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devlian [24]
3 years ago
6

Helppp please

Mathematics
1 answer:
amid [387]3 years ago
5 0

So 140 is the simple interest fee of 8% so 8% that her friend is charging her is only 140. So you can add that to the original price to know ALL of what she is gonna pay but that depends of you just want the fee or the whole total which is 1890

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Five packets of almonds cost 2m dollars. Mandy buys 3 packets of almonds. How much change does she receive if she paid with a $1
Vitek1552 [10]

Answer:

$4

Step-by-step explanation:

if its $2 per packet and he is buying 3 do 2x3 which is 6 then 10-6 which is $4

3 0
3 years ago
What is the answer to (-18) - 14 =
tester [92]

Answer:

-32

Step-by-step explanation:

Negative plus negative = Negative

Just add those 2 together,

(-)18 + (-) 14

Which is -32

(-) 32 = -32

4 0
3 years ago
A manufacturer of running shoes knows that the average lifetime for a particular model of shoes is 15 months. Someone in the res
Alexus [3.1K]

Answer:

Step-by-step explanation:

Hello!

So you have a new type of shoe that lasts presumably longer than the ones that are on the market. So your study variable is:

X: "Lifetime of one shoe pair of the new model"

Applying CLT:

X[bar]≈N(μ;σ²/n)

Known values:

n= 30 shoe pairs

x[bar]: 17 months

S= 5.5 months

Since you have to prove whether the new shoes last more or less than the old ones your statistical hypothesis are:

H₀:μ=15

H₁:μ≠15

The significance level for the test is given: α: 0.05

Your critical region will be two-tailed:

Z_{\alpha /2} = Z_{0.025}= -1.96

Z_{1-\alpha /2} = Z_{0.975}= 1.96

So you'll reject the null Hypothesis if your calculated value is ≤-1.96 or if it is ≥1.96

Now you calculate your observed Z-value

Z=<u>x[bar]-μ</u> ⇒ Z=<u>    17-15     </u> = 1.99

     σ/√n              5.5/√30

Since this value is greater than the right critical value, i.e. Zobs(1.99)>1.96 you reject the null Hypothesis. So the average durability of the new shoe model is different than 15 months.

I hope you have a SUPER day!

5 0
3 years ago
Simplify the following expression: 2x − 6y + 3x2 + 7y − 14x. 3x2 + 12x + y 3x2 − 12x − y 3x2 − 12x + y 3x2 − 12x − 13y
zheka24 [161]
-6x-13y 
2x+(3x2)-14x+(3x2)+12x+(3x2)-12x+(3x2)-12x+(3x2)-12x
2x+6x-14x+6x+12x+6x-12x+6x-12x+6x-12x=-6
-6y+7y+1y-1y+1y-13y=-13y
if a letter is by itself then there is automatically a one in front of it
8 0
3 years ago
Read 2 more answers
Write 12 1/3 as an improper fraction.
Julli [10]

Answer:

\frac{37}{3}

Step-by-step explanation:

12\frac{1}{3}

When converting mixed numbers (such as the one above), to improper fractions, we must first multiply the whole number by the denominator:

12*3=36

Then, add the numerator the the product:

36+1=37

Now, put the sum over the denominator to get your solution:

\frac{37}{3}

-

To check your work, you can convert the improper fraction to a mixed number to make sure you will end up with 12\frac{1}{3}.

Divide 37 into 3:

12 with a remainder of 1

Put the remainder over the denominator:

12\frac{1}{3}

Therefore, our solution is correct!

7 0
3 years ago
Read 2 more answers
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