Answers
Related Questions
-3x = 12
i really need to know this for my math exam
Answers
Answer:
x = -4
Step-by-step explanation:
[tex] - 3x = 12[/tex]
Lets divide both the sides by -3.
[tex] = > \frac{ - 3x}{ - 3} = \frac{12}{ - 3} [/tex]
[tex] = > x = - 4[/tex]
x= -4
-3x=12
divide x by -3 and do the same on the other side
12÷(-3)= -4
hence, x= -4
if you want to check if something is right, substitute your answer into the question
hope this helped
pencils sells for $5.00. What is the sales tax rate if the total cost of the pencils is $5.40?
Answers
Answer:
8%
Step-by-step explanation:
5 increase 8% =
5 × (1 + 8%) = 5 × (1 + 0.08) = 5.4
VERY EASY ITS YES OR NO QUESTION WILLL GIVE BRAINLIEST
Is it possible for a system of equations composed of a linear function and a quadratic function to have 2 solutions?
Answers
Answer:
yes!
Step-by-step explanation:
Expand.If necessary, combine like terms (2x-3)(2x-3)
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The expression (2x-3)(2x-3) can be written as (2x-3)² or 4x² - 12x + 9 after expanding by using the identity (a - b)² = a² -2ab + b²
What is an expression?It is defined as the combination of constants and variables with mathematical operators.
We have given an expression:
= (2x-3)(2x-3)
After multiplication:
= (2x-3)²
We can also expand the above expression by using the identity:
(a - b)² = a² -2ab + b²
= 4x² - 12x + 9
Thus, the expression (2x-3)(2x-3) can be written as (2x-3)² or 4x² - 12x + 9 after expanding by using the identity (a - b)² = a² -2ab + b²
Learn more about the expression here:
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What is y = mx + b mean for functions
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Answer:
Slope-Intercept Form. A function whose graph is a line or a part of a line is called a linear function. In general, a linear function is a function that can be represented by an equation in the form y = mx + b. The form y = mx + b, or f(x) = mx + b, is called the slope-intercept form of a linear equation
Step-by-step explanation:
hope this help:))
What variable do you eliminate?
4x + 8y = 20
-4x + 2y = -30
x because they have opposite signs
O
O
y because they don't have opposite signs
x but you have to multiply the top equation by 2, and the bottom equation by -2
O y but you
y but you have to multiply the bottom equation by 4
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Hope this helps :3
find the measure of a regular 45 agon
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Answer:
172 degrees
Step-by-step explanation:
explanatory: yes the person correct
find the missing angle
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Answer:
The missing angle is 109°
sarah says the two expressions 3(2+x) and 6+3x are equivalent is she right ?
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Answer:
Yes
Step-by-step explanation:
She just distributed the 3 to the (2+x). If you multiple each by 3, you'll get 6+3x.
Answer:
Yes
Step-by-step explanation:
3 and 6 are multiples so yes they are equivalent
A shelf measures 720 mm long.
a) How many centimetres long is the shelf?
b) How many metres long is the shelf?
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b) 0.72 m
10mm = 1cm
100cm = 1m
a) The length of shelf in centimeters is 72 cm
b) The length of shelf in metres is 0.72 m.
What is Unit Conversion?The same attribute is expressed using a unit conversion, but in a different unit of measurement. For instance, time can be expressed in minutes rather than hours, and distance can be expressed in kilometres, feet, or any other measurement unit instead of miles.
Given:
A shelf measures 720 mm long.
a) As 1 cm = 10 mm
So, the length of shelf in centimeters
= 720 /10
= 72 cm
b) As 1 m = 1000 mm
So, the length of shelf in meters
= 720 /1000
= 0.72 m
Learn more about Unit Conversion here:
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Bacteria A has a growth rate of 0.68% per minute. Bacteria B has a growth rate of 0.012% per second. Determine which bacterium has a faster growth rate. Explain.
can someone help me with this
Answers
Answer:
bacteria A
Step-by-step explanation:it is growing at a faster rate
Answer: Bacteria A
Step-by-step explanation:
becasue the growth rate of bacteria a is growing faster than b
Joe works part time at a store where he earns $645.60 each month, what expression can be used to find the amount Joe earns working any number of mouths (months stand for m)
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Answer:
645.60m
Step-by-step explanation:The m will stand for months and it is a variable meaning you can replace it with the number of months and then just multiply it
X is the total amount he earns
M is how many months he works
Ex: X=645(4)
=2580
I need some help with this problem
Answers
Answer:
B
Step-by-step explanation:
15x + 3x + 19 = -17
18x + 19 = -17
18x = -36
x = -2
A prize is divided in the ratio 2:5
If the smaller share is £50 what is
the larger share?
Answers
Answer:
125
Step-by-step explanation:
2:5
50: ?
50 divided by 2 = 25
25 times 5 is = ?
50:125
di sure kung tama ^^
You run 1/12 mile in 1/2 minute. How many miles per hour do you run?
Answers
Answer:
10
Step-by-step explanation:
1/12 times 2 would be 1/6 miles per minute, so times that by 6 and it takes 6 minutes to run 1 mile. 60 minutes divided by 6 equals 10 miles per hour. Sorry if thats confusing
answer quick please !!
Answers
Answer:
8
Step-by-step explanation:
Answer:
36 units²
Step-by-step explanation:
I used the triangles' area to find the area of the quadrilateral. The area of a triangle is 1/2 x base x height. The top triangle is 1/2 x 5 x 10 or 25. The bottom triangle is 1/2 x 2 x 11 or 11. Add 25 + 11 to get the total area.
Hope it helps!
Each square below represents one whole.
What percent is represented by the shaded area?
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Answer:
33.333% repeating, the 3 after the decimal repeats
What number is equivalent to 7/15
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Answer:
0.5385
-or-
7/13, 14/26, 21/39, 28/52, 35/65, 42/78, 49/91, 56/104, 63/117, 70/130, 77/143, 84/156
Answer:
14/30
Step-by-step explanation:
You just have to multiply the denominator (bottom number) and the numerator (top number) by the same number or dived both numbers.
I just need someone to help me with the third one I already did the other two, I will give brainliest
Answers
Answer:
the solution to the equation is 5
Answer:
n = 5
Step-by-step explanation:
We can substitute n for 5 in the equation to check and see if it is true.
2(5) - 3 = 7
10 - 3 = 7
hope this helps :)
Carmine pain an electrician x dollars per hour for a 5 hour job plus 70 for parts. The total charge was 320 which equation can be used to determine how much do electrician charge per hour
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Answer:
5x + 70 = 320
Step-by-step explanation:
We know that Carmine paid an electrician a certain amount per hour, we also know that they worked for 5 hours. Therefore we have 5x.
He also got paid 70 for parts, meaning an extra $70
And we know that we have the total charge and that the main point of this question is to determine how much the electrician was paid per hour.
Therefore :
5x + 70 = 320
What is the areas of triangle
Answers
135 is the answer hope this helps
Which problem solving strategy would be best to solve this problem?
Brandon went to the store and spent $2.50 on pencils. He spend half of what he had left on a notebook and paper. When he got home he had $5.00 left. How much money did Brandon have before going to the store?
A) make a table, chart or list
B) work backwards
C) use a formula
D) look for a pattern
Answers
Answer:
B) work backwards.
Step-by-step explanation:
Since they are asking for how much money he had at first and they displayed how much he spent without telling the amount of money at the start of the question, this is definitely a backwards question. For working backwards, you will need to do workings the opposite as what they said in the question.
Solve the equation. -8z+ 8 + 6z = -3z+ 13
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Answer:
im sorry i need points
Step-by-step explanation:
Answer: z=5
Step-by-step explanation:
(Multiple choice/ Brainliest will be rewarded)
I’d like some help on this question.
(Zoom in if needed)
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The triangles are similar.
What is the value of x?
Enter your answer in the box.
Answers
Answer: 16 units
Step-by-step explanation:
In similar triangles, the sides keep the same ratio, in this case 3:4:5.
Thus, because 12 is 3*4 and 20 is 5*4, x must be 4*4, or 16.
Hope it helps <3 :D
Determine when domain increases
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Answer:
Step-by-step explanation:
[0,7)
because the dot is colored in you need to have the bracket
if Nandi and thabo share R15,00 in the ratio 1:2 how many rands does each get
Answers
Answer:
[tex]\boxed{\textsf{ The amount shared by Nandi is \textbf{ Rs 500. }.}}[/tex]
[tex]\boxed{\textsf{ The amount shared by Thabo is \textbf{ Rs 1,000. }.}}[/tex]
Step-by-step explanation:
Given that Nandini and Thabo share Rs 1500 in the ratio 1:2 . And we need to find how much each gets . So lets take the given ratio be 1x :2x . Now here we can find the share of both as ,
[tex]\qquad\boxed{\boxed{\sf Share =\dfrac{ Ratio \ number }{Sum \ of\ ratio\ nos. }\times Amount }}[/tex]
Hence here the sum of ratio numbers would be 1+2 = 3 . Here the ratio number of Nandi is 1 and that of Thaboo is 2 . So ,
Share of Nandi :-
[tex]\sf\implies Share =\dfrac{ Ratio \ number }{Sum\ of\ ratio\ nos. }\times Amount \\\\\sf\implies Share_{(Nandi)}= \dfrac{1}{1+2}\times Rs\ 1,500 \\\\\sf\implies Share_{(Nandi)}= \dfrac{1}{3}\times Rs\ 1,500 \\\\\sf\implies \boxed{\pink{\frak{ Share_{(Nandi)}= Rs\ 500 }}}[/tex]
[tex]\rule{200}2[/tex]
Share of Thabo :-
[tex]\sf\implies Share =\dfrac{ Ratio \ number }{Sum\ of\ ratio\ nos. }\times Amount \\\\\sf\implies Share_{(Thabo)}= \dfrac{2}{1+2}\times Rs\ 1,500 \\\\\sf\implies Share_{(Thabo)}= \dfrac{2}{3}\times Rs\ 1,500 \\\\\sf\implies \boxed{\pink{\frak{ Share_{(Thabo)}= Rs\ 1,000 }}}[/tex]
please help and show work
Answers
Step-by-step explanation:
sides opposite to equal angles are equal in length :
angle45 = angle 45
r = s
by Pythagoras theorem :
r² + s² = (9√2 )²
s²+s²= 9 × 9 × 2
2s²= 9× 9×2
s²= 9 × 9
s= √9× 9
s = 9
r= s = 9 units .
plz mark my answer as brainlist plzzzz hope this will be helpful to you.
Simplify the expression.
(5-1) + (-5-i)
Answers
Answer:
4+(-5-i)
Step-by-step explanation:
what is "i"?
Owen follows the rule divide by 2 to write the patteren below. He will write two more numbers to complete the pattern. which statement is true
800,400,200,100
A Every number in the pattern will have a 0 in its 10 place
B Every number in the patteren will have a 0 in its ones place
C Every number in the pattern will have a 0 or a 5 in its tens place
D Every number in the pattern will have a 0 or a 5 in its ones place
Answers
Answer:
None of these sound correct but I would say D
Step-by-step explanation: