what is the value of 7 -(-4)

The expression is simplified to s = -5/ 4

Algebraic expressions are expressions composed of terms, variables, constants, factors and coefficients.

They are also made up of mathematical operations such as addition, subtraction, multiplication, division, etc

Given the expression;

42 = 14{ 4 + 4/ 5s}

Divide both sides by 14

42/14  = 14{ 4 + 4/ 5s}/14

3 = 4 + 4/ 5s

3 =   20 + 4s/5

cross multply

15 = 20 + 4s

collect like terms

15 - 20 = 4s

-5 = 4s

Make 's' the subject

s = -5/ 4

Thus, the expression is simplified to s = -5/ 4

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Answer:

Yes, that means the whole fraction is negative.

Also for future note, if the negative is on the top or bottom, the fraction will still be negative. Unless it says to simplify.

Hope this helps!

The correct answer is A. 13.

We have been given equation. Now, to find the value of x, we will take square root. So, solving the mathematical expression now -

x = √169

Taking square root to find the value of x

x = 13

Since the number is positive. the square root of the number will also be positive.

Hence, the solution to equation is A. 13.

Further to cross check, we can also square the resultant number.

On squaring the number 13 for validation of our result, we get 169. It is the same number as in mathematical expression provided to us. Thus, our resultant solution to equation is correct.   

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The complete question is -

What are the solutions to the equation x² = 169? Choose all answers that are correct. A. 13 B. –13 C. 84.5 D. –84.5

The coordinates of the centroid of Δ ABC is y = -1/3x + 2.

The slope of the line is the rise-to-run ratio or the rise divided by the run. It expresses the slope of a line in the coordinate plane. Finding the slope of a line is similar to determining the slope between two points.

The midpoint D of AC is (-3+4/2, 3-3/2) or (1/2, 0).

Note that DB is a line that connects the vertex B and D, the midpoint of AC.

The slope of the line DB is ((5-0)/(2-1/2)) or 10/3.

The equation of DB is

y - 5 = 10/3 (x - 2)

simplifying the above equation, we get

y - 5 = 10x/3 - 20/3

y - 5 + 5 = 10x/3 - 20/3 + 5

y = 10x/3 - 5/3

Use the same method to find the equation of the line between point A and the midpoint of BC.

Therefore, the coordinates of the centroid of Δ ABC is y = -1/3x + 2.

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The knowledge of  how many more minutes m you can use during the rest of the month is given by the linear inequality 648 + m ≤700, where 'm' is the minutes on the cell phone or simply m ≤ 52

It is given that the  monthly minutes on your cell phone can add up to no more than 700 minutes so the highest limit is 700

And You have already used 648 minutes so this is our base for the formation of linear inequality

We are provided to use 'm' for rest of  the minutes on the cell phone

Hence, we can form a linear inequality using the three points as the sum of already used minutes and the maximum minutes that can be used in this month is at most  700 minutes is given by 648 + m ≤700

This can also be simplified as

m ≤ 700 - 648

m≤52

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Answer:

base : 7 units

height : 4 units

The value of A in the 4-digit number is 5.

Given the information provided in the question, the 4-digit number is a multiple of 15. A multiple of a number is the product of an integer and that number.

The multiple of a number is divisible by that number. For example, a multiple of 2 is 20. This is because 2 multiplied by 10 is equal to 20 and 20 is divisible by 2 to yield a value of 10.

The multiplies of 15 either have a unit value of 5 or 0.

If A is 5, the number becomes 3555.

3555 / 15 = 237

If A is 0, the number becomes 3050

3050 / 15 = 203.333

Thus, the value of A is 5 because 3555 is divisible by 15.

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The product of the smallest and largest integer is 672

Represent the smallest even integer with x.

So, the other even integers are x + 2 and x + 4

The sum is represented as

x + x + 2 + x + 4 = 18 + 5/2x

Evaluate the like terms

3x + 6 = 18 + 5/2x

Evaluate the like terms

1/2x = 12

Multiply by 2

x = 24

The largest integer is x + 4

So, we have

x + 4 = 24 + 4

x + 4 = 28

The product of the smallest and largest integer is

Product = 24 * 28

Evaluate

Product = 672

Hence, the product of the smallest and largest integer is 672

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The ball hits the surface at 43.5° and bounces back at 43.5°.

A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.

Given that When a ball is bounced on a smooth surface, the angles formed by the path of the ball are congruent.

If the path of a ball forms a 53 angle with the floor, find  the angle with the floor, x

Let the angle with the floor, x

Using, to find x, setup the equation:

x+ 53 +x=180

2x+ 53 =180

2x = 127

x= 43.5°

Therefore, the ball hits the surface at 43.5° and bounces back at 43.5°.

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The approximate circumference of the path Round to the nearest hundredth is 93.12 feet.

A circle's outside boundary is called the circumference and can be measured, or calculated, by using

Circumference = 2πr

where r is the radius of circle.

Now it is given that,

circumference of pond = 68 feet

⇒ 2πr = 68

⇒ r = 34/π

⇒ r = 10.82 feet

Now it is also given that, The outer edge of the path is going to be 4 feet from the pond all the way around

⇒ Radius of path, R = r + 4

⇒ Radius of path, R = 10.82 + 4  

⇒ R = 14.828

So,circumference of the path = 2πR

⇒ circumference of the path = 2π*14.828 = 93.119 feet

⇒ circumference of the path Round to the nearest hundredth = 93.12 feet

Thus, the approximate circumference of the path Round to the nearest hundredth is 93.12 feet.

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The area of the figure is 289 square unit

The area of a rectangle can be calculated by multiplying the length and the width of the shape.

Given that

But the length and the width have two equal opposite sides. The shape is a square

20 - x = 3x + 8

20 - 8 = 3x + x

12 = 4x

x = 12/4

x = 3

L = 20 - 3 = 17

B = 3(3) + 8

B = 9 + 8

B = 17

A = 17 x 17

A = 289 square unit

Therefore, the area of the figure is 289 square unit

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Answer:

well done .....I hope it's helpful

Answer:

I'm pretty sure the answer is E

If a student has some 1 bills and 5 bills in his wallet and he has a total of 15 bills that are worth 47, then the number of 1 bills he has is equal to 7 and the number of 5 bills he has is equal to 8.

The number of bills of each type can be calculated by forming a system of equations.

Consider x to be the number of 1 bills and y to be the number of 5 bills.

The first equation can be given as,

x + y = 15

The second equation can be given as,

x + 5y = 47

The two equations can be solved by using the substitution method:

By rearranging the first equation the value of x can be calculated to be,

x + y = 15

x = 15 - y

Putting this value of x in the second equation,

x + 5y = 47

15 - y + 5y = 47

4y = 47 - 15

4y = 32

y = 32 ÷ 4

y = 8

The value of x can be determined by putting y = 8 in the first equation,

x + y = 15

x + 8 = 15

x = 15 - 8

x = 7

Hence, the number of 1 bills and 5 bills are equal to 7 and 8 respectively.

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He estimates that he will stand 6 feet 9 inches tall when he is 20 years old. His prediction is correct.

Given: Growth per year = 3 inches

Height at 15 yrs of age = 5'6''

Height at 20 yrs of age = 6'9''(predicted)

We know that Jesse grows 3 inches every year.

In 5 years(15yrs - 20yrs) his growth = 5 × 3 = 15 inches.

At 15 years(present) height = 5'6''

At 20 years (future) height = 5'6'' + 15'' = 6'9'' (since, 1ft = 12 inches)

Thus, Jesse's prediction is correct

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The fabric that she cannot use is the softballs.

A proper fraction is a non-integer that is made up of a numerator that is smaller in value than the denominator. A mixed fraction is a fraction that is made up of an integer and a proper fraction. An example of a mixed fraction is 1 7/8.

The first step is to determine the total amount of fabric needed for the 4 friends : 1 7/8 x 4

15/8 x 4 = 60 /8 = 7 1/2 yards

The second step is to convert the mixed fractions to decimals, by dividing the numerator by the denominator and adding the integer.

7 1/2 = 7.5

73/5 = 7.6

The fabric that cannot be used as the fabrics that are less than 7.5 yards.

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You can add the distance she travelled upwards to her new distance to get her old distance.

Essentially, 21.6 + 61.9 = 83.5.

This means she was 83.5 feet below sea level, before ascending 61.9 feet to 21.6 feet below sea level.

Answer: she was 83.5 feet below sea level, before ascending 61.9 feet to 21.6 feet below sea level.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

x | y

-2. -2

-1. 2

0. 6

1. 10

2. 14

how many numbers do we have between each number on Y? 4

Step 1

this you have to use this data to make your function

f(x)=4X

Always you have to use the spaces times X

Step 2

We have to calculate what do we need to satisfy the function, in this case we have to add 6

f(x)=4x+6

Answer:

70 miles per hour

Step-by-step explanation:

take 875mi and divide by how long it took: 12.5 hours

Answer:

7

Step-by-step explanation:

5x + 3 = 38

5x + 3 - 3 = 38 - 3

5x = 35

5x ÷ 5 = 35 ÷ 5

x = 7

Answer:

Step-by-step explanation:

990 x 70% = 693 people

Answer:

[tex]1 - 5q + 5q + 16 \\ = 17[/tex]

The equation of the line in point-slope form, which passes through the pair of points located at (-4 , 10) and (-6 , 15), is y - 10 = -5/2(x + 4).

The equation of a line can be expressed in three different forms: standard form, slope-intercept form, and point-slope form.

The standard form of an equation of a line is expressed as ax + by = c, where a and b, if all possible must be integers, are the coefficients of variable x and y, respectively, and c is a constant. Meanwhile, slope-intercept form is given by the formula y = mx + b, where m is the slope of the line and b is the y- intercept. On the other hand, given the slope m and a point on the line (x , y), we can express the equation in point-slope form, (y - y1) = m(x - x1).

Getting the slope of the two points: (-4 , 10) and (-6 , 15).

m = (y2 - y1)/(x2 - x1)

m = (15 - 10)/(-6 - -4)

m = 5/-2

m = -5/2

Using the point slope form, plug in the values of the slope and one point to set up the equation.

(y - y1) = m(x - x1)

where m = -5/2 and (x1 , y1) = (-4 , 10)

(y - 10) = -5/2(x - -4)

y - 10 = -5/2(x + 4)

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Answer: 36

Step-by-step explanation:

XZ=XY+YZ

48=12+YZ

48-12=12-12+YZ

YZ=48-12

YZ=36

Answer:

[tex]81x {}^{6} - 108 { \times }^{5} + 54 { \times }^{4} - 12 { \times }^{3} + { \times }^{2} [/tex]

The vector PQ is given by the addition of the components of the two vectors i.e. →PQ = →Q + →P

Vector is a quantity having magnitude as well as direction and is used to denote the mathematical and geometrical direction of the given quantity.

For example : Velocity, Displacement etc.  

Let us first assume that,

P(x,y,z) and Q(u,v,w)

Now, we need to find the vector PQ

→PQ = →Q + →P

= (ui + vj + wk ) + (xi + yj + zk)

= (ui + xi ) +(vj  + yj) + (wk +zk)

= (u+x) i + (v + y) j + (w + z)k

= →PQ

For example : Let P(1,2,1) and Q ( -1, -2,4)

Then,  →PQ = →Q + →P

= (1i + 2j + 1k ) + (-1i + (-2)j + 4k)

=  (1-1) i + (2 -2) j + (1 + 4)k

= oi+0j +5j

= 5j

Hence, the vector PQ is given by the addition of the components of the two vectors.

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