Mrs. Haley had 5/7 of a liter of salt water. She used 1/2 of a liter for an experiment. How much salt water does Mrs. Haley have left?

Mrs. Haley had
liters of salt water left.

Answer:

A sandwich is $3.50 and the price of a drink is $2.50

Step-by-step explanation:

Create a system of equations where s is the price of a sandwich and d is the price of a drink:

9s + 5d = 44

15s + 7d = 70

Solve by elimination by multiplying the top equation by 7 and the bottom equation by -5, then adding them together:

63s + 35d = 308

-75s - 35d = -350

Add them together:

-12s = -42

s = 3.5

Then, plug in 3.5 as s into one of the equations to solve for d:

9s + 5d = 44

9(3.5) + 5d = 44

31.5 + 5d = 44

5d = 12.5

d = 2.5

So, a sandwich is $3.50 and the price of a drink is $2.50

Answer:

A sandwich is $3.50 and the price of a drink is $2.50

Step-by-step explanation:

Plz mark as brainliest it would be helpful

Answer: 27 1/2 pages per hour

Step-by-step explanation:

if Carrie reads

12 min ........................5 1/2 pages

60 min........................5*(5 1/2) pages=27 1/2 pages

Answer:

D. Subtract 7

Step-by-step explanation:

[tex]\frac{x}{-4} + 7 = 1[/tex]

[tex]\frac{x}{-4} = 1 - 7[/tex]

[tex]\frac{x}{-4} = 6[/tex]

[tex]x = (-4) \cdot 6[/tex]

[tex]x = -24[/tex]

Answer:

$25.00

Step-by-step explanation:

200-100=100

100/4=25

Answer:

( 39.6 * 5 ) / 9

Step-by-step explanation:

( 39.6 * 5 ) /  9                Equation

( 198 ) /  9                        Done operation in brackets

22                                   Removed parenthesis

Answer:

(-4, 3)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Algebra I

Step-by-step explanation:

Step 1: Define Systems

-3x - 3y = 3

y = -5x - 17

Step 2: Solve for x

Substitution

Step 3: Solve for y

Answer:

μ = 0.4

Standard deviation σ = 0.0512 (Approx)

Step-by-step explanation:

Given:

Sample size n1 = 100

Sample size n2 = 200

Proportion p1 = 0.7

Proportion p2 = 0.3

Find:

Standard deviation σ

Computation:

μ = p2 - p1

μ = 0.7 - 0.3

μ = 0.4

Standard deviation σ = √p1(1-p1)/n1 + p2(1-p2)/n2

Standard deviation σ = √0.7(1-0.7)/100 + 0.3(1-0.3)/400

Standard deviation σ = √0.0021 + 0.000525

Standard deviation σ = √0.002625

Standard deviation σ = 0.0512 (Approx)

Answer:

Step-by-step explanation:

Lands on C on 8 out of 30 times = 4/15= .26666 times

we expected to land on C using theoretical probability 1/5 =.2 times

for 1,000 times it will be expect to land on C, 200 times because,

1*200 = 200 C  : 5*200 =1,000 spins

we do not expected to land on C exactly 200 times yet we expected  something close to that 200 number.

Answer:

C

Step-by-step explanation:

It rises and and runs (to the right) 3,

The full expression would be y = 8/3x +4

Hope that helps

We're given the following expression:

[tex]-4.9t^2+22t+1.8[/tex]

First, let's define the different types of terms in an expression.

Let's look at the given equation again:

[tex]-4.9t^2+22t+1.8[/tex]

Knowing what the different types of terms are, we can identify them in this expression:

Answer:

Y= 1/4x + 9

Step-by-step explanation:

Answer:

y = [tex]\frac{8}{3}[/tex] x + [tex]\frac{1}{3}[/tex]

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = [tex]\frac{8}{3}[/tex] x + 2 ← is in slope- intercept form

with slope m = [tex]\frac{8}{3}[/tex]

Parallel lines have equal slopes , thus

y = [tex]\frac{8}{3}[/tex] x + c ← is the partial equation

To find c substitute (- 2, - 5) into the partial equation

- 5 = - [tex]\frac{16}{3}[/tex] + c ⇒ c = - 5 + [tex]\frac{16}{3}[/tex] = [tex]\frac{1}{3}[/tex]

y = [tex]\frac{8}{3}[/tex] x + [tex]\frac{1}{3}[/tex] ← equation of parallel line

Answer:

72 dogs

Step-by-step explanation:

3 dogs/2 cats = x dogs/48 cats

Cross Multiply

3/2 x x/48

2x=144

x=72

Answer:

72 dogs

Step-by-step explanation:

First turn 3:2 into a fraction:

3/2

Then you can make the equation a proportion question, which is much eaiser to handle.

3/2=x/48  (I recommend writing this out so it will be easier to see)

Then you cross multiply, or multiply by the numerator of the first fraction by the denominator of the second, and the denominator of the first fraction by the numerator of the second.

Multiply 2 by x, which becomes 2x.

Multiply 3 by 48, which is 144

This becomes... 2x=144

You then solve with equation by dividing 144/2 and getting 72.

Meaning x=72 dogs

Answer:

yes

Step-by-step explanation:

substitute 4 for g. 4x5= 20 and 20 is definitely less than or equal to 25

Answer:

yes

Step-by-step explanation:

Given

5g ≤ 25

If g = 4 then

5g = 5 × 4 = 20 and

20 ≤ 25

Thus g = 4 is a solution of the inequality

Answer:

-3

Step-by-step explanation:

Answer:

200 oz

Step-by-step explanation:

Just use the equation

0.32x=200

The number of 32% which result in 60 oz would be 18.75

Suppose the value of which a thing is expressed in percentage is "a' the percent that considered thing is of "a" is b%. Then since percent shows per 100 (since cent means 100), thus we will first divide the whole part in 100 parts.

We need to find the number that is state 32% of number weight is 60 oz​

Let the unknown number is represneted by b.

It can be written by;

32% x b = 60

32/100 x b = 60

0.32 x b = 60

b = 60/0.32

b = 18.75

Therefore, the number would be 18.75

Learn more about percentage here:

brainly.com/question/11549320

#SPJ2

Answer:

x = - 7, x = 3

Step-by-step explanation:

To find the x- intercepts let f(x) = 0 , that is

x² + 4x - 21 = 0

Consider the factors of - 21 which sum to give the coefficient of the x- term (+ 4)

The factors are + 7 and - 3, since

7 × - 3 = - 21 and 7 - 3 = + 4, then

x² + 4x - 21 = 0

(x + 7)(x - 3) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 7 = 0 ⇒ x = - 7

x - 3 = 0 ⇒ x = 3

Answer: 1 13/24

Step-by-step explanation:

We need to convert 2/3 and 7/8 to have a common denominator. They both have a common denominator of 24 so...

We convert:

2/3 x 8/8=16/24

7/8 x 3/3 = 21/24

Then we add:

16/24 + 21/24 =37/21

Then we convert to a mixed number:

37/24= 1 13/24

Answer:

C, Or : This shows that it takes 2/3 of an hour to mow a lawn

Step-by-step explanation:

It simple. you just read the question. not that hard. .-.

Answer: 13

Step-by-step explanation:

Answer:

A + C

Step-by-step explanation:

Answer:

$104.51

Step-by-step explanation:

No.of people = 7

How much each person paid = $14.93

How much is the total bill = $14.93 x 7

                                          = $104.51

I was bored so I added the steps lol

Answer:

G(x) = 2x - 3 has a linear inverse which is a function.

k(x) = -9x2 has a square root inverse that is a function on only the interval x < 0.

Step-by-step explanation:

The inverse of a function is a reflection across the y=x line. This results in switching the values of the input and output or (x,y) points to become (y,x). This can be done algebraically in an equation as well. Begin by switching the x and y in the equation then solve for y.

x = 2y - 3 -------> y = x/2 + 3/2 is linear and a function.

-9y2 = x --------> y = √(-x/9)  is a square root that is a function on only the interval x < 0.

Absolute value does not have an inverse function.

x = -20 is a vertical line which is not a function.

Brainliest please?

Answer:

2

Step-by-step explanation:

Answer:

y=-3x-9

Step-by-step explanation:

Answer:

DE = 34

AC = 68

Step-by-step explanation:

since DE are midpoints, you can create this equation: 2(8x + 2) = 20x - 12

solve:

16x + 4 = 20x - 12

16x + 16 = 20x

16 = 4x

4 = x

plug this into both equations to find each side:

DE: 8(4) + 2 = 34

AC: 20(4) - 12 = 68

we know our answer is right because AC is twice as long as DE