A submarine descends from sea level to the entrance of an underwater cave. The elevation of the entrance is -120 feet. The rate of change in the submarine’s elevation is less than -12 feet per second. Can the submarine reach the entrance to the cave in less than 10 seconds? Explain.

Answer:

5x+2y=36-------(1)

2x+3y=43-------(2)

Now ,

from(1)

5x+2y=36

or, X=(36-2y)/5-------------------(3)

now putting the value of x in eqn ----(2)

72-4y+3y=43

or, 72-43=y

:- Y=29✔️✔️

Again .putting the value of Y in eqn-----(3) we get,

;- X=(36-2×29)/5

or, X=(36-58)/5

or, X=. (-22)/5

X= (-22)/5 or 4.4✔️✔️

Answer:

c. the number's distance from zero on the number line

Step-by-step explanation:

absolute values definition

Explanation:

The order of ABC and RPQ is important so we can match up the angles like so

Meaning that angle Q = 75 since angle C is this measure.

Answer:

∠ Q = 75

Step-by-step explanation:

The reason,

As we can see that Triangle ABC is congruent to Triangle RPQ, so that means, ∠A =∠R , ∠B = ∠P , ∠C = ∠Q

And ∠C = 75° which means, ∠Q = 75°

If my answer helped, please mark me as the brainliest!!

Thank You!

Answer:

x = 4

Step-by-step explanation:

y=-2 is a horizontal line so x must be a vertical line through (4,-2)

Answer:

31.5 units^2

Step-by-step explanation:

Rectangle area (RA) = l × w

Triangle area (TA) = (bh)/2

RA = 3 × 7

RA = 21

TA = (7 × 3)/2

TA = 21/2

TA = 10.5

(Triangles are congruent as shown by the lines on each side of the triangle so I can calculate area of both of them together as I just did)

Add areas together

21 + 10.5 = 31.5

Answer:

-x + 13

Step-by-step explanation:

x - 2x + 13 =

Combine like terms, x and -2x.

= -x + 13

Answer:

13-x

Step-by-step explanation:

x-2x can alsso mean x(1-2). (1-2)=(-1). So x(-1)=-x.

So now you have -x+13, or to make it shorter, 13-x.

Answer:

a=37

Step-by-step explanation:

22+15=37

Answer:   The solution is: " a = 37 " .

____________________________

Step-by-step explanation:

____________________________

Given the equation:

 a − 15 = 22  ;  Solve for "a" .

Add "15" to each side of the equation;

to isolate "a" on one side of the equation;  

  and to solve for "a" :

a − 15 + 15 = 22 + 15 ;

  to get:

____________________________  

          →   a = 37 .

____________________________

Hope this answer—and explanation—is helpful!

 Wishing you the best!

____________________________

Answer:

P = 12m

A = 6m^2

Step-by-step explanation:

Perimeter is the sum of all the lengths of a shape. The lengths of the triangle are given as 3m, 4m, and 5m, so to find the perimeter we just need to add them all together. 3+4+5=12, so the perimeter of the triangle is 12m.

The area of a triangle is found by multiplying its height by its base and then dividing the result by 2. The height of the triangle is not given, but the side lengths (3,4 and 5) indicate that the triangle is a right triangle. This means we can use the middle length as the height and the shortest length as the base.

So, the height of the triangle is 4m, and the base is 3m, so to calculate the area:

(3x4)/2=12/2=6m^2.

The area of the triangle is 6m^2.

Hope this helped!

Assuming you know the mean (mu) and the standard deviation (sigma), you would use the raw score (x) to get the z score through this formula

z = (x-mu)/sigma

If you get a positive z value, then the raw score is above the mean. If z is negative, then the raw score is below the mean.

The absolute value of z tells us how far away from the mean we are in terms of standard deviation.

Eg: z = -3 leads to |z| = |-3| = 3, so we're 3 standard deviations below the mean.

Answer:

-4<=x<infinity

Step-by-step explanation:

I believe I am right.

Answer:

A, C, and D

Step-by-step explanation:

Answer:  

90 + 7 + .6

Step-by-step explanation:

The expanded form is:

90 + 7 + .6

Hopefully this helps you

pls mark brainlest

F(x) = {x < 4 : -(2x - 8) , x ≥ 4 : 2x - 8}

I agree with the other persons answer.

Answer:

4A=5.1 per million 4B=3.8 years

Step-by-step explanation:

4A. A=0.2^2+.01t+5.1 the current level would be 5.1

4B. 8=.2t^2+.01+5.1 minus 8  .2t^2+.01-2.9

t=(-1.0+squ.0001-41-.58)/.4

t=(-.01+squ2.3201)/.4

t=3.78  t+3.78=0 =-3.78

t=-3.83 t-3.83=0 =3.83

Answer 3.83 years

Answer:

instructions within hardware.

Step-by-step explanation:

I think it work

Answer:

answer is c

just took the quiz

Step-by-step explanation:

3 ice cream machines will make a total of 480 gallons for the same length of time

4 ice cream machines will make a total of 640 gallons for the same length of time

From the question,

We are to determine the number of gallons of ice cream that could be made.

From the given information,

2 ice cream machines make a total of 320 gallons in a certain amount of time.

If 2 ice cream machines can make a total of 320 gallons

Then,

3 ice cream machines will make a total of x gallons in the same amount of time

x = [tex]\frac{320 \times 3}{2}[/tex]

x = 480 gallons

Hence, 3 ice cream machines will make a total of 480 gallons.

If 2 ice cream machines can make a total of 320 gallons

Then,

4 ice cream machines will make a total of y gallons in the same amount of time

y = [tex]\frac{320 \times 4}{2}[/tex]

y = 640 gallons

Hence, 4 ice cream machines will make a total of 640 gallons.

Learn more on quantity here: https://brainly.com/question/181426

Answer:

12) 45°

13) 125°?

14) SQR, RQS, and QSR

I am not sure about my answers, but I hope that you will finish your homework!

Answer:

196, 245, 294

Step-by-step explanation:

sum the parts of the ratio, 4 + 6 + 6 = 15 parts

Divide the total by 15 to find the value of one part of the ratio

735 ÷ 15 = 49 ← value of 1 part of the ratio, thus

4 parts = 4 × 49 = 196

5 parts = 5 × 49 = 245

6 parts = 6 × 49 = 294

Answer:

     a2+8a+2

-----------------------

a3+11a2+32a+28

(all of that is a fraction)

Answer: 8 = |-8| = True   |5| = 5  = True  -3 = |3|  =  False     -|18| = -18   =  False   2 = |2|    = True     |-1.5| = -1.5   = False

Step-by-step explanation: The bars mean that the number is always positive

Answer:

Step-by-step explanation:

Alberto uses the steps below to solve the equation One-half x minus 3 equals 7. Step 1: One-half x minus 3 plus 3 equals 7 plus 3 Step 2: One-half x plus 0 equals 10 Step 3: One-half x equals 0 Step 4: 2 (one-half) x equals 2 (10) Step 5: 1 x equals 20 Step 6: x equals 20.

Which justifies Step 6 of his work? the addition property of equality the identity property of addition the multiplication property of equality the identity property of multiplication.

1/2x - 3 = 7

One-half x minus 3 equals 7.

Step 1: add 3 to both sides

1/2x - 3 + 3 = 7 + 3

One-half x minus 3 plus 3 equals 7 plus 3

Step 2:

1/2x + 0 = 10

One-half x plus 0 equals 10

Step 3: One-half x equals 10

1/2x = 10

Step 4: Multiply both sides by 2

1/2x * 2 = 10 * 2

2 (one-half) x equals 2 (10)

Step 5:

1x = 20

1 x equals 20

Step 6:

x = 20

x equals 20.

identity property of multiplication states that when 1 is multiplied to an equation, the result remains the same.

identity property of multiplication justifies Step 6 of his work

Answer:

-51

Step-by-step explanation:

4xy + 2y^2-z

4(5)(-4) +2(-4)^2 -3

(20)(-4) + 2(-4)^2 -3

-80 +(2)(16) - 3

-80 + 32 - 3

-48-3

-51

Answer: D

Step-by-step explanation:

To find the perimeter of the square, you want to first find the length of each side. Since the figure is a square, we know that each side is equal to each other. We can set the expressions equal to each other to find x.

[tex]\frac{3}{4}x-1=\frac{1}{2}x+7[/tex]           [subtract both sides by 1/2x]

[tex]\frac{1}{4}x-1=7[/tex]                    [add both sides by 1]

[tex]\frac{1}{4}x=8[/tex]                           [multiply both sides by 4]

[tex]x=32[/tex]

Now that we know x, we can plug it into each expression to find teh length of each side.

[tex]\frac{3}{4}(32)-1[/tex]                       [multiply]

[tex]24-1[/tex]                           [subtract]

[tex]23[/tex]

Now that we know each side is equal to 23, we can add all the sides together to find the perimeter.

23+23+23+23=92        or          23×4=92

Since we know that the perimeter is 92 units, the answer is D.

Answer:

Dude easy it is d

Step-by-step explanation:

If you want to learn perimeter all over again listen to the perimeter song you count up all the sides that are the same.

Answer:

Expression will be 10(x - 6).

Step-by-step explanation:

Let the given number is x.

Difference of this number and 6 will be represented by

(x - 6)

Then ten times the difference of this number and 6 will be represented by

10(x - 6)

Therefore, the statement " ten times the difference of a number and six " will be represented  by the expression 10(x - 6)

Answer:

(5, 4)

Step-by-step explanation:

[tex]\boxed{midpoint = ( \frac{x1 + x2}{2} , \frac{y1 + y2}{2}) }[/tex]

(X₁, Y₁) is the coordinates of the 1st point and (X₂, Y₂) is the coordinates of the 2nd point.

Using the formula above,

[tex]midpoint \: of \: segment \\ = ( \frac{9 + 1}{2} , \frac{9 - 1}{2} ) \\ = ( \frac{10}{2} , \frac{8}{2} ) \\ = (5,4)[/tex]

Answer:

If two points are in a plane, then the line that contains the points is in that plane. Theorem 1: If two lines intersect, then they intersect in exactly one point. ... Two points both lie in each of two lines.

Step-by-step explanation:

Answer:

What does this even mean????

Step-by-step explanation:

this is just a bunch of random letters.

Answer:

30600 seconds

Step-by-step explanation:

We know that,

1 hour = 3600 seconds,

to find for 8.5 hours, we simply just multiply it by 8.5,

3600 * 8.5 = 30600 (After you do the calculations)

If I am wrong please tell me,

If my answer helped you, please mark me as the brainliest!!

Thank You !

Answer:

1331

Step-by-step explanation:

Since 121 is a perfect square you can take the square root of it to figure out what x equals then just take what x equals and cube it.