MATHEMATICS MIDDLE SCHOOL

This question is confusing me look at the screenshot pls help

Answers

Answer 1

Answer:

Answer:

The answer is 7.1

Step-by-step explanation:

Answer 2

Answer: Yah 7.1 should be correct

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What is the average of 45 and 19

Answers

$(45+19)/(2) =(64)/(2) =32$

The average of 45 and 19 is 32.

Four times what equals thirty?

Answers

Hi there!

Great question! :D

To figure out our unknown value, we can replace our unknown value, or blank space, with x.

So our equation would look something like $4x = 30$

We have a variable next to a number to show we are multiplying. But since we're figuring out an unknown, we'll do the opposite, which is division.

$4x = 30$

We'll divide both sides by our 4.

$(4x)/(4) = (30)/(4)$

We can eliminate the variable right away on our left side of our equation. This makes it look like there's not a lot of steps through solving.

$(30)/(4) = 7.5$

Final answer:

$x = 7.5$

When in doubt of your answer, we can multiply 4 by 7.5 and see what we get. We should get 30.

$4 * 7.5 = 30 :)$

We were right!

Hope this helps! :D

4x=30
4x/4=30/4
x=7.5

Hope this helps!!

7. Justin takes his pulse and counts 18 heart beats in 15 s.a) What is his heart rate in beats per second?
b) What is his heart rate in beats per minute?
c) What is his heart rate in beats per hour?

Answers

Answer:

18÷15=a

18÷15×60=b

18÷15×60×60=c

Can someone please help me in math it is really hard 1) A bag contains 13 pens and 18 pencils. What is the ratio of pens to pencils?
a) 31 to 13
b) 18 to 13
c) 13 to 31
d) 13 to 18
2) A vase contains 12 tulips and 20 roses. What is the ratio of roses to the total number of flowers in the vase?
A.3 to 8
B.3 to 5
C.5 to 8
D.5 to 3
3) A neighborhood has 32 one-story homes and 24 two-story homes.
What is the ratio of two-story homes to one-story homes in simplest form?

4) Sylvia has a total of 16 trading cards: 8 superhero cards, 4 princess cards, 2 villain cards, and 2 wildlife cards.
What is the ratio of wildlife cards to the total number of trading cards in simplest form?

5) A bake sale has 12 cookies, 9 pies, 8 cakes, 4 tarts, and 3 cobblers to sell.
What is the ratio of the total number of baked goods to cobblers in simplest form?

Answers

Q1. The answer is d) 13 to 18

There are 13 pens and 18 pencils. Ratio of pens to pencils can be written as:
pens : pencils

Since pens = 13 and pencils = 18, then
pens : pencils = 13 : 18

Or in other words, ratio of pens to pencils is 13 to 18. Thus, choice d) is correct.

Q2. The answer is C.5 to 8

There are 12 tulips and 20 roses. The total number of flowers is 12 tulips + 20 roses = 32 flowers. Ratio of roses to the total number of flowers can be written as:
roses : total flowers

Since roses = 20 and total flowers = 32, then
roses : total flowers = 20 : 32

Now, let's simplify 20 to 32 ratio:
20 : 32 = (20 / 4) : (32 / 4) = 5 : 8

Or in other words, ratio of roses to the total number of flowers is is 5 to 8. Thus, choice C. is correct.

Q3. The answer is 3 : 4

There are 30 one-story homes and 24 two-story homes. Ratio of two -story homes to one-story homes can be written as:
two-story homes : one-story homes

Since one-story homes = 32 and two-story homes = 24, then
two-story homes : one-story homes = 24 : 32

Now, let's simplify 24 to 32 ratio:
24 : 32 = (24 / 8) : (32 / 8) = 3 : 4

So, the ratio of one-story homes to two-story homes is 3 to 4.

Q4. The answer is

There are 16 trading cards and 2 wildlife cards. Ratio of wildlife cards to total trading cards can be written as:
wildlife cards : trading cards

Since trading cards = 16 and wildlife cards = 2, then
wildlife cards : trading cards = 2 : 16

Now, let's simplify 2 to 16 ratio:
2 : 16 = (2 / 2) : (16 / 2) = 1 : 8

So, the ratio of wildlife cards to total trading cards is 1 : 8

Q5. The answer is

There are 3 cobblers. The total number of baked goods is 12 cookies + 9 pies + 8 cakes + 4 tarts + 3 cobblers = 36 baked goods. Ratio of the total number of baked goods to cobblers can be written as:
baked goods : cobblers

Since baked goods = 36 and cobblers = 3, then
wildlife cards : trading cards = 36 : 3

Now, let's simplify 36 to 3 ratio:
36 : 3 = (36 / 3) : (3 / 3) = 12 : 1

So, the ratio of the total number of baked goods to cobblers is 12 : 1

I just did a worksheet and have answers 4 and 5 wrong!^^^^ the answer to 4 is 1/4 the answer to 5 is 4/1

I need to solve for x and y. Any help is greatly appreciated! Thank you!

Answers

x=-3, y=1

Step-by-step explanation:

Given equations are:

2x-3y=-9 Eqn 1

x+y = - 2 Eqn 2

From eqn 2:

$x=-y-2$

Putting x=-y-2 in eqn 1

$2(-y-2)-3y=-9\n-2y+4-3y=-9\n-5y-4=-9\nAdding\ 4\ on\ both\ sides\n-5y-4+4=-9+4\n-5y=-5\nDividing\ both\ sides\ by\ -5(-5y)/(-5)=(-5)/(-5)\ny=1\nPutting\ y=1\ in\ eqn\ 2\nx+1=-2\nSubtracting\ 1\ from\ both\ sides\nx+1-1=-2-1\nx=-3$

Hence,

x=-3, y=1

Keywords: Linear equations, Variables

Learn more about linear equations at:

#LearnwithBrainly

Question 1 (1 point)Select all solutions to the equation.
3x – y=10
Only (4,-2)
Only (3, 1)
Both (4, -2) and (3, 1)
Neither

Answers

The answer is Neither

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