Answer:
The number will be -13
Step-by-step explanation:
Let the no. be x
Its twice will be = 2x
According to the question ,
[tex]2x + 7 = -19\\=> 2x = -19 - 7 = -26\\=> x = \frac{- 26}{2} = - 13[/tex]
An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
The value of the number is -13.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
The sum of twice a number and 7 is -19.
Let the number be M.
Now,
2M + 7 = -19
We will solve for M.
2M + 7 = -19
Subtract 7 on both sides.
2M + 7 - 7 = - 19 - 7
2M = -19 - 7
2M = -26
Divide both sides by 2.
M = -26/2
M = -13
We can cross-check.
2M + 7 = -19
2 (-13) + 7 = -19
-26 + 7 = -19
-19 = -19
Proved
Thus.,
The value of the number is -13.
Learn more about expressions here:
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Martin has 5/6 of a pizza . Liam has 4 times as much pizza as Martin. How much pizza does Liam has?
Answer:
10/3 pizzaStep-by-step explanation:
step one:
This problem is focused on ratios and fractions
from the problem statement, Martin has 5/6 pizza
Liam has 4 times more of what Martin have
step two:
so we can express what Liam has as
=(5/6)*4 = 20/6or
=5/6+5/6+5/6+5/6= 20/6
= 20/6
step three:
we can reduce both numerator and denominator
= 10/3
Hence Liam has 10/3 pizza
Quantity of pizza that Liam has is;
3 full pizzas and a third of a pizza.
Martin has 5/6 of a pizza.
Thus;
Quantity of pizza that Martin has = 5/6
Now we are told that Liam has 4 times as much as Liam, then;
Quantity of pizza Liam has = 4(5/6) = 10/3
This translates to 3⅓ pizza
Thus, in conclusion, Liam has 3 full pizzas and a third of a pizza.
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Answer if you want it’s ez I just don’t get it
Answer:
50inStep-by-step explanation:
Look at the picture.
We move both short sides to form a rectangle.
The formula of a perimeter of a rectangle:
P = 2(l + w)
l - length
w - width
We have l = 15in and w = 10in.
Substitute:
P = 2(15in + 10in) = 2(25in) = 50in
Describe how to graph the points (3, -2) and (-1, -7).
Answer:
Place the dots on the x and y axis.
Step-by-step explanation:
(x, y)
Place the x axis dot on the lines that go left to right.
Place the y axis dot on the lines that go up and down.
I hope this helped! ^^
What must be added to the expression x^2 - 18x to make it a perfect square?
Answer:
+ 81
Step-by-step explanation:
Given
x² - 18x
To complete the square
add ( half the coefficient of the x- term )² to x² - 18x
x² + 2(- 9)x + (- 9)²
= x² - 18x + 81
= (x - 9)² ← perfect square
write the degree of polynomials how do you find the degree?
Answer:
5 or 3 will be the answer
The definition of a degree is the highest exponent of a term with a non-zero coefficient.
What is the exponent for the term [tex]8x^2[/tex]? 2
What is the exponent for the term [tex]13y^3[/tex]? 3
Since 3 is greater than 2, the degree of the polynomial is 3.
Hope this helps.
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From the top of a tree 20 metres high,the angle of depression at a point on the opposite bank of a river is found to be 30° .Find the breadth of the river.
Answer:
17.3
Step-by-step explanation:
sin(30)=0.5
0.5*20=100
20*20+x*x=100
x=17.3
There are 67 electricians on a jobsite. Thirty-one (31) are "career" helpers. Twenty-four (24) are indentured apprentices. Nine (9) are journeymen. Three (3) are foremen. What percentage of the electricians are indentured apprentices?
Answer:
35.82 %
Step-by-step explanation:
Total no of electrician job = 67
No. of indentured apprentices = 24
____________________________________
Percentage mean per hundred,
Example for x percentage of any thing
literally it means if there are total no. of 100 things, then x is the number of thing in consideration.
Formula for percentage calculation = (number of a particular thing/ total no of things out of which the particular thing is considered) *100
______________________________________
Here,
Total no of electrician job = 67
No. of indentured apprentices = 24
percentage of indentured apprentices = (Total no of electrician job /No. of indentured apprentices) * 100 = 24/67 *100 = 35.82 %
Thus, there 35.82 % indentured apprentices out of total electricians.
It means that if there were 100 electricians, then there would have been 35.82 indentured apprentices out of those 100 electricians.
A city park is opening a new swimming pool. You can pay a daily entrance fee of $3 or purchase a membership for the 12 week summer season for $82 dollars and pay only $1 per day to swim. How many days would you have to swim to make the membership worthwhile?
Answer:
41 days
Step-by-step explanation:
The membership would be worthwile if you swim an amount of days paying the daily entrance fee that would make your total cost equal to the cost of the membership. From that you can write the following expression:
3x=82+(1*x), x is the number of days you go to swim
Now, you can solve for x:
3x=82+x
3x-x=82
2x=82
x=82/2
x=41
According to this, the answer is that you would have to swim 41 days to make the membership worthwile.
A bakery sold 39 mocha cupcakes in a day, which was 65% of the total number of cupcakes sold that day. How many total cupcakes did the bakery sell that day?
Domain:
Range:
State the domain and range for the graph
domain:
x <= 3
range:
x ∈ (-∞, ∞)
if the sum of two angles is 180°,then each is the___of the other
Step-by-step explanation:
"If the sum of 2 angles is 180°, then each is the supplementary angle of the other".
answer with the appropiate symbol (<,>,=)
Answer:
(= )This is the appropriate symbol.
Step-by-step explanation:
-|2|=(-2)
Point a is at (-1,-9) and point m is at (0.5,-2.5) point m is the midpoint of a and point b what coordinates of point b
Answer:
B (2, 4)
Step-by-step explanation:
A (-1,-9); M (0.5, -2.5); B (xB, yB)
M is the midpoint of AB, therefore we have these 2 equations:
(*) xA + xB = 2. xM
(**) yA + yB = 2. yM
(*) <=> xB = 2. xM - xA = 2x0.5 - (-1) = 1 + 1 = 2
(**) <=> yB = 2. yM - yA = 2x(-2.5) - (-9) = -5 + 9 = 4
So, B (2, 4)
Help me Please . . . . . . . . .
Answer:
[tex]1 \frac{1}{5}[/tex]
Step-by-step explanation:
[tex]6\div 5 = 1 \:remainder 1\\\\= 1\frac{1}{5}[/tex]
What value of x makes this equation true? 2x + 3 = 9
Answer:
the is x would equal to 3
Answer:
[tex]\boxed {\tt x=3}[/tex]
Step-by-step explanation:
We want to solve for x, therefore we must isolate the variable.
We are given the equation:
[tex]2x+3=9[/tex]
3 is being added to 2x. The inverse of addition is subtraction. Subtract 3 from both sides of the equation.
[tex]2x+3-3=9-3[/tex]
[tex]2x=9-3[/tex]
[tex]2x=6[/tex]
x is being multiplied by 2. The inverse of multiplication is division. Divide both sides of the equation by 2.
[tex]\frac{2x}{2} =\frac{6}{2}[/tex]
[tex]x=\frac{6}{2}[/tex]
[tex]x=3[/tex]
Let's check our solution. Plug 3 in for x and solve.
[tex]2x+3=9[/tex]
[tex]2(3)+3=9[/tex]
[tex]6+3=9[/tex]
[tex]9=9[/tex]
This checks out, so we know our solution is correct.
The solution to the equation 2x+3=9 is x=3
A store has 2 employees that earn 159 dollars altogether. If they all earn the same amount, how much does each employee earn?
Rewrite y = 4(3x - 2) In the form y = mx +b.
Answer:
y = 12x - 8
Step-by-step explanation:
m = 12
b = -8
just divide inside the bracket
a survey of 100 students showed that 45 students take english, 25 take math,
I need help on 1-8 ..
Answer:
To begin this problem we call "the sum of the number" x. Now we have the equation 2(x)+5=20. This is the answer because it said to translate the equation. I think 2x+5+20 would be the correct translation.
Chloe spent $69 and now has no money left. She had before her purchase. She had $ before her purchase. can you please help me with this please
Answer:
$69
Step-by-step explanation:
Given
[tex]Purchase = \$69[/tex]
[tex]Amount\ Left = \$0[/tex]
Required
Determine the cash before purchase
To get the her amount before the purchase, we simply add both given parameters together.
This is done as follows;
[tex]Amount = Amount Left + Purchase[/tex]
Substitute 0 for Amount Left and 60 for Purchase
[tex]Amount = \$0 + \$69[/tex]
[tex]Amount = \$69[/tex]
Hence, she had $69 before the purchase
Can someone please help me find the length and width please? 10 POINTS
Answer:
4.4 m
Step-by-step explanation:
The scale shows you the width of the bedroom is ...
1.2 + 2.1 + 1.1 = 4.4 . . . meters
simplify the fraction 56/100
If m 2 1 = 4x - 16 and m _4 = 2x + 10, compute m 2 4.
14+ х = 3х2
What is the answer?
Answer:
It is -8
Step-by-step explanation:
i know this because what is 14-6 which equally 8 so i just put a negative sighn in front so it is -8
First answer gets brainliest!!!!! Please help
Answer: first answer
:))))))))))))))))))
Where my brainlist
Answer:
its the 3rd answer xD this took awhile to figure out
Step-by-step explanation:
Which of the following represents a function that is reflected over the x-axis and shifted up 3
units from the parent graph? *
(1 Point)
o f(x) = -√² – 3
Of(x) = -x2 + 3
O f(x) = x2 + 3
O f (x) = x2 - 3
Answer:
Option 2.
Step-by-step explanation:
f(x) = - x^2 + 3
The parent function is x^2
- the '-' before the x^2 reflects it in the x-axis, and the + 3 shifts it up 3 units.
Plz help!!! It is 2.389 x 10 miles to the moon from the Earth. How many miles will it be if you go to the moon and
back two times? Write your answer in scientific not
Answer:
47.78
Step-by-step explanation: 2.389 times 10 = 23.89 x 2 = 47.78
Solve for a.
q+a= b
Solve for x
ax + b = c
solve for r.
(r + y)/q = m
Solve for x
4 (x – 7) = -8
Answer:x=4
Step-by-step explana
translate the expression “the quotient of a number and (-2)”
Answer:
The quotient of a number and 2 is the same as the difference of the number doubled and 3.
Step-by-step explanation:
Let the number be x.
The quotient of x and 2 will be x/2. The difference of the double of x and 3 and 2x-3.
As the above two quantities are equal,...
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