Mathematics Middle School

Help me, please! I'll give a lot of points!

Solve the system of equations to find a and b.
a + b = 22
3a + 1b = 30
Explain how you got the answer (step-by-step) and name a particular method you used.
If the answer does not contain everything, I'll delete it. Sorry :/

Answers

Answer 1

Answer:

sorry

Step-by-step explanation:

how to do so good luck my friend

Related Questions

Figure A is a scale image of Figure B.

What is the value of x?

Answers

Answer:

18

Step-by-step explanation:

figure A has a relationship of 12:6 or 2:1. Applying this to figure B will give u 18 since 9 times 2 is 18

Answer:

18

Step-by-step explanation:

Trend lines
Help will be greatly appreciated!
The manager of fast food restaurant collected data to study the relationship between the number of employees working registers and the amount of time customers waited in line to order. He made a scatter plot of the data and credited a trend line with the equation y= -70x+300, where y is the total amount of time waited in seconds and x is the number of employees working registers.
1. Did the scatter plot of data positive, negative, or no association? Explain your reasoning.​
2. Maria went to the restaurant and waited 90 seconds to place her order. Use the trend line equation to predict how many employees were working.
3. Kiara went to the restaurant and waited 3.5 minutes. Use the trend line to predict how many employees are working.
4. Ashton walked into the restaurant and 4 employees are working registers. Use the trend line equation to predict how long he will wait to place his order.

Answers

Answer: the slope is 3 and the intercept is 0.

Step-by-step explanation:The trend line for the bivariate data shown in the scatter plot has the equation Y=3x

To determine the slope for a straight line (y=a*x+b)we take the two points that are shown and apply the following equation:

To determine the intercept we put the slope which we calculated into the equation for the point (2,6) and clear for b

For a school picnic, students are participating in a relay race. Each team has to fill a container that holds 200 liters of water, using bottles that hold 5 liters or 10 liters into the container. So far the blue team has poured ten 5-liter bottles and three 10-liter bottles into the container. How many more 10- liter bottles will the blue team need to fill the container

Answers

Since the blue team already poured ten 5 liters bottles so 10 x 5 = 50
And three 10 liters bottles so 3 x 10 = 30
Now you would add that up , 30 + 50 = 80
Then you subtract it from 200
200 - 80 =120
The last step is to divide by ten since it’s asking how many 10 liters bottles is need to fill the rest
120 divided by 10 =12
The blue team will need twelve 10 liters bottles to fill the container

5) h=? ( show the work please)

Answers

I think the answer is C

helpppppppp plssssssssssssss

Answers

Answer:

The SI unit of density is g/cm³ or kg/m³

it’s D ...... :D
explanation:

Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth's density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in metre-kilogram-second or SI units).

I need help with math please

Answers

Answer:

1: 3/4 = 6/8 = 9/12

2: 2/3 = 4/6 = 6/9

3: 8/9 = 16/18 = 24/27

Step-by-step explanation:

Answer:

1) 6/8 12/16

2) 2/3 4/6 6/9

3) 16/18 32/36

Lucinda is trying to show her brother a new magic trick with a deck of cards. If she asks her brother to draw a card from the deck. What is the probability that he will draw an ace?

A. 1/52
B. 1/50
C. 1/13
D. 1/4

Answers

Answer:

c

Step-by-step explanation:

4 aces in 1 deck of 52 cards 52/4 = 13, 4/4 = 1

which means 1/13

C. 1/13. This is because there is 4 aces in a deck of cards. And each deck has 52 cards. 4/52 simplify to 1/13

The difference between 9 times a number and 5 is 40. Which of the following equations below can be used to find the unknown number?

Answers

Where is the picture
I don’t see any choices, but who cares? It would be 9x - 5 = 40

Uhhh help pls :D.....

Answers

He needs 3 boxes.

He has 7 friends and they each get 4 cookies so
7x4=28

If each box has 12 cookies then you can divide the amount of cookies you need by the amount in each box and get
28/12=2.333...

And since we don’t want to leave any of his friends cookieless we need to round up to 3 boxes

Which number line shows the graph of x≤6
?

Answers

Answer:

C

Step-by-step explanation:

There is a line under the "<" sign which means that "x" can be equal to 6. The arrow going left shows that x is less than 6 and the dot being shaded mean that 6 can be an answer so the number line C is the answer. Hope this helped:)

The required number line that shows the expression x ≤ 6 is figure C. Option C is correct.


What is inequality?

Inequality can be defined as the relation of the equation containing the symbol of ( ≤, ≥, <, >) instead of the equal sign in an equation.

What is a number line?

A number line is defined as the number marked on the line calibrated into an equal number of units. For example -1, 0, 1, and so on.

Here,
The expression x ≤ 6 implies that the domain of the x is a set of a real number less than and equal to 6, so all values represented on the number line below and equal to 6 is bold dark.

Thus, the required number line that shows the expression x ≤ 6 figures C. Option C is correct.

Learn more about number line here:

brainly.com/question/17683084

#SPJ2

helpppppppppppppppppppppp

Answers

Help we need help!!!
It should be G because G is a number

8(6/3)
8(2)
16

While the others have variables needed

please help PLEASE PLEASE !!!!
determine the area of the composite figure
14in
10in
8in

*it wont let me add the pic *

Answers

Answer:

39.19184 Units^2

Step-by-step explanation:

Assuming it is a triangle using area of oblique triangles; A = 1/2(a)(b)sin(C)

which property is demonstrated below
b(c+d)=(bxc)+(bxd)

A) inverse property
B) distributive property
C) commutative property
D) identity property


pls no files, just answer

Answers

B! Distributive property covers how you can ✨distribute✨ a multiplying factor within an equation. It makes the process simpler to look at, and easier to understand :)
B i s t h e a n s w e r

How much interest is earned in 8 months if $6000 is invested at an 5% annual interest rate?
$240
$2,000
$200
$2,400

Answers

Answer:

its 2,400

Step-by-step explanation:

Answer:

2,400

Step-by-step explanation:

I = P x R x T

I = 6,000 x (5%) (8 months)

Help The question is down below!

Answers

28 all you have to do to find the area of a triangle is multiply using l x w and divide in half.
28 just multiply !!!!!!!!!!!!!

Calculate the slope of the line using two different pairs of points.




Enter the slope.

m=_______?

Fill in the blank.

Answers

Rise/run = 20/20 = 1
m = 1
Ok find two points
(0,20) and (20,0)
Slope formula: (y2-y1)/(x2-x1)
(0-20)/(20-0) = -20/20 = -1
Solution: m = -1

BRAINLIEST if correct



5

Answers

Answer:

True

Step-by-step explanation:

It shows favoritism

Answer:

its true

Step-by-step explanation:

Find the length of y in feet. (Similar angles or sides, I think)

Answers

Answer:

y = 8 ft

Step-by-step explanation:

By the midsegment theorem; QS or y = [tex]\frac{1}{2} (PO)[/tex]

y = [tex]\frac{1}{2}(16)[/tex]

y = 8

Hope this helps!

Liam is setting up folding chairs for a meeting. If he arranges the chairs in 6 rows of the same length, he
has 7 chairs left over. If he arranges the chairs in 4 rows of that same length, he has 13 left over. How many
chairs does Liam have?

Answers

We will need to have two equations here, having x as the missing length. We know that the chairs are in the same amount on each occasion, so each equation should be equal to the other.

This sets up a problem of:

6x + 7 = 4x + 13

7 and 13 being the leftover chairs and 6 and 4 being the rows. Let’s solve for x.

x = 3

Knowing this, we plug in x for one of the equations

6(3) + 7
18 + 7
25

Liam has 25 chairs.

Determine if the value of each expression is greater than 1 1 or less than 1 1. Select from the drop-down lists to complete the table.

Answers

Answer:

The first one is greater than 1.

The second one is less than 1.

The third one is greater than 1.

The fourth one is less than 1.

The fifth one is less than 1.

again im sorry- only a few more questions and I can chill though xD

Answers

Answer:

X might be 25 I am SOOOO sorry if im wrong.

Step-by-step explanation:

X=354

Explanation- Quadrilaterals add up to 360 degrees, so add up all sides, which equals 6, then subtract 6 from 360; which now equals x=354.

Hope this helps, sorry if I am wrong. Have a nice day, and good luck.

Find the surface area of the prism

Answers

Answer:

Hello! answer: 288

Step-by-step explanation:

To find surface area you have to do base × height for each face then add them up so.....

40 + 40 + 64 + 64 + 40 + 40 = 288 Hope this helps!

Anyone with a knee injury or any doctor! What does it mean if my knee popped locked up all in like 1.5 seconds and then it now hurts to bend but not alot and i can wiggle my kneecap like a lot. This is the 2nd time in like 7-9 months! Please help! Comment if there is no more answers left!

Answers

Answer:

Knee pain can have causes that aren't due to underlying disease. Examples include heavy physical activity, lack of use, injuries such as sprains or strains, sitting in a constrained area, or sitting on knees for a prolonged period.

Step-by-step explanation:

possibly Chondro malacia

Damage to the cartilage under the kneecap.

Symptoms may include

Knee pain

Cracking joints

Swelling of the knee

Please go to your doctor...ik it hard with cov id and everything

It could be hereditary, or it could just be a weak muscle. I have knee problems. If it’s just your knee cap that is dislocating you can do simple exercises to strengthen the muscle around it to hold it in place. If it’s your actual knee you should get it checked out to see if there is anything else going on. If it continues and there’s nothing “wrong” they’ll have you do physical therapy. When this dislocation happens, keep your knee up above your heart and ice it. After you pop it back on. And take pain relief. Wear a knee brace as well

ad astria avasaqu, WELCOME TO THE ADVENTURES GUILD. Yea an someone help with these 4 questions. And leave a comment under my question if u play genshin impact. Don't forget to answer the question/

Answers

Answer:

29.75

Step-by-step explanation:

if the cost of 3 scarves is 89.25, you divide that by three and you have your answer.

Answer:

29.75

Step-by-step explanation:

89.25 divided is that

Mrs. Johnson put a fence around the basil. If she fence is 2 ft from the edge of the garden on each side, what is the perimeter of the fence in feet?

Answers

The perimeter would be 8ft because 2+2+2+2= 8

The perimeter of the fence is 23 1/2 ft

I need help.
I did the first question for you guys.
20 points.

Answers

I can’t see the photo ?

Use the expression below.
-4b + 8c + 12 - 8b - 2c + 6
Part A
Simplify the expression.

Part B
Factor the simplified expression using
the GCF.

Part C
What is the value of the expression
when b = 2 and c = -3?

Answers

Answer:

Part A) − 12 b  +  6 c  +  18

Part B) -2b + 1c + 3

Part C) -4

Step-by-step explanation:

Part A)

Step 1:

-4b + -8b = -12b

Step 2:

8c + 2c = 6c

Step 3:

12 + 6 = 18

Answer: − 12 b  +  6 c  +  18

Part B)

GCF = 6

Step 1:

-12 divided by 6 = -2b

Step 2:

6 divided by 6 = 1c

Step 3:

18 divide by 6 = 3

Answer: -2b + 1c + 3

Part C)

Step 1: Subsitute 2 for b and 3 for c

(− 2 x 2 )  +  (1  x -3) +  3

Step 2: Multiply (− 2 x 2 )  +  (1  x -3) +  3

-4 + (-3) + 3

Step 2: Add -4 + (-3) + 3

-7 + 3 = -4

Answer: -4

Angelique wants to have a rug that is 9 feet long, 7 feet wide. the rug will cover the whole floor except a border that is x feet wide.the area of her room is 167 sq ft. find x

Answers

The width of the border will be about 2.5 feet.

The area of the rug is 9 by 7. Let's call the width of the border x. Therefore, the length of the rug will switch to 9 + 2x. The border is on both sides of it, so we add on 2x. Then, the width is 7 + 2x.

The area of the room is therefore: (9 + 2x)(7+ 2x).

We know the area of the room, so we can write and solve the following equation.

(9 + 2x)(7 + 2x) = 167
4x^2 + 32x + 63 = 167
4x^2 + 32x - 107 = 0

At this point, use the quadratic formula and x will equal about 2.5.
The answer is 2.5 . Hoped this helped

All tabby cats in Imagineville have white paws. A female cat in Imagineville has white paws. Which of the following must be true?

Answers

A
A
A
A
A
A
A
A
A
A
A
A
A

A
A
A
A
A
A
A
A
A
A
The answer to this question is A

what is the value of this expression (2^2/2)^2

32
128
64
16

Answers

Answer: 16 :)1

Step-by-step explanation: Explanation: Just trust me :)

Also, could you mark me brainliest? Its fine if not :)

The correct answer is 4 trust me this is correct :)
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