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3 years ago

The difference between a number and 8 is 11

Mathematics

2 answers:

quester [9]3 years ago

6 0

Answer:

The difference between 19 and 8 is 11.

Step-by-step explanation:

Given:

The difference between a number and 8 is 11

Find the number.

Solution:

Let the unknown number be $=x$

The difference between the unknown number can be written as:

$x-8$

We are given that the difference =11

So we can write the equation to find $x$ as :

$x-8=11$

Using additive property to solve for $x$

Adding 8 to both sides to isolate $x$ on one side.

$x-8+8=11+8$

∴ $x=19$

∴ The unknown number = 19

vaieri [72.5K]3 years ago

6 0

Answer:

Step-by-step explanation:

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4.) Determine the missing side of a rectangle with an area of 480 cm² and a length of 32 cm. Please show your work.

asambeis [7]

Answer:

w = 15 cm

Step-by-step explanation:

We want to find the width, as the area of a rectangle is length (l) * width (w).

Since we know the area and the length, we have 480 = 32w

Isolating w by dividing both sides by 32 gives us w = 15 cm

8 0

1 year ago

The average of 5 quiz grades is 10. When the lowest grade is dropped and the new average is calculated, it turns out to be 11. W

V125BC [204]

Answer:

The score of the dropped grade is 6

Step-by-step explanation:

To find the average of a set of numbers you need to add all the numbers and divide by how many numbers there are. The problem wants you to solve it in reverse. Let put this into an algebraic equation with a, b, c, d, and e being the variables of the test scores

(a+b+c+d+e)/5=10

Then we can multiply both sides by 5 and get

a+b+c+d+e=50

Lets assume that c is the lowest test score. To calculate the average of that we get

a+b+d+e/4=11

Doing the same thing, we know that a+b+d+e=44

Now compare the two:

a+b+c+d+e=50

a+b+d+e=44

We can now know that c=50-44=6

So, 6 is the score of the dropped quiz. Hope that helped!

4 0

2 years ago

A, B, C, and D are the four angles of a parallelogram. a.Show that angle A = angle C

Thepotemich [5.8K]

Answer:

look at the pictures

Step-by-step explanation:

HOPE THIS helps

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2 years ago

Which posture or theorem proves that these two triangles are congruent

inysia [295]

Answer:

AAS Congruence Theorem

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2 years ago

Is 3 squared • 4 squares = 12? Evaluate each side of the equation

Paladinen [302]

No because 4 square equals 2 square and since 3 isn't a perfect number, it would be 2 square times 3 square, which equals 6 square.

8 0

2 years ago

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