MATHEMATICS MIDDLE SCHOOL

Solve 3x2 - x = 10 I need help please!!

Answers

Answer 1

Answer:

Answer:

3x^2 - x - 10 = 0

3x^2 - 6x + 5x - 10 = 0

3x(x - 2) + 5(x - 2) = 0

(3x + 5)(x - 2) = 0

x = -5/3 , 2

Step-by-step explanation:

mark me brainliest please

Answer 2

Answer:

3x² - x = 10

3x² - x - 10 = 0

Δ = b² - 4.a.c

Δ = -1² - 4 . 3 . -10

Δ = 1 - 4. 3 . -10

Δ = 121

There are 2 real roots.

x = (-b +- √Δ)/2a

x' = (--1 + √121)/2.3

x'' = (--1 - √121)/2.3

x' = 12 / 6

x'' = -10 / 6

x' = 2

x'' = -5/3

Related Questions

There are 2 decks of playing cards. A card is drawn from the first deck and it’s colour-red or black is noted. A card is drawn from the second deck and it’s suits- hearts, diamonds, clubs or spades is noted. A) how many different combinations of colour and suits are possible
A trapezoid has an area of 24 square meters. The lengths of the bases of the trapezoid are 5 meters and 7 meters. What is the height of the trapezoid?4 meters144 meters2 meters1 meter
What is the cost of 4 pounds of butter if 2 kilograms cost $3.20
All of the following expressions are equivalent to 12w + 6, except:a.-1(12w - 6) b.(3 + 6w)2 c.6(1 + 2w) d.-1(-12w - 6)
Write a description of how a diagram can help you solve 2×40

7 times what equals 1?

Answers

For this case, the first thing we must do is define a variable.
We have then:
x: unknown number
Doing the multiplication we have:
$(7) (x) = 1$
From here, we clear the value of x.
We have then:
$x = (1)/(7)$
Therefore, we have:
$(7) ( (1)/(7) ) = 1$
Answer:
7 times 1/7 equals 1

Final answer:

The number that, when multiplied by 7, equals 1 is 1/7.

Explanation:

To find out what, when multiplied by 7, equals 1, you can use simple algebra. Let's call the unknown number x. The equation would be:

7x = 1

To solve for x, you need to isolate it on one side of the equation. Divide both sides by 7:

x = 1/7

So, 1 divided by 7 is the value of x. In decimal form, this is approximately 0.142857. In a fraction, it's 1/7.

In summary, when you multiply 7 by 0.142857 (or 1/7), you will get 1 as the result. This is a fundamental concept in mathematics, where division is the inverse operation of multiplication, and dividing by 7 is the same as multiplying by its reciprocal, which is 1/7.

Learn more about Multiplication Division here:

brainly.com/question/29354258

#SPJ6

in the first area model show 3 ninths. in the second area model show 2 sixths show how both fraction can be renamed as the same unit fraction

Answers

the can be renamed by multilying 3x2 and 2x3

Answer:

the can be renamed by multilying 3x2 and 2x3, You can also divide 2 to get the answer :)

What is the surface area of a cube with faces that each have an area of 12 cm2?

Answers

a cube has 6 identical sides
if total surface area is the area of the sides added up
since 1 side=12 cm^2
then 6 sides=12 times 6 cm^2=72 cm^2

the total surface area=72 cm^2

Since a cube has 6 sides, and each side has an area of 12 cm² , just multiply 6 x 12 = 72
the surface area of the cube is 72 cm ².

Round 354,605 to nearest thousand

Answers

Answer

355,000.

Explanation

When rounding numbers we count digits from the right to the left. The first place value from the right is once followed by tens, hundreds, thousands etc.

354,605

5 ⇒ ones

0 ⇒ tens

6 ⇒ hundreds

4 ⇒ thousands

354,605 to the nearest thousands is 355,000.

Answer:

$355,000$

Step-by-step explanation:

We have been given an number $354,605$ . We are asked to round our given number to the nearest thousand.

Upon looking at our given number we can see that the value of the 1st dropped figure that is at hundreds place value, is greater than 5.

Since hundreds place value is 6 or we can see that last three digits are 605, therefore, we will round up our number to nearest thousand as:

$354,605\approx 355,000$

You ran 3 1/2 mi in 3/4 hr your friend ran 1 2/5 mi in 1/3hr which of you ran faster

Answers

"You" ran faster. 3 1/2 mi. turn into 3 5/10 mile. 1 2/5 mi. turn into 1 4/10 mile. 3/4 of an hour is 45 min. 1/3 of an hour is 20 min. Therefore you multiply 1 4/10 times 2 to get 2 8/10 mi. in 40 min. Since your friend needs 5 more min. to be at the same time as you, you divide 20 (1/3 of an hour) by 4. Which gives you 5 minutes. Now, take the 1 2/5 of the mile. and divide that by 4. Which according to Symbolab.com gives you 1/10. Now go back to the beginning, you ran 3 5/10 mi. in 45 minutes. Your friend ran 2 8/10 in 40 min. Now that we know 5 min. equals 1/10 miles, you can add that to your friend. which means she/he ran 2 9/10 mi. in 45 min. In conclusion, you ran farther that your friend in 45 min. "You" ran faster. (:

Final answer:

To determine who ran faster, divide the distance traveled by the time taken for each person and compare their speeds. Your speed is greater than your friend's speed, so you ran faster.

Explanation:

To determine who ran faster, we need to compare their speeds. Speed is calculated by dividing the distance traveled by the time taken. Let's calculate their speeds and compare them: