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3 years ago

PLEASE HELP!! i’m not understanding!

Mathematics

2 answers:

Ad libitum [116K]3 years ago

7 0

Answer is:
b. 6 units

belka [17]3 years ago

5 0

Answer:

6 units

Step-by-step explanation:

count the boxes between Q and U

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Lizzie bought 0.8 kg of pears at €1.90 per kilogram and 1.4 kg of apples. The total cost €4.46. What was the price per kilogram

scoundrel [369]

Answer:

The the cost of 1 kg apples = € 2.1

Step-by-step explanation:

The amount of pears bought by Lizzie = 0.8 kg

The amount of apple bought by Lizzie = 1.4 kg

Total amount paid = €4.46

Now, the cost of 1 kg pears = €1.90 per kg

So, the cost of 0.8 kg pears = 0.8 x (1.90) = €1.52

Now, let the cost of 1 kg apples = € m

So, the cost of 1.4 kg apples = 1.4 x ( € m) = 1.4 m

So, the total amount = Cost of Apples + Cost of Pears

⇒ €4.46 = €1.52 + 1.4 m

or, 1.4 m = 4.46 - 1.52 = 2.94

⇒ m = 2.94/1.4 = 2.1

or, m = 2.1

Hence, the the cost of 1 kg apples = € 2.1

7 0

4 years ago

The average home price in Massachusetts is $410,000, with a standard deviation of $65,000. A city planner is studying the distri

77julia77 [94]

Answer:

$P(z$

And replacing the value obtained we got:

$z=-1.282$

And if we solve for a we got

$a=410000 -1.282*\frac{65000}{\sqrt{200}}=404107.68$

Step-by-step explanation:

Let X the random variable that represent the average home prices of a population, and for this case we know the distribution for X is given by:

Where $\mu=410000$ and $\sigma=65000$

For this part we want to find a value a, such that we satisfy this condition:

$P(X>a)=0.90$ (a)

$P(X$ (b)

We want to find a value who accumulate 0.10 of the area on the left and 0.90 of the area on the right of the normal standard distributon and for this case it's z=-1.282

And using the distribution for the sample mean we can do this:

$P(X$

$P(z$

And replacing the value obtained we got:

$z=-1.282$

And if we solve for a we got

$a=410000 -1.282*\frac{65000}{\sqrt{200}}=404107.68$

3 0

4 years ago

Consider the following statement. Fourteen more than 12 times the number equals 37 less than 11 times a number. a. Write an equa

Solnce55 [7]

12x + 14 = 11x - 37

12x - 11x = -37 - 14
x = -51

you put all the x's on one side and everything else on the other side, and then solve the equation by simplifying

7 0

3 years ago

How many distinct seven-digit phone numbers can you create from the numbers 4, 4, 5, 6, 7, 7, 7? (e.g. 445-6777 is one example)?

iris [78.8K]

You have 7 numbers, two numbers 4 , one 5, one 6 and three numbers 7.

From these 7 numbers you can create $7!=1\cdot2\cdot3\cdot4\cdot5\cdot6\cdot7=5040$ phone numbers, but they are not all different.

If you have two numbers 4, then you have to divide obtained number by 2! (the number of all possible permutations of two numbers 4) and since you have three numbers 7 you should divide the obtained number by 3! (the number of all possible permutations of three numbers 7). Then

 $\dfrac{5040}{2!\cdot 3!}= \dfrac{5040}{1\cdot2\cdot1\cdot2\cdot3}=420$ .

Answer: You can create 420 different phone numbers.

4 0

3 years ago

Answer plz...solve this sum n help me

tamaranim1 [39]

Answer:

28.57 m²

Step-by-step explanation:

Use rational terms.

$\frac{\frac{7}{9} }{200} =\frac{\frac{1}{9} }{x}$

Cross multiply:

7/9 · x = 1/9 · 200

7/9x = 200/9

x = 200/9 ÷ 7/9

x = 200/9 × 9/7

x = 200 · 9 / 9 · 7

x = 200 / 7

x = 28.57 m

3 0

4 years ago