What value of (n) makes the equation true ? -2(n)+1.8=3.2 A. -0.7 B. 0.7 C. -3.4 D -2.5

Answers

Answer 1

Answer:

The value of (n) that makes the equation true is -0.7, which corresponds to option A.

To find the value of (n) that makes the equation -2(n) + 1.8 = 3.2 true, we need to isolate (n) on one side of the equation.

Step 1: Begin by subtracting 1.8 from both sides of the equation to move the constant term to the right side.

-2(n) = 3.2 - 1.8

-2(n) = 1.4

Step 2: Now, divide both sides of the equation by -2 to solve for (n).

n = 1.4 / -2

n = -0.7

The value of (n) that makes the equation true is -0.7, which corresponds to option A.

In conclusion, by properly solving the equation step-by-step, we find that (n) equals -0.7, verifying that it satisfies the equation -2(n) + 1.8 = 3.2.

To know more about equation:

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Answer 2

Answer: The answer is A -0.7
-2(n) + 1.8 simplifies to:
-2n + 1.8 = 3.2
- 1.8 -1.8
-2n = 1.4
n = -7

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A bag contains 4 pennies, 6 nickels, and 10 dimes. What is the probability of randomly selecting a nickel or dime from the bag?

Answers

16 out of 20 (simplified is 4 out of 5) or 80%

There are 20 coins total and 16 of them are nickels AND dimes so...
16/20=> 4/5
80%
0.8

A recipe takes 90 minutes to make. 25 percent of the time is spent preparing the ingredients. How many minutes are spent preparing...

Answers

Answer

Find out the how many minutes are spent preparing.

To proof

As given

A recipe takes 90 minutes to make.

25 percent of the time is spent preparing the ingredients.

25% is written in the decimal form

$= (25)/(100)$

= 0.25

Time spent in preparing = 0.25 × 90

= 22.5 minutes

Therefore the 22.5 minutes are spent preparing the ingredients.

Hence proved

22.5 minutes, or 22 minutes and 30 seconds. In order to find the answer, you would have to multiply 90 by 25%, which can be converted to 0.25 to make multiplying easier. Hope this helps!

An employee earned $56,700.00 in a year and had $8,788.50 withheld for federal income tax. What federal income tax percent was withheld? if necessary, round your answer to the nearest hundredth of a percent. (Hind: write out a verbal sentence of what you are trying to find, then turn into a mathematical equestion to solve)Show your setup as well as answer.

Answers

so earned 56,700 in a year and had 8,788.5 held back
convert to percent

so find what percent was withhelald which is (amount held back)/(total taken from)
so it would be 8,788.5/56,700=0.155/1
percent means parts out of 100 or x/100=x% so convert the bottom number ot 100 by mulitplyint the whole fraction by 1 or 100/100 so
0.155/1 times 100/100=15.5/100=15.5%
the answer is 15.5%

The paper cup would not roll straight. One end was 7 cm In a diameter, and the other end was 5cm in diameter. In one roll of the cup, A. How far would the larger end roll?
B. how far would the smaller end roll?
(Round each answer to the nearest centimeter. Use 3.14 for pi)

Answers

You need to find Circumference of each circle so the top is 7cm and the bottom is 5cm
C = pi • diameter
So top is 3.14 • 7 = 21.98
And bottom is 3.14 • 5 = 15.70
Need any more help?

Complete the following proof.Given: m ∠XOY = m ∠WOV
m YZ = m ZW
Prove: m XZ = m ZV

Answers

Answer:

Step-by-step explanation:

m ∠XOY = m ∠WOV

so, m XY = m WV --- (i)

{ If angle subtended by two arcs at the center are equal, then length of arc are equal}

m YZ = m ZW ------- (ii) {given}

Add (i) and (ii)

XY + YZ = WV + ZW

XZ = ZV

Hence proved.

Answer:

Given that m ∠XOY = m ∠WOV then m XY = m WV, because central angles are equal to arcs.

Given: m YZ = m ZW

The addition of arcs XY and YZ make arc XZ, that is: m XY + m YZ = m XZ

The addition of arcs ZW and WV make arc XZ, that is: m WV + m ZW = m ZV

Then, m XZ = m ZV

Twelve more than the product of a number and 5 is 52.Which equation models the sentence?

12−n⋅5=52

n÷5+12=52
12−n÷5=52
n⋅5+12=52

Answers

Final answer:

The equation 'n⋅5+12=52' correctly models the sentence 'Twelve more than the product of a number and 5 is 52'. This equation states that when a number is multiplied by 5 and 12 is added to the resulting product, the total is 52.

Explanation:

The question provides a phrase which can be expressed as an equation in mathematics. Given the phrase 'Twelve more than the product of a number and 5 is 52', we understand that 'product' refers to multiplication, 'number' is the unknown we are solving for, typically denoted by 'n', and 'twelve more than' means adding 12. Consequently, the mathematical equation that models the sentence is: n⋅5+12=52. This equation implies, the product of a number and 5, to which 12 is added, results in 52.