Problem 1: Your grades on your first three math tests were 81, 76, and 78. You have one
more test to take. What grade do you need on that last test in order to get an 80
average?
Problem 2: You have $65 in your saving account, and your brother has $140 in his savings
account. You are depositing $15 per week to your account, and your brother is depositing
$10 per week to his account. In how many weeks will you and your brother have the same
amount of money?

Answer:

-15

Step-by-step explanation:

() means to multiply

So, -3(5) = -3 x 5 = -15

Answer: -15

The question asks you to find the "product," which means the result of multiplying. Both the word "product" and the parentheses indicate that you have to multiply.

Since it's a negative (-) multiplied by a positive (+), your product will be negative (-).

So, -3(5) = -15.

no because two of the pairs have the same input values

Answer:

40 7th Graders

Step-by-step explanation:

First you add all of the students to get 25. Then you divide 100 by 25 to get 4 (this is gonna be your multiplier) now multiply each part of the ration by 4, and you get 60 6th graders and 40 7th graders :D.

Answer:

d:)

Step-by-step explanation:

Answer:

Step-by-step explanation:

Given that :

Mean (μ) = 2500

Standard deviation (σ) = 400

P = 97.5% = 0.975

Zscore corresponding to p(z > x) = 0.975

Z = - 1.96 ( Z probability calculator)

Using the relation :

Zscore = (score (x) - μ) / σ

-1.96 = (x - 2500) / 400

x - 2500 = 400 * - 1.96

x - 2500 = - 784

x = - 784 + 2500

x = 1716

Hence, number of flying hours required is 1716

Answer:

$86.70

Step-by-step explanation:

Answer:  $86.7

Step-by-step explanation: because you have to multiply them

Answer:

C4H10O + O2 = CO2 + H2O - Chemical Equation Balancer.

Step-by-step explanation:

Answer:

70%

Step-by-step explanation:

Answer:

7/10 or 7 over 10

Step-by-step explanation:

Answer:

see below

Step-by-step explanation:

y = 5x - 31

y = mx + b

where m = slope

slope of a parallel line = 5

slope of a perpendicular line = - 1/5

Answer:

$7.25

Step-by-step explanation:

4.95 x 5 = 24.75

32-24.75 = 7.25

Answer:

A) Dimensions;

Length = 20 m and width = 10 m

B) A_max = 200 m²

Step-by-step explanation:

Let x and y represent width and length respectively.

He has 40 metres to use and he wants to enclose 3 sides.

Thus;

2x + y = 40 - - - - (eq 1)

Area of a rectangle = length x width

Thus;

A = xy - - - (eq 2)

From equation 1;

Y = 40 - 2x

Plugging this for y in eq 2;

A = x(40 - 2x)

A = 40x - 2x²

The parabola opens downwards and so the x-value of the maximum point is;

x = -b/2a

Thus;

x = -40/2(-2)

x = 10 m

Put 10 for x in eq 1 to get;

2(10) + y = 40

20 + y = 40

y = 40 - 20

y = 20m

Thus, maximum area is;

A_max = 10 × 20

A_max = 200 m²

The area of the pen is the product of its dimensions

The largest area the farmer can enclose is 200 square meters

The perimeter of the pen is given as:

[tex]\mathbf{P = 40}[/tex]

Because one side of the fence is covered by a river, the perimeter would be:

[tex]\mathbf{2x + y = 40}[/tex]

Make y the subject

[tex]\mathbf{y = 40 - 2x}[/tex]

The area of the pen is:

[tex]\mathbf{A = xy}[/tex]

Substitute [tex]\mathbf{y = 40 - 2x}[/tex]

[tex]\mathbf{A = x(40 - 2x)}[/tex]

Expand

[tex]\mathbf{A = 40x - 2x^2}[/tex]

Differentiate

[tex]\mathbf{A' = 40 - 4x}[/tex]

Set to 0

[tex]\mathbf{ 40 - 4x = 0}[/tex]

Rewrite as:

[tex]\mathbf{ 4x = 40}[/tex]

Divide through by 4

[tex]\mathbf{x = 10}[/tex]

Substitute 10 for x in [tex]\mathbf{A = x(40 - 2x)}[/tex]

[tex]\mathbf{A = 10 \times (40 - 2(10))}[/tex]

[tex]\mathbf{A = 200}[/tex]

Hence, the largest area the farmer can enclose is 200 square meters

Read more about maximum areas at:

https://brainly.com/question/11906003

Answer:

1,520

Step-by-step explanation:

Answer:

1.4 U.S. Dollar

Step-by-step explanation:

Answer:

Take the square root of 3 then raise it to the 15 th power, i.e. (√3)15. Raise 3 to the 15 th power then take the square root, i.e. √315.

Answer:

D

Step-by-step explanation:

3^7 square root of 3

Answer:

1 question : 0.89 I think.

Answer:

2. 0.51

3. 1.5

4. 0.99

5. 0.66

6. 0.79

7. 5.2

8. 4.86

9. 4.3

10. 1.5

11. 5.84

Answer:

6 2/1 i think

Answer:

just figue out 2x2 then the answer subtract 12x then subtrct 191

Step-by-step explanation:

Answer:

wednesday i think idk (sorry if wrong)

Step-by-step explanation:

Answer:

24

Step-by-step explanation:

Let’s write them as numbers

6/1/4

Dividing by 4 means multiplying by its reciprocal.

Reciprocal of a number: Can be found when you switch the positions of the denominator and numerator

So reciprocal of 1/4=4/1=4

Next, we multiply by its reciprocal

6*4=24

Therefore, 6 divided by one fourth is 24.

Answer:

Product = [tex]\dfrac{64}{135}[/tex]

Step-by-step explanation:

The expression is as follows :

[tex]\dfrac{4}{7}\times \dfrac{8}{9}\times \dfrac{14}{15}[/tex]

We need to find the product of the above expression

As 7 × 2 = 14

So, it will become :

[tex]4\times \dfrac{8}{9}\times \dfrac{2}{15}\\\\=\dfrac{4\times 8\times 2}{9\times 15}\\\\=\dfrac{64}{135}[/tex]

So, the product of the given fractions is [tex]\dfrac{64}{135}[/tex].

Answer:

64/135

Step-by-step explanation:

Answer:

30 toys

Step-by-step explanation:

PLEASE MARK BRAINLIEST

Answer:

A

Step-by-step explanation:

Id say A Im sorry If im wrong though, this is what I would put

Answer:

where is the problem???

Step-by-step explanation:

Answer:

25 remainder of 4

Step-by-step explanation:

Answer:

here hope this will be you ^^"

▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃

Answer:

22

Step-by-step explanation:

Answer:

22.916666666 The six is repeated

Step-by-step explanation:

10/12=8.3333333 and 8.3333333*27.5=22.916666666 repeated

Answer:

About 23

Step-by-step explanation:

Weight x 0.83333 = medication

so, 27.5 x 0.83333 = 22.825 (rounded to 23)

Answer:

8:4

Step-by-step explanation: