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3 years ago

Please include all steps on how to solve the problem..... (5x2-3) + (2x2-3x3)

Mathematics

2 answers:

Olenka [21]3 years ago

8 0

(5x2-3) + (2x2-3x3)
(10-3) + (4-9)
(7) + (-5)
2

valkas [14]3 years ago

6 0

Pemdas
parentheses/exponents/multiplication/division/addition/subtraction (always remember this, you will always need it in math)
(10-3)+(4-9)
you multiply 5x2 in the parentheses along with 2x2 and 3x3 because of pemdas. so your equation would look like this
(7)+(-5)
then you would do the subtraction inside of the parentheses
then you would add positive 7 and negative 5 which would give you positive 2
7+-5=2

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Solve the quadratic equation numerically (using tables of x- and y- values). -4x=-x2+12

Levart [38]

-4x=-x2+12 should be written <span>-4x=-x^2+12, with " ^ " representing exponentiation.

You are to invent a table of x values and find the difference between -4x and -x^ 2+12. The smaller the difference, the closer you are to finding the correct root, x.

To get you started:

x -4x x^2+12 difference
--- ------------ ---------------- --------------
2 -8 16 24 (pretty bad!)
-4 16 28 12 (better)
-10 40 112 72 (much worse)

To answer this problem correctly, you must present such a table, even tho' it'd be faster to use the quadratic formula (or some other method) to find x.

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3 years ago

for a fundraiser, Hailey raises $27, plus 1.50 for each lap she swims. Tariana raises $18, plus $3 for each lap she swims what i

borishaifa [10]

Answer:

The number of laps for which two swimmers have raised the same amount of money is 6 .

Step-by-step explanation:

Given as :

The amount raised by Hailey = $27 + $1.50 × each lap she swim

The amount raised by Tariana = $18 + $3 × each lap she swim

Let The number of laps after which both swimmer raised same amount = n

Now, According to question

<u>For both swimmer to raised same amount</u>

I.e The amount raised by Hailey = The amount raised by Tariana

Or, $27 + $1.50 × each lap she swim = $18 + $3 × each lap she swim

Or, $27 + $1.50 × n = $18 + $3 × n

Or, $27 - $18 = $3 n - $1.50 n

Or, 9 = 1.5 n

∴ n = $\dfrac{9}{1.5}$

I.e n = 6

So, number of lap for same amount of both = n = 6

Hence The number of laps for which two swimmers have raised the same amount of money is 6 . Answer

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3 years ago

The ratio of the number of dolls Jacky had to the number of dolls Peter had was 5 : 2 but, after Jacky gave 15 dolls to Peter, t

tester [92]

Answer:

35 [$]

Step-by-step explanation:

1) if Peter's sum is p and Jacky's is j, then the ratio 5:2 in the condition can be written j/p=5/2;

2) the phrase 'after Jacky gave 15 dolls to Peter, they have an equal number of dolls' can be written as j-15=p;

3) using the two above it is possible to make up the system of two equations:

$\left \{ {{\frac{j}{p} =5/2} \atop {j-15=p}} \right. \ = > \ \left \{ {{j=2.5p} \atop {j-15=p}} \right. \ = > \ \left \{ {{j=25} \atop {p=10}} \right.$

4) finally, the have together 10+25=35 doll-s.

8 0

2 years ago

Please help me please

bulgar [2K]

1) p-2
2)10.50
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3 years ago

A falling rock produces a force of 250 Newtons from acceleration due to gravity alone. What is the rock's mass in kilograms? Ent

OlgaM077 [116]

Answer:

Convert 250 Newtons into Kilograms

25.5

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3 years ago