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stepladder [879]
3 years ago
14

Vedanta Excel In Opt. Mathematics - Book 9

Mathematics
1 answer:
givi [52]3 years ago
6 0
<h2> (1 ,2) (2,-3)</h2><h2>(x1,y1) (x2, y2)</h2>

<h2> Distance formual</h2>

<h2> √(x2-x1)^+(y2-y1)^</h2>

<h2>= √(2-1)^+(-3-2)^</h2><h2>= √(1)^+(-5)^ [here square root and </h2><h2> square get cancelled]</h2><h2>= (1)+(-5)</h2><h2>= 1-5</h2><h2>= - 4</h2>
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Twice x, plus 7, is the same as – 10.<br> The answer is N
sergij07 [2.7K]

Answer:

x=-8.5.

Step-by-step explanation:

First, write an equation. Twice x (2x) plus 7 (+7) is the same as (=) negative ten (-10), or 2x+7=-10. To solve, first subtract 7 from both sides to get 2x=-17. Then, divide both sides by 2 (x=-8.5).

3 0
3 years ago
How many<br> roots does the relation y = 4x² - 20x + 25 have? (2 marks)
Dovator [93]

Answer:

it has one root x=2/5

Step-by-step explanation:

7 0
2 years ago
James has $5.00 more than three times what Catherine has. Together they have $41.00. How much does each student have?
Tpy6a [65]
Hey.

acc'g to the conditions :

Let Catherine has x
and James has 5 + 3x

Then,

5 + 4x = 41 \\ \\ \implies 4x +5 -5 = 41-5 \\ \\ \implies 4x = 36 \\ \\ \implies x= \dfrac{36}{4} \\ \\ \implies x = 9

Hence

• Catherine has = x = $9,
• and James has = 5 +3x = 5 + 3(9) = $32

Thanks.
7 0
2 years ago
Mari has a part time job. She earns $6 an hour. She makes at most $207.00 a week. What is the greatest number of hours that she
sergejj [24]

Answer:

If Mary earns 7$ an hour, we need to multiplicate 7$ by the number of hours worked for the entire week so we can get the salary per week.

Step-by-step explanation:

it's correct

8 0
3 years ago
Given that a­­b = x, evaluate the following: ab+2
Semmy [17]

Answer:

x+2

Step-by-step explanation:

replace ab with x

4 0
3 years ago
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