MATHEMATICS MIDDLE SCHOOL

PLEASE HELP ME WITH THIS AHHHH 15-(21)

Answers

Answer 1

Answer:

Answer:

-6

Step-by-step explanation:

Answer 2

Answer:

Answer:

Is it 15 Minus 21 (Or) 15 x -21

Step-by-step explanation:

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The letters A,B,C and D each stand for a different single digit. Use the clues to find the digits. Clues: C is greater than 1. C is an odd number. B and Dr are even numbers. What number does D stand for?

Solve for x. 4x−4<8 AND9x+5>23

Answers

The solution for 4x - 4 < 8 is x < 3

The solution for 9x + 5 > 23 is x > 2

The given inequality is:

4x - 4 < 8

Add 4 to both sides

4x - 4 + 4 < 8 + 4

4x < 12

Divide both sides by 4

$(4x)/(4) < (12)/(4) \nx < 3$

The second inequality is:

9x + 5 > 23

Subtract 5 from both sides of the inequality

9x + 5 - 5 > 23 - 5

9x > 18

Divide both sides by 9

$(9x)/(9) > (18)/(9)\nx > 2$

The solution for 4x - 4 < 8 is x < 3

The solution for 9x + 5 > 23 is x > 2

Learn more here:brainly.com/question/17448505

Can u tell me how to solve this promblem 4/7 plus 3/7

Answers

The answer to your question is: Yes, I can.
=================================
Although you haven't asked me to actually show you how, I'm already here
so I might as well just go on through it.

Before we tackle that math problem, I want to discuss a couple of other
different ones, and I want you to solve both of them.

Problem #1:    4 (cows) + 3 (cows)
Can you solve it ?
Did you say " 7 (cows) " ?
Nice work.

Problem #2:   4 (blue bicycles) + 3 ( blue bicycles)
This one is a little harder.
Can you solve it on your own ?
What's that ? Did you say " 7 (blue bicycles) " ?
Excellent !

I think you're ready for the original problem now:

   4 (sevenths) + 3 (sevenths) = ?

I hope you said " 7 (sevenths) " .
You did ? Terriffic !
That's the correct solution . . . . . ⁷/₇.

Teachers usually want to see fractions simplified. That doesn't
change the answer, it's just a neater way to write it.

Any fraction that has the same number on top and bottom is always the same as ' 1 '.

⁷/₇ = 1 , so if you see the answer to this one in a book, it'll say ' 1 '.

It's pretty simple..
All you do is think about the numerator (the top number)
And the denominator (the bottom number)

If the denominators are the same number (which they are) then you keep that the same

And the numerators must be added together

In this case it would be 4+3 = 7

And the denominator stays the same
So your answer will be 7/7

If you want to get even higher with your answer, you can mention how 7/7 is also a WHOLE number

Which property would you use to simplify the following expression? 5(y+7)

Answers

Distributive property.

IDK but the answer is 5y+35

The Area of a rectangular patio is 5 5/8 square yards,and it's length is 1 1/2 yards.What is the patio's width,in yards?

Answers

Take both mixed numbers (a whole number plus a fraction) and turn them into improper fractions ( a numerator (top number) bigger than the denominator (bottom number). To do this, multiply the denominator by the whole number, and add the result to the numerator.
5 5/8 will become 45/8
1 1/2 will become 3/2.
Area is length* width, so width would be Area/ length. So 45/8 is the area and 3/2 is the length. Now you have (45/8)/(3/2). To divide fractions, take the second fraction and flip the numerator and denominator, forming the reciprocal (2/3). Now multiply 45/8 and 2/3
The result is 90/24, and simplifying would get 15/4, or 3 3/4. This is the width(or length)

Answer:

8 7/16

Step-by-step explanation:

A test has 20 questions worth 100 points. The test consists of true/false questionsworth 3 points each and multiple choice questions worth 11 points each. How many multiple choice questions are on the test? A. 10 mc, 10 t&f
B. 7 mc, 13 t&f
C. 2 mc, 18 t&f
D. 5 mc, 15 t&f

Answers

answer is D) 5 mc, 15 t&f
you have two unknown variables, thus you need two equations

definitions:
a = quantity of multiple choice questions
b = quantity of true and false questions

100 points = a*11 points/question + b*3 points/question
20 questions = a +b

using 2nd equation, find equation for 'a':
a = 20 - b

substitute this equation for 'a' into 1st equation:
100 = 11a + 3b
100 = 11(20 - b) + 3b
100 = 220 - 11b + 3b
100 - 220 = -8b
-120 = -8b
-120/-8 = b
15 = b

resolve 2nd equation now knowing value of 'b':
a = 20 - b
a = 20 - 15
a = 5

verify solution is correct by substituting values into first equation
11a + 3b = 100
11(5) + 3(15) = 100
55 + 45 = 100
100 = 100 [OK]

verify solution is correct by substituting values into second equation
a + b = 20
5 + 15 = 20
20 = 20 [OK]

Final answer:

There are 5 multiple-choice questions on the test.

Explanation:

The total number of points for the test is 100. Let's assume there are x multiple-choice questions on the test. Each multiple-choice question is worth 11 points. So the total number of points for multiple choice questions is 11x. The remaining points, 100 - 11x, are for the true/false questions, each worth 3 points. To find the number of multiple-choice questions, we need to solve the equation: 11x + 3(20 - x) = 100.

Simplifying the equation gives us: 11x + 60 - 3x = 100. Combining like terms gives us: 8x + 60 = 100. Subtracting 60 from both sides gives us: 8x = 40. Dividing both sides by 8 gives us: x = 5.

Therefore, there are 5 multiple-choice questions on the test.