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Svetradugi [14.3K]
3 years ago
14

Subtract -7a^2+3a-9−7a

Mathematics
1 answer:
White raven [17]3 years ago
6 0
You will subtract these top 2
- 7 {a}^{2}  + 3a - 9 - 7 {a}^{2}  + 3a - 9

5 {a}^{2}  - 6a - 45 {a}^{2}  - 6a - 4
and this bottom one is your ANSWER

- 12 {a}^{2}  - 110a - 22
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An 80% confidence interval is (150, 170). What is the margin of error?
Viefleur [7K]

Answer:

10

Step-by-step explanation:

it is what it is

5 0
3 years ago
The average turkey sold in the US in 2005 played about 28 pounds with standard deviation of three times the average in 1965 was
Viktor [21]
In 2005, 23 is in the second deviation
19 22 25 28 31 33 35
In 1965, 23 is in the third deviation.
12 14 16 18 20 22 24
<span>By the way, 13.5% range from 22 to 25 in 2005, while 2.1% range from 22 to 24 in 1965</span>
4 0
3 years ago
Alice placed $1,900 in a savings account which earns 2.2% interest, compounded every year. How much will she have in the account
ella [17]

She will have $2118 in her account after five years

<h3>How to determine the amount in five years?</h3>

The given parameters about the compound interest are

Principal Amount, P = $1,900

Interest Rate, R = 2.2%

Time, t = 5

Compound interests are different from simple interest, and they are calculated using the following compound interest formula

CI = P(1 + R)^t - P

To calculate the amount, we have:

A = P + CI

So, the equation becomes

A = P + P(1 + R)^t - P

Evaluate the like terms

A = P(1 + R)^t

Substitute the known values in the above equation

A = 1900 * (1 + 2.2%)^5

Express 2.2% as decimal

A = 1900 * (1 + 0.022)^5

Evaluate the sum

A = 1900 * (1.022)^5

Evaluate the exponent

A = 1900 * 1.11495

Evaluate the product

A = 2118

Hence, she will have $2118 in her account after five years

Read more about compound interest at:

brainly.com/question/24924853

#SPJ1

6 0
1 year ago
Upperloaf Bakery is baking loaves of cornbread and poppy-seed blueberry cake. The recipe for one loaf of corn bread calls for 2
swat32

Answer:

2.25c + 1.75p ≤ 28

1.25c + 2.125p ≤ 30

Step-by-step explanation:

Write a system of two inequalities to model loaves of bread and

cake that can be baked.

let

number of cornbread loaves = c

number of poppy-seed blueberry Cake loaves = p

corn bread

cups of flour = 2 1/4 = 2.25

teaspoon of baking soda = 1 1/4 = 1.25

One loaf of poppy-seed blueberry cake

cups of flour = 1 3/4 = 1.75

teaspoons of baking soda = 2 1/8 = 2.125

The bakery has 28 cups of flour and 30 teaspoons of baking soda in stock.

Quantity of flour to use

c(2.25) + p(1.75)

Quantity of baking soda to use

c(1.25) + p(2.125)

The inequality is

c(2.25) + p(1.75) ≤ 28

c(1.25) + p(2.125) ≤ 30

Alternatively,

2.25c + 1.75p ≤ 28

1.25c + 2.125p ≤ 30

4 0
3 years ago
The ratio of red tulips to all tulips in Briana's garden is 1 to 3. Is it reasonable to think that the total number of tulips in
Anestetic [448]
1x-\ amount\ of\ red\ tulips\\&#10;3x-\ amount\ of\ all\ tulips\\\\&#10;Total\ number\ of\ tulips\ is\ equal\ to\ 30\ not \ 40.
8 0
3 years ago
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