Sally has twice as many dimes as nickels. The total value is $3.50 how many nickels and dimes does she have?

Answers

Answer 1

Answer: d=2n
.05n+.1d=3.5
I multiplied the nickels and dimes by these values because that is their actual monetary value
.05n=3.5-.1d
multiply everything by 20
n=70-2d
d/2=70-2d
.5d+2d=70
2.5d=70
d=28
n=14
so there are 28 dimes and 14 nickels
checking this answer
28 dimes = $2.8
14 nickels = .70
2.8+.7=3.5

Answer 2

Answer: 2n=d
nickel is 0,05 dollars dime is 0.1 dollars
0.05(n)+0.1(2n)=3.5
0.25n=3.5
n=14
d=2(14)=28
hope u can understand

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Solve the inequality
3(3F − 2) > 6F − 4

Answers

3 (3F - 2) > 6F - 4

Expand the left side: 9F - 6 > 6F - 4

Add 6 to each side: 9F > 6F + 2

Subtract 6F from each side: 3F > 2

Divide each side by 3 : F > 2/3 .

Tim says -40°f is equal to -40°c. explain why this is true.

Answers

Let C = degrees Celsius and F = degrees Fahrenheit $C = (F - 32) * (5)/(9)\n\n$ $= (-40 - 32) * (5)/(9)\n\n$ $= (-72) * (5)/(9)\n\n$ $= -(360)/(9) \n\n$ $= -40$

$^(\circ)C=(^(\circ)F-32)\cdot(5)/(9)\n\n^(\circ)C=(-40-32)\cdot(5)/(9)\n^(\circ)C=-72\cdot(5)/(9)\n^(\circ)C=-8\cdot5\n^(\circ)C=-40$

What is 2 + 2? I need help really bad I'm only in the second grade.

Answers

Answer:

Step-by-step explanation:it’s 4 hope this helps

Answer:

4 is the answer hope this helps

Pls someone help me with this question i provided a picture below

Answers

Answer: (x-8)(x+9)

To rewrite the expression in the form (x+a)(x+b), you must factor the expression. First split the equation into two sides. Since 9 times 8 equals 72, we want to figure out how they add to equal 1 (which is the x).
If 9 times -8 equals -72, this works. -8 + 9 = 1. This translates to -8x + 9x = x. This is how we split it.

x^2 - 8x + 9x - 72
(x^2 - 8x) + (9x - 72)
Since x^2 and -8x both share x, factor out x from the parentheses. And since 9x and -72 are both divisible by 9, factor out 9.
x(x - 8) + 9(x - 8)

We can now factor out the common term, x-8. Then the x and 9 outside the parentheses will be combined.
(x-8)(x+9).
This is our answer

Which statements describe the sequence –3, 5, –7, 9, –11, …? Check all that apply. The sequence has 5 terms. The 4th term of the sequence is 9. f(5) = 2 The domain of the sequence is all natural numbers. (4, 9) lies on the graph of the sequence.

Answers

The correct statements are

The 4th term of the sequence is 9.
The domain of the sequence is all-natural numbers
And, (4,9) lies on the graph.

Given that,

The sequence is -3, 5, -7, 9, -11, …...

Based on the above information, the following information should be considered:

The given sequence contains an infinite no of terms. A
Also, the infinite series does have the domain for all natural numbers.
That means the domain of the given sequence should be equivalent to the natural numbers set.
As the 4th term should be 9. So, it is (4,9).
And, the 5th term should be -11 so it should be f(5) = -11.

Therefore we can conclude that the above statements should be considered true.

Learn more: brainly.com/question/18109692

Answer: The correct statements are, The 4th term of the sequence is 9, The domain of the sequence is all natural numbers, and (4,9) lies on the graph.

Step-by-step explanation:

Since, the given sequence, –3, 5, –7, 9, –11, …..

So, we can say that the above sequence has infinite number of terms.

And, we know that the infinite series has the domain of all natural numbers.

So the domain of above sequence = set of all natural numbers.

Since, the 4th term of the sequence = 9

Therefore (4,9) lie on the graph of sequence.

And the 5th term of the function = -11

therefore f(5) = -11

Thus, from the above explanation we can determine the correct statements.

If the discriminant of a quadratic equation is equal to -8, which statement describes the roots?A.) There are two complex roots.
B.) There are two real roots.
C.) There is one real root.
D.) There is one complex root.