

Given

Total = Less than 750

Current Seats = 200

Rows = 25

Seat per row = x

Required

Represent as an inequality

The scenario will be represented as:

Current\ Seats + Rows * x = Total

Substitute 200 for Current Seats

200 + Rows * x = Total

Substitute 25 for Rows

200 + 25* x = Total

200 + 25x = Total

Substitute <750 for Total.

The equation then becomes

200 + 25x < 750

Solving further:

25x < 750 - 200

25x < 550

x < \frac{550}{25}

x < 22

This means that:

Number of seats in a row must be less than 22

3 0
3 years ago
Abner wants to create a shopping budget where he spends less than $80 per month on clothes. He also wants to spend at least thre
strojnjashka [21]

Answer:

D) Abner can spend $60 per month on school clothes and $20 per month on gym clothes and stay within his budget.

Step-by-step explanation:

In the problem it states that Abner will spend 3 times more on (s)school clothes than (g) gym clothes.

So it would appear as s ≥ 3g.

If we plug in $60 as s (school clothes) and $20 as g (gym clothes), the statement is true.

60 ≥ 3(20)

60 ≥ 60. These numbers make the linear system true.

If you have trouble with this, an easy way to find this answer is simply creating the linear system that represents the problem, (he will buy 3 times more school clothes than gym clothes) s ≥  3g and plug in each variable from the answer choices until you find the variables that make the linear system true.


6 0
3 years ago
Read 2 more answers
Last year, 50 students attended the winter carnival. This year, 60 students attended the carnival. Which statement below correct
SVETLANKA909090 [29]

Answer: 20% increase

Step-by-step explanation:

change/ original number

(60 - 50 / 50) x 100 = 20

20%

5 0
3 years ago
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