Rueben has scores of 70, 75, 83, 80 on four Spanish quizzes. What score must he get? on the next quiz to achieve a quiz average of at least 80?

Answer:

89 - 28v10 = 0.456

Step-by-step explanation:

(7-2v10)² = 7² - 2*7*2v10 + (2v10)²

(7-2v10)² = 49 -28v10 + 40

(7-2v10)² = 89 - 28v10

Answer:

The birch tree needs 12 years

Step-by-step explanation:

Proportional Relationship

Two variables t and d are proportional if they have the relationship described by the equation:

d = kt

Where k is the constant of proportionality.

From the graph on the question, we recognize the proportionality of the age of a birch tree and its diameter because the line passes through the origin (0,0). To find the equation, we need to recognize a clear point on the graph. We select the point (2,7). Substituting in the equation:

7 = 2k

Thus:

[tex]k=\frac{7}{2}[/tex]

The equation is:

[tex]\displaystyle d=\frac{7}{2}t[/tex]

For the birch to have a diameter of d=42 inches, the time needed can be calculated by solving the equation:

[tex]\displaystyle 42=\frac{7}{2}t[/tex]

[tex]\displaystyle t=42*\frac{2}{7}[/tex]

t = 12 years

The birch tree needs 12 years

Answer:

Step-by-step explanation:

reflecitve property

both triangles are the same just on oppisites sides

Answer:

Step-by-step explanation:

No

Answer:

Step-by-step explanation:

If you circle has an r=17 cm,

A=r^2 x 3.14

A=289 x 3.14=907.46 cm^2

so choice A

Answer: 19 people per sqaure mile

Step-by-step explanation:

Given : Population in 2000 = 103,970,000

The population increased by 13.4% in 2010.

Population in 2010 = 103,970,000 + 13.4% of (103,970,000)

= 103,970,000+ (0.134)(103,970,000)

= 103,970,000(1+0.134)

=103,970,000(1.134)

=117,901,980

In 2000,

Population density= [tex]\dfrac{\text{Population}}{\text{Area}}[/tex]

[tex]=\dfrac{103970000}{761700}\approx 136\text{ people per square mile}[/tex]

In 2010

Population density = [tex]\dfrac{\text{Population}}{\text{Area}}[/tex]

[tex]=\dfrac{117901980}{761700}\approx155\text{ people per square mile}[/tex]

Difference = 155-136 = 19 people per sqaure mile

Hence, the increase in population density in 2010 = 19 people per sqaure mile

Answer:

$4.53

Step-by-step explanation:

Let us represent

The cost of a

Packet of tea = x

Packet of coffee = y

Five packets of tea and seven of coffee cost $39.40

5x + 7y = 39.40.....Equation 1

Three packets of tea and five of coffee cost $26.20.

3x + 5y = 26.20.......Equation 2

Combining both Equations

5x + 7y = 39.40.....Equation 1

3x + 5y = 26.20.......Equation 2

Multiply Equation 1 by 5 and Equation 2 by 7 to eliminate y

25x + 35y = 197.... Equation 3

21x + 35y = 183.4......Equation 4

Subtract Equation 4 from 3

3x = 13.6

x = 13.6/3

x = $4.53

Therefore, the cost of a packet of tea is $4.53

Answer:

2, 3, 5

Step-by-step explanation:

Please let me know if you want me to add an explanation as to why this is the answer. I can definitely do that, I just wouldn’t want to write it if you don’t want me to :)

Answer:

[tex]5 - m = 1.36 \\ \: \: \: \: \: \: \: \: \: m = 5 - 1.36 \\ m = 3.64[/tex]

Answer:

yes i think this so sad that theres no science

Step-by-step explanation:

Answer:

Segments MN and OP are parallel sides

Answer:

Sides MN and OP are parallel sides

Answer:

hi

Step-by-step explanation:

hi

Answer: x= 3.5

Step-by-step explanation: 4(3x) = 12x

4(-8)= -32

12x - 32 = 10

+32 = +32

12x = 42

x = 3.5

Answer:

x=3.5

Step-by-step explanation:

Start off by using distributive property ---> 12x-32=10, then add 32 on both sides---> 12x=42, then divide 12 on both sides--->x=3.5 and that is the final answer!

I hope this helps, and have a great day!

Answer:

Let 's' be the length of a side of the polygon.

Then,

perimeter = 15s

or, 120 = 15s

or, s = 8ft.

The area of regular polygon having 'n' number of sides with each of length 's' is given by:

A = [tex][{\frac{s}{2tan(\frac{180}{n}) }} (n)(s)]^{2}[/tex]

According to question,

s=8ft, n = 15

Therefore, Area = [tex][\frac{8}{2tan(\frac{180}{15}) }(15)(8)] = [\frac{480}{2tan(12)}] = (240cot12)[/tex] ≈1129.11sq. ft

Answer:

1) it looks like it'll be (1,5)

2) it looks like it'll be (-1,-1)

hope it's right

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

I'm big brain. hbvuivyvjbbu

Answer:

b

Step-by-step explanation:

Answer:

..........the answer is B

Answer:

around like 51.2 miles driven

Answer:

£23650

Step-by-step explanation:

FV (or AV) = PV(1+it)

22000(1+.025*3)

22000(1.075)

23650

Answer:

1.c^(5+1)=c^6

2.2×5y^(4+3)=10y^7

3.3×4g^(1+3)h^(2+3)=12g^4h^5

Answer:

D is your answer

Step-by-step explanation:

(2y-7) (y+6) that is my answer and it matches with D promise 100%

The possible dimensions of the pool are the factors of the trinomial, which are:

2y - 7 and y + 6

The correct answer is (D).

An expression contains one or more terms with addition, subtraction, multiplication, and division.

We always combine the like terms in an expression when we simplify.

We also keep all the like terms on one side of the expression if we are dealing with two sides of an expression.

Example:

1 + 3x + 4y = 7 is an expression.

3 + 4 is an expression.

2 x 4 + 6 x 7 – 9 is an expression.

33 + 77 – 88 is an expression.

We have,

To find the possible dimensions of the pool, we need to factor the trinomial 2y² + 5y - 42.

We can start by looking for two numbers that multiply to -84 (the product of the first and last coefficients of the trinomial) and add up to 5 (the middle coefficient of the trinomial).

Those numbers are 12 and -7, because 12 x -7 = -84 and 12 + (-7) = 5.

Using these numbers, we can rewrite the trinomial as:

2y² + 12y - 7y - 42

Now we can factor by grouping:

(2y² + 12y) - (7y + 42)

2y(y + 6) - 7(y + 6)

(2y - 7)(y + 6)

So the possible dimensions of the pool are the factors of the trinomial, which are:

2y - 7 and y + 6

Therefore,

The possible dimensions of the pool are the factors of the trinomial, which are:

2y - 7 and y + 6

The correct answer is (D) 2y - 7 and y + 6.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ2

Answer:

If it is Area, the answer is:

A=6 (2x+1)

If it is Perimeter it is:

P= 3x+ 13

Answer:

b.) 5t+1-4t^2/t^2(t+1)

Step-by-step explanation:

Answer:

(5x−1)(5x−1)

Step-by-step explanation:

25x2−10x+1

=(5x−1)(5x−1)

Answer:

none of these, it should be 25%

Step-by-step explanation:

Answer:

y/x

Step-by-step explanation:

Answer:

Hey

Step-by-step explanation:

Im not totally sure but I think it is 1 hour because if you double the people, the time should be split in half. I may not be correct. I hope this helped