Mathematics High School

What is the value of x? X - 9 = 21

Answers

Answer 1

Answer:

X=30

Step-by-step explanation:

First do the inverse which is 9 add 21 which is 30

Then u do 30-9 which equals 21 to clarify the answer

Answer 2

Answer:

[tex]x=30[/tex]

Related Questions

PLSSS HELP SHOW WORK TOO
dis is worth 40 points bro and no steps then im deleting your response.

Elaina’s old bicycle had tires with a 12-inch diameter. Her new bicycle has tires with a 16-inch diameter. What is the difference in the circumference of the tires?

Answers

12x3.14= 37.68,
16x3.14= 50.24
The difference is 12.56

True or false: This equation is a linear function.
y= r3 + 3
O True
O False

Answers

Answer:

true

Step-by-step explanation:

....................

The answer is true, it is a linear function

What is the sum of -4 and -6?
-2
-10
2
10

Answers

Answer:

B..-10

Step-by-step explanation:

this isn't wrong I promise!

Answer:

-10

Step-by-step explanation:

bc: 4 + 6 is 10 and if it is negative start on 6 and go back 4 spaces which is -10

What is the area of the figure?
6 m
6 m

Answers

Answer: 36

Step-by-step explanation:

h x l = a

h=6

l=6

6 x 6 = 36

the area of the figure is 36

A team in science class placed a chalk mark on the side of a wheel and rolled the wheel in a straight line until the chalk mark returned to the
same position. The team then measured the distance the wheel had rolled and found it to be 25 cm. To the nearest tenth, what is the area of
the wheel?

49.7 cm?
198.9 cm?
99.5 cm
19.6 cm?

Answers

Answer:

49.7 [tex]cm^{2}[/tex]

Step-by-step explanation:

Although it is hidden a bit, we are actually given the circumference of the circle, which is 25 cm.

We know that C = 2πr, so we can substitute variables to find the radius (r).

25 = 2πr

r = 25/(2π)

r = 3.9788... cm

The area of a circle is A = π[tex]r^{2}[/tex], so:

A = π [tex]3.9788^{2}[/tex]

A = 49.7359... [tex]cm^{2}[/tex]

A ≈ 49.7 [tex]cm^{2}[/tex]

Multiple Choice Probability is a measure of how likely an event is to occur. Choose the
best probability for an event that is impossible.

a.0

b. 0.01

0.3

d. 0.6

e. 0.99

f. 1

Answers

Answer:

Step-by-step explanation:

it should be a if it is impossible there is a 0 chance that it will happen

simplify (18.6 x d) x 3

Answers

Answer:

(18.6 x d) x 3 = 55.8d if the X's are multiplication signs

(18.6xd)x3 = 18.6dx4 if the X's are variables

Step-by-step explanation:

HELPPPPPP
Are these pairs a function WHY/WHY NO
(0,3)
(1,6)
(2,12)
(3,24)
(4,48)
(5,96)

Answers

Answer:

Step-by-step explanation:

Yes these pairs are a function because no two numbers are the same in any of the (x,y) pairs

I don't know how to do math that good so i need help with math

Answers

Answer:

sure i can definitely help

Step-by-step explanation:

whats your problem?

How many terms are in this expression?
1 + 9u
I
Submit

Answers

The answers is

2

Hope this helps

Factor the quadratic expression.

3x2 − 8x + 4

Answers

Answer:

(3x - 2) (x - 2)

Step-by-step explanation:

im smart

First multiply 3 and 4 to get 12. Now, we must get two numbers that multiply to 12, but also add to -8. The answer is -6 and 2.

Now rewrite this expression as “3x^2-6x+2x+4.

Now, group together each set of two terms and find the GCF of each. The GCF of 3x^2 and -6x is -3x. The GCF of 2x and 4 is 2.

Now, divide each group by the GCFs and place them next to each other. You should get -3x(x+2)+2(x+2). We know this is correct because the parentheses match.

Now, rewrite the duplicate factors as one, and group together what is outside the parentheses. The final answer is...

(-3x+2)(x+2).

To check, you can double distribute (FOIL) to see if it matches the original expression.

can someone help me out plz

Answers

I think [tex]\left \{ {{y=-3,-6,-7,-6,-3 } \atop {x=-5,-4,-3,-2,-1}} \right.[/tex]

A point is the origin if and only if its coordinates are both zero.
(True or False?)

Answers

Answer:

It's true!.!!

Brainliest?

Hope you have a good day!

The center of the coordinate system (where the lines intersect) is called the origin. So TRUE

How many total possible outcomes are there in the sample when you are flipping 3 coins: a penny, a nickel, and a dime?
O4
O 6
08

Answers

8 because when you flip one coin there is 2 outcomes: heads and tails. Therefore if you flip 3 of them it is 2*2*2=8

At the beginning of an experiment, there are 400 grams of contaminants. Each hour, three-fourths of the contaminants are filtered out.

Use the model to calculate the number of contaminants after the third hour of the experiment.

the answer is not 168.75 cause that is how much filtered/went away. I need to know how much is left after it was filtered.

Answers

Answer:

18.75

Step-by-step explanation:

first hour: 400×(1/4) = 100

second hour: 100×(1/4) = 25

third hour: 25×(1/4) = 18.75

but i have to give credit to the first answerer, this is not my answer, though i know how to do it i dont know how to explain it properly.

the first term of a geometric series is 124. The sum to infinity is 64 . Find the common ratio

Answers

9514 1404 393

Answer:

-15/16

Step-by-step explanation:

The sum of a geometric series with first term a1 is ...

S = a1/(1 -r)

Then the common ratio (r) is ...

r = 1 -a1/S

For the given values, the ratio is ...

r = 1 - 124/64 = -15/16

The common ratio is -15/16.

Find all angles, 0° of a degree.
tan^2 theta - 6tan theta + 5 = 0
(can you PLEASE explain how to do this in simple terms I can’t find a helpful video lol)

Answers

x = 0.7554, 1.3734, 3.927, and 4.515 Try That And See.

Question 6
Barry has a table with a diameter of 60 inches. What is the radius of the table?
PLZ HELP I HAVE TO SUMBIT IN 29 MIN

Answers

radius is half of diameter, so 30 inches

One of the sisters decides that she isn't feeling well. She only wants a sprite and volunteers the remaining money to the others. How much do the other four sisters have to spend? There are 4 sisters each have $10.00

Answers

Answer:

First of all. On that page, theres 5 sisters. Gabby is included. so not 4, 5.

Step-by-step explanation:

Zx and Zy are supplementary angles. Zy measures 142º.
What is the measure of Zx?

Answers

Answer:

Supplementary angles means the sum will be 180 degrees. So since Zx = 142 degrees, allow: 180 = 142 + Zy. So, 180 - 142 = 38 degrees = Zy.

Step-by-step explanation:

Which equation is true when t = 3.5?
A 0.5t - 3 = 1.72
B -15 + 2t = -8
C 3(t - 8) = 2.5
D 8t - 6 = 34

Answers

Answer:

Step-by-step explanation:

-15+2×3.5=-8

-15+7=-8

-15+2x3.5=-8
-15+7=-8
-15=-8-7
-15=-15
So, the answer is b

What is the slope for this equation in linear function y=2/3x-2

Answers

Answer:

2/3

Step-by-step explanation:

y=mx+b where m=slope and b=y-intercept.

Easy!
I’ll mark as ✨brainliest✨
Very easy.

Answers

The number of planes in a year will be 219000 planes.

How to calculate the value in a year?

Rate demonstrates how many times one number can fit into another number. Rate contrast two numbers by ordinarily dividing them. A/B will be the formula if one is comparing one data point (A) to another data point (B).

Here, 150 planes arrive in 6 hours. The number of planes in a day which is 24 hours will be:

= 150 × (24/6)

= 600 planes.

The planes in a year will be:

= 600 × 365

= 219000 planes.

Learn more about rate on

brainly.com/question/25537936

#SPJ1

For 25 points:
x + 5 = 10
2x + ? = 20
Answer for "?"

Answers

Answer:

x= 5

?=10

Step-by-step explanation:

Mark me Brainliest Pls

-39<5x+36 step by step explanation

Answers

Answer:

x > -25.

Step-by-step explanation:

-39 < 5x + 36

Subtract 36 from both sides:

-39 - 36 < 5x + 36 - 36

-75 < 5x

5x > -75

Divide both sides by 5:

x > -25.

PQ=RQ what does b =

Answers

...... ....as i said,b = 17

solve the inequality 3x+5≤ 11

Answers

Step-by-step explanation:

done.................

find area round to nearest hundredth

Answers

Answer:

area = 693

Step-by-step explanation:

The area of a quadrilateral can be found using the formula; base * height

It is given that the height is 33, the base is 21;

Multiply the two

21 *33 = 693

The function c ( x ) = 63 ⋅ ( 1.03 ) x models the cost in dollars, c , of 1 ounce of a certain chemical used in a laboratory. x represents the number of years since 1990.

Does the cost of the chemical increase or decrease with time?

Group of answer choices

Increase

Decrease

Answers

9514 1404 393

Answer:

increase

Step-by-step explanation:

Your cost function appears to be an exponential function of the form ...

c(x) = (initial cost)·(growth factor)^x

When the growth factor (1.03) is greater than 1, it means the exponential function is increasing with x (time).

The cost function increases with time.

Jacob went on a fishing trip. This year he caught 30 fish, which is six more than twice the number he caught last year. How many fish did Jacob catch last year?

Answers

Answer:

12 fish

Step-by-step explanation:

You need to work this problem backwards. If he caught 30 fish, which was six more than twice the number he caught last year, you would start by subtracting six, leaving you with 24. Then you'd have to divide by 2, because it was twice plus six as many fish, which would give you 12 fish.

[tex]\frac{30-6}{2}[/tex] = x

[tex]\frac{24}{2}[/tex] = x

12 = x

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