Mathematics Middle School


The triangle below has a total perimeter of 450 cm:

picture of a triangle with sides 128 and 150. Third side unknown

Write an equation and solve it to find the length of the longest side of the triangle.

Answers

Answer 1
The third is 450-(128+150)=450-150-128=300-128=172
So the longest side is 172 cm

Related Questions

What is 3v+6v(4v-2v)

Answers

3v + 6v(4v - 2v)
3v + 6v(2v)
3v + 12v²

3v(4v + 1)   is your answer

hope this helps
9v(2v) which equal 18v

the tax on a property with an assessed value of $120,000 is $300. find the tax on a property with an assessed value of $140,000.

Answers

the answer is $12,300 not $140,000
$12,300 is the answer

1. simplify 6^2+ 3^2
2. 4^3+ 4.5

Answers

1. 45
2. 68.5


please mark me brainliest!!!
1. Use the correct order of operations and do the exponents first.
Remember that an exponent of 2 means to multiply the base by itself, not multiply the base by 2.

6^2+ 3^2 = 6 * 6 + 3 * 3 = 36 + 9 = 45

2. 4^3 + 4.5 = 4 * 4 * 4 + 4.5 = 64 + 4.5 = 68.5

What is the distance between −131 and −87 on a number line?

Answers

THE distance betweem -131 and -87 is 44 

(-131) - (-87)= 44 

You dont add a negetive sign because you are finding the distance  

Michell bought 5 packs of crayons for $13.75 what's the coust of one pack?

Answers

All you would do is divide for this problem so, 


13.75 ÷ 5 = 2.75

So one pack would cost 2.75

(:
The answer is two dollars and seventy five cents

two sides of a triangle have lengths of 10 and 15. Between what two numbers does the length of the third side lie?

Answers

Since the sum of two sides of a triangle must be greater than the third. You must subtract the two known to get the lower bound. And add the two to get the upper bound. This will give you between 5 and 25

Evaluate 13 + ab, when a = 2.5 and b = 3. A. 46.5 B. 20.5 C. 18.5 D. 19.5

Answers

When variables are touching, that means after plugging them in, we multiply.
So the equation becomes 13 + axb 
Lets fill a and b in:
13+(2.5)(3)
In the order of operations (or PEMDAS),we must multiply first. 
2.5 x 3 =7.5
Then the equation becomes:
13 + 7.5
No you just add to get your answer which is (B)20.5
Hope this helps!

Answer:

the answer is b

3868000000 in scientific notation

Answers

the scientific notation is 3.868x10^9

a plane takes off at 6 am, traveling north at 270 mph. a jet takes iff at 7 am, traveling north at 460 mph. at what time will the jet overtake the plane?

Answers

Remember the distance-rate-time f[tex]t = 0.704 hrs[/tex]ormula:
[tex]d=rt[/tex]

Now, if the jet overtakes the plane, then at some point their distances will be the same. This means their rate * time will be equal.

Let's call the rate for the first plane, r1, and the rate for the second plane, r2. If we set time as t, then we can create ourselves a formula. However, we have to add one to the time of the first plane since it leaves one hour earlier. In the end, we should have something like this:
[tex]r_{1}(t+1)= r_{2}t [/tex]

If you plug in the values, you should get:
[tex]t = 0.704h[/tex]


what expression is equivalent to 2.2-2.5?

Answers

Hi Camrynb10705oxknsv!
So let's take a look at the answers they give. A is 2.5 - 2.2 and all that is is switching the numbers so that isn't right. B they do addition instead of subtraction so that can't be right. C they do 2.2 + (-2.5) and when you add a negative number it's like subtraction because a negative number is under 0 and so your adding a number under 0 so you go down. So the answer is C.
If you need me to explain it different let me know. Hope this helps!
The answer is C. How we know:
The origional expression would equate to -0.3
The reason A is incorrect is that you can not change the order of subtraction. This answer equates to 0.3.
The reason B is incorrect is that adding is not the same as subtracting. This answer equates to 4.7.
The reason D is incorrect is that subtracting a negative is the same as adding. This would equate to 4.7
The reason C is correct is that adding negative is the same as subtracting. This would equate to -0.3.

After a 20% increase the new price of radio is $78.00. What was the original price of the radio

Answers

The original price was 65. 

78/ 1.2 = 65

If you invest $3,900 at a 7.83% simple annual interest rate, approximately how long will it take for you to have a total of $10,000?
a.
12 years
b.
15 years
c.
20 years
d.
30 years

Answers

It's c 20 years hope this helps:)

we know that

The simple interest formula is equal to

[tex]A=P(1+rt)[/tex]

where

A is the Final Investment Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

in this problem we have

[tex]t=?\ years\\ P=\$3,900\\ A=\$10,000\\r=0.0783[/tex]

substitute in the formula above

[tex]10,000=3,900(1+0.0783t)[/tex]

Solve for t

[tex]10,000/3,900=(1+0.0783t)[/tex]

[tex](10,000/3,900)-1=0.0783t[/tex]

[tex]0.0783t=1.5641[/tex]

[tex]t=1.5641/0.0783[/tex]

[tex]t=19.98\ years[/tex]

therefore

the answer is the option C

[tex]20\ years[/tex]

find the coordinates of the orthocenter for a triangle with vertices (1,3) , (1,12) , (8,10)

Answers

the orthocenter is (3,10) I think
For convenience, I'll name the three points: A(1, 3), B(1,12), C(8,10)

The orthocenter is where the three altitudes of the triangle meet. That is, where the perpendicular lines from each vertex to the opposite side meet.

the goal in this case is to find out where the perpendicular line from C to AB, the perpendicular line from B to AC, and the perpendicular line form A to BC meet.
It is enough to find two perpendicular lines.

step one: find the equation of two perpendicular lines

find the slope of AB: m=(12-3)/(1-1), notice the denominator is 0, so the slope doesn't exist, that means AB is a vertical line parallel to the y axis, so the perpendicular line has a slope of o, a horizontal line. this horizontal line goes through C(8,10), so the equation is y=10
use the same method, slope of AC: (10-3)/(8-1)=1, so the perpendicular line from B to AC has a slope of -1. y=-x+b
Now use the point B(1,12) to find b: 12=-1+b =>b=13

so the equation for this line is y=-x+13

Step two: solve the system of equations: y=10
                                                                  y=-x+13
we get x=3, y=10, which are the coordinates of the orthocenter.

I've also found the equation of the third line, which is y=(7/2)x-1/2, the point (3,10) is also on this line. So it works!

I need to find the LCD or LCM for this equation I Also need with n is please help ... 3/4n-18=1/4n-14

Answers

3/4n - 18 = 1/4n - 14

We need to isolate "n"

So, add 18 to both sides.

3/4n = 1/4n - 14 - 18

Then, subtract 1/4n from both sides.

3/4n - 1/4n = -14 - 18

*Note : Since "n" has the same denominator (bottom number in a fraction), then we simply need to look at the top numbers (numerators) and simplify those.

Simplify.

2/4n = -32

Then, multiply both sides by 4 so that we get rid of fractions.

4 · 2/4n = -32 · 4

Simplify.

2n = -128

Now, divide both sides by 2.

2 ÷ 2n = -128 ÷ 2

Simplify.

n = -64

~Hope I helped!~ 

:)

8+x/-9=9

Please solve this equation and show your work!

Answers

8+(x/-9)=9               subtract 8 

x/-9= 1                     multiply by -9 

x= -9

(8+x)/-9=9
-9×9=8+x

-81-8=x

X=-89

there are four cups in a quart and 4 quarts in a gallon how many cups are in a 5-gallon jug of water

Answers

80 cups is the answer to this problem
80 because 5 gallons is twenty quarts which converts to 80 cups

Fashion Phreddy buys 5 shirts and 3 ties for 91 on the bargain bus. Billy joe bob buys 8 shirts and 5 ties for 146. If all the shirts sold for the same price and each ties were priced identically. How much was each shirt and tie.

Answers

Assume that the price of the T-shirt is x and the price of the tie is y.

Fashion Phreddy buys 5 shirts and 3 ties for 91. This means that:
5x + 3y = 91 .........> equation I
5x = 91-3y
x = 18.2 - (3/5) y ..........> equation II
Billy joe bob buys 8 shirts and 5 ties for 146. This means that:
8x + 5y = 146 ...........> equation III

Substitute with equation II in equation III:
8(18.2 - (3/5) y) + 5y = 146
145.6 - 4.8y + 5y = 146
0.2y = 0.4
y = 2
Substitute in equation II to get the value of x:
x = 18.2 - (3/5) (2) = 17

Based on the above calculations:
price of T-shirt = x = 17
price of tie = y = 2 

how do you solve p= 6s solve for s

Answers

Answer is s=p/6 (fraction) 

  p=6s
÷6    ÷6        divide 6 by both side
p/6=s

The expression can be written in terms of p after making the subject as s the expression is s = p/6.

What is an expression?

It is defined as the combination of constants and variables with mathematical operators.

It is given that:

The expression is:

p = 6s

To solve the above expression in terms of p make the subject as s

As we know, the arithmetic operation can be defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has a basic four operators that is +, -, ×, and ÷.

Divide by 6 on both sides:

p/6 = 6s/6

p/6 = s

Or

s = p/6

Thus, the expression can be written in terms of p after making the subject as s the expression is s = p/6.

Learn more about the expression here:

brainly.com/question/14083225

#SPJ2

Rosa scored 174,325points playing a video game.to the nearest ten thousand,how many points did Rosa scored?

Answers

170,000 points. Hope this helps!
170000 points should be the answer

how do you solve for missing leg of the Pythagorean theorem

Answers

if you are solving for the hypotenuse, use
a² + b² = c²

if you are solving for a side, use
c² - a² = b²

hypotenuse = c
other sides = a, b


hope this helps

#24 please help I’m very confused on how to do this

Answers

(55 km/h) * (1 mi)/(1.609344 km) ≈ 34.2 mi/h

_____
You can do units conversions pretty easily by multiplying by a conversion factor whose value is 1. That is, since
.. 1 mi = 1.609344 km
dividing by the left side we have
.. (1 mi)/(1.609344 km) = 1
This factor has the convenience that it will cancel km and give mi when multiplied by some number off km. That is what we did above. (The "per hour" just went along for the ride. It did not get involved in the units conversion.)



Which is a true statement about the line x − 4y = 8?




a


The y-intercept of the line is (0, 2).


b


The line passes through the origin.


c


The slope of the line is 1/4


d


The x-intercept of the line is (2, 0).

Answers

the y-intercept of the line is (0, -2), the x-intercept is (8, 0). the slope of the line is in fact 1/4

so your answer is C.

hope this helps, God bless!

For his phone service, jim pays a monthly fee of $11, and he pays an additional $0.04 per minute of use. The least he has been charged in a month is 61.84. What are the possible numbers of minutes he has used his phone in a month?

Answers

Well let's see first 61.84-11 as it is a constant which you then get 50.84. Now take the 50.84 and divide it by .04 per minute. which you should get 1271 minutes.

Answer: 1271 minutes

Add. 4/5 + 3-1/10 Enter the sum in the box as a mixed number in simplest form.

Answers

Simplify the expression.
Exact Form:
37/10

Decimal Form:
3.7

Mixed Number Form:
3 7/13

Answer:

Step-by-step explanation:

ee

Which describes the difference between the two sequences? First Sequence: 1, 6, 36, 216 ... Second Sequence: 3, 6, 9, 12, ...

Answers

The difference between the sequence is that the second sequence counts by 3 and the 1st sequence it doesn’t
sequence one multiplies each number by 6 to get the next number in the sequence while the second sequence adds 3 to each number to get the next in the sequence.

Mrs. Fauskee went to the Farmers Market on Saturday and bought 5 oz of Strawberries, some spinach leaves and 2 3 oz jars of peach jam. The total weight of her purchases came to 20 oz. How many ounces (oz) of Spinach did Mrs. Fauskee buy? *
A 21
B 9
C 8
D 11

Answers

B. It would weigh 9 oz.

Which of the following has the least value?

Answers

it most likely going to be A.

write two verbal expressions for n-5

Answers

A number less than five

OR

n minus five

A triangle has base 15ft and area 60ft2. What is the height?j

Answers

The height is 4 feet. You calculate the area by length times height. So what multiplied by 15 is 60? Well, 15ft x 4ft = 60ft^2

What is the answer to 2/9-2/15

Answers

Hey there!

Common denominator- 45

Multiply 2/9 by 5/5= 10/45 and multiply 2/15 by 6/45
10/45-6/45= 4/45

So, therefore, your answer is 4/45
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