Ling tried to solve an equation step by step.
-2q + 11 = -32
-2q = -43 Step 1
q= 21.5. Step 2
Find Ling's mistake.
Step 1
Step 2
Answer:
No error
Step-by-step explanation:
Ling tried to solve an equation step by step.
Step 1.
-2q + 11 = -32
Step 2.
Subtract 11 from both sides,
-2q + 11 -11 = -32 -11
-2q = -43
Step 3.
Dividing both sides by 2,
q = 21.5
Hence, the calculation has no error.
Answer:
C. Ling did not make a mistake
Step-by-step explanation:
khan
Which of the following is not a solution of the equation x-y=8
Answer:
(2,2)
Step-by-step explanation:
Sidewalk chalk comes in a pack of 24 for $2.59 Bruce takes $20 to the store and purchases as many packs of sidewalk chalk as he can with the money
After purchasing sidewalk chalk how much change your Bruce have assuming no sales tax?
note: type your answers decimal number
Answer:
He has $1.87 change left after purchasing 7 packs of chalk.
Step-by-step explanation:
20/2.59 = 7.722 approx.
So Bruce can purchase 7 packs of chalk at $2.59 each.
Change left
= 20 -7*2.59
= $1.87
Math question please show work due today last day to submit Assignments or I fail please help
Answer:
A. 41
B. 1,590
C. .1
Step-by-step explanation:
A.
the equation is l*w=A
9.2*4.5=A
41.4=A
rounded it would be 41
B.
the equation is pi*r^2=A
3.14*22.5^2=A
3.14*506.25=A
1,589.6=A
^round this up to get 1,590
C.
what I did was use a*b/2 to find one side then add the other side (less complicated in my opinion)
.5*.2/2=A
.1/2=A
.05=A
.05+.05=0.1
Answer:
[tex]\text{a. }41.4\:\mathrm{m^2},\\\text{b. }1590.4\:\mathrm{cm^2},\\\text{c. }0.1\:\mathrm{m^2}[/tex]
Step-by-step explanation:
Part A:
The figure implies a rectangle. The area of a rectangle with base [tex]b[/tex] and height [tex]h[/tex] is given by [tex]A=bh[/tex].
What we're given:
[tex]b[/tex] of 9.2[tex]h[/tex] of 4.5Therefore, the area of the rectangle is [tex]9.2\cdot 4.5=\boxed{41.4\:\mathrm{m^2}}[/tex]
Part B:
The figure shows a circle. The area of a circle with radius [tex]r[/tex] is given by [tex]A=r^2\pi[/tex]. In the figure, the diameter is marked as 45 cm. To find the radius, we must divided this by 2, because by definition, the radius if half the diameter. Therefore, [tex]r=\frac{45}{2}=22.5\:\mathrm{cm}[/tex] and the area of this circle, rounded to the nearest tenth, is [tex]22.5^2\pi=1590.43128088\approx \boxed{1590.4\:\mathrm{cm^2}}[/tex]
Part C:
The figure shows a triangle (polygon with three sides). The area of a triangle with base [tex]b[/tex] and height [tex]h[/tex] is given by [tex]A=\frac{1}{2}bh[/tex].
What we're given:
[tex]b[/tex] of 0.4[tex]h[/tex] of 0.5Substituting given values, we get:
[tex]A=\frac{1}{2}\cdot 0.4\cdot 0.5=\boxed{0.1\:\mathrm{m^2}}[/tex]
2x - 5y = 5
x + y =2
Solve the system of equations
Answer:
[tex]{ \bf{2x - 5y = 5 - - - (a)}} \\ { \bf{x + y = 2 - - - (b)}} \\ (a) - 2(b) : \\ - 7y = 1 \\ y = - \frac{1}{7} \\ x - \frac{1}{7} = 2 \\ x = \frac{15}{7} [/tex]
Answer:
[tex]x = \frac{15}{7} , \ y = - \frac{1}{7}[/tex]
Step-by-step explanation:
2x - 5y = 5 ---------- ( 1 )
x + y = 2 ------------ ( 2 )
x = 2 - y ---------( 3 )
Substitute x in ( 1 ) :
2( 2 - y) - 5y = 5
4 - 2y - 5y = 5
- 7y = 5 - 4
-7 y = 1
[tex]y =- \frac{1}{7}[/tex]
Substitute y in ( 2 ) :
[tex]x + y = 2\\\\x -\frac{1}{7} = 2\\\\x = 2 + \frac{1}{7}\\\\x = \frac{14 + 1}{7}\\\\x = \frac{15}{7}[/tex]
if y is inversely proportional to x and y =5 when x = 2 find the value of y when x = 8
Answer:
y = 10/8 = 1.125 or 1 1/4
Step-by-step explanation:
Inverse proportion means
xy = a constant.
In this case, the constant is given by the example,
x = 2 when y=5, so
xy=10
when x = 8, then
y = 10/8 = 1.125 or 1 1/4
John writes a number sequence starting with 8. Write the next number 8, 22, 36, _______
Answer:
50
Step-by-step explanation:
from the question that we have been given, we have to find out the next number after 36.
John's next number sequence will be 50. Every number after 8 can be gotten by adding 14. So when we add 14 to 36, we get the final answer, which is the next number in the sequence.
This can be seen below:
14 + 8 = 22
14 +22 =36
14 +36 =50
therefore the next sequence would be 50
What is the area of the trapezoid showroelow?
7
25
4.
Answer:
180
Step-by-step explanation:
solve the quadratic equation below for the exact values of x.
4x² - 5 = 75
Answer:
x = ±2√5
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityAlgebra I
Terms/CoefficientsMultiple RootsStep-by-step explanation:
Step 1: Define
Identify
4x² - 5 = 75
Step 2: Solve for x
[Addition Property of Equality] Add 5 on both sides: 4x² = 80[Division Property of Equality] Divide 4 on both sides: x² = 20[Equality Property] Square root both sides: x = ±2√5Answer:
[tex]4x^{2} = 75 - 5[/tex]
[tex]\sqrt{4x^{2}} = \sqrt{70}[/tex]
[tex]4x/4=8.366600265/4[/tex]
[tex]x=2.1 rounded[/tex]
Step-by-step explanation:
marking BRAINLIEST
line with a slope of 2 passes through the point located at (-1,-2) plot two points that line on this line andbhave integer coordinates.
y=2x
(0.5, 1)
(2, 4)
(-2, -4)
is -cos(x) the same as cos(-x)?
Answer:
Not the same
Because if it derives, it will be positive and the other negative
Determine whether the sequence is arithmetic or geometric. Sequence 1: –10, 20, – 40, 80, ... Sequence 2: 15, – 5, – 25, – 45, ... Which of the following statements are true regarding Sequence 1 and Sequence 2.
Answer:
geometric
arithmetic
Step-by-step explanation:
there are no statements to check. you did not copy them in.
but I can solve the first part of the question.
sequence 1 :
-10, 20, -40, 80, -160, 320, -640, ...
I extended the sequence by a few more terms.
but it is clear that each new term is the previous term multiplied by -2.
since the sequence is built by multiplication, it is geometric.
sequence 2:
15, -5, -25, -45, -65, -85, ...
so, it is clear that each new term is the previous term subtracted by -20.
since the sequence is built by adding or subtracting, it is arithmetic.
Please help me w this
Answer: the answer will be 0.5
Step-by-step explanation:
√139/22≈ 0.5
Answer:
0.6
Step-by-step explanation:
=0.591607978~0.6
at a market 8 mangoes and 6 pears cost $25.00 and 4 mangoes and 8 pears cost$30.00. what is the cost of one mangoes
Answer:
the answer is 4.00 Yw for the help
Help me ASAP!
The scale of this map is 1 inch = 50 miles. The ruler measures the distance between Mackinac Bridge and Chicago as 4 inches. How many actual miles are between these two cities?
Answer:
200 actual miles
Step-by-step explanation:
Find the actual distance by multiplying 50 by 4, since there are 50 miles in 1 inch.
50(4)
= 200
So, there are 200 actual miles between the two cities.
Brad wants to buy flowers for his friend
with $33. The daisies are $1 each and
the roses are $2 each. He buys 3 more
daisies than roses.
How much did the roses cost?
PLEASE HELP I NEED THE ANSWER THANK YOU
Answer:
B
Step-by-step explanation:
What is the value of z?
A.35 B.25 C.70 D.140
Answer:A
Step-by-step explanation:
Answer:
D is the correct answer or that question
Colin knows his book is 1 foot long. He uses his book to help him estimate the length of his bike.
I want to help you but ... What's the question?
How many 1/4 mile segments are in a 2 mile relay?
[tex]\frac{2}{1}[/tex] ÷ [tex]\frac{1}{4}[/tex] is the same as [tex]\frac{2}{1}[/tex] × [tex]\frac{4}{1}[/tex]
[tex]\frac{2}{1}[/tex] × [tex]\frac{4}{1}[/tex] = [tex]\frac{8}{1}[/tex]
= 8
I hope this helps! :D
he height after t seconds of an object projected upward with an initial velocity of 48 feet per second from a 210-foot tower can be modeled by h=−16t^2 + 48t +210. The height of a neighboring 50-foot tall building is modeled by the equation h=50. Which statement best describes the validity of these solutions?
A card is drawn from a standard deck. Find the probability of drawing a heart or a 7.
=======================================================
Explanation:
There are A = 13 hearts and B = 4 copies of "7"
The count A+B = 13+4 = 17 may seem like it's the count of hearts or "7" cards, but we're double counting the 7 of hearts. So the true count is actually 17-1 = 16
There are 16 cards we want (either a heart or a "7") out of 52 total. Therefore, the probability is 16/52 = (4*4)/(4*13) = 4/13
Bob can row 5 mph In still water. He rows directly across a river flowing at 6 mph. Using vectors, find his resultant
speed.
a. 7.81 mph
b. 3.32 mph
c. 11.00 mph
d. 7.14 mph
Answer:
7.81mph
Step-by-step explanation:
Using the pythagoras theorem;
resultant r is expressed as;
r² = 5² + 6²
r² = 25 + 36
r² = 61
r =√61
r = 7.81mph
Hence the resultant speed is 7.81mph
HELP 25 POINTS GIVING BRAINLIEST TO WHOEVER GETS IT RIGHT !
Fill in the the table Use the two-way frequency table to complete the two-way relative frequency table which shows the distribution of data with respect to all types of
books. Round your answers to the nearest whole percent
Answer:
Grade 7 -
Fiction: 33%
Non-Fiction: 17%
Total: 50%
Grade 8 -
Fiction: 33%
Non-Fiction: 17%
Total: 50%
Total -
Fiction: 33%
Non-Fiction: 17%
Total: 50%
Conclusions: Everything had the same answer, 33%, 17% , and 50%.
Find the difference: 28y − 16y
A.
12y
B.
10y
C.
-44y
D.
-12y
Answer:
A. [tex]12y[/tex]
Step-by-step explanation:
Subtract like normal 28 - 16 = 12
so then it's 12y
label this graph as “linear” or “non linear”
This answer is Nonlinear
If a bag contains 100 red cubes, 50 blue cubes, 25 yellow cubes and 25 green cubes, what is the probability of Alicia choosing a blue cube?
Answer:
1/4
Step-by-step explanation:
total if 200 cubes. your chance is 50/200 simplify it down
What is it called in cubic inch of a cylinder with a height of 4in and a base radius of 5in to the nearest tenths place?
Answer:
1,256.8in
Step-by-step explanation:
Given data
Height h =4in
Radius r= 5in
The expression for the volume of cylinder is
V=πr²h
Substitute
V=3.142*4²*5
V=3.142 *16*25
V=1,256.8in³
car travels at an average speed of 30 km/h for 2.5 hours.
How far did the car travel in km?
Answer:
75 km
Step-by-step explanation:
distaance = speed * time
d = 30 * 2.5
d = 75
75 km
Two containers designed to hold water are side by side, both in the shape of a
cylinder. Container A has a radius of 12 feet and a height of 15 feet. Container B has a
radius of 8 feet and a height of 17 feet. Container A is full of water and the water is
pumped into Container B until Containter B is completely full.
To the nearest tenth, what is the percent of Container A that is full after the pumping
is complete?
play
play
A
Container B
Answer:
49.6% of container A is still full
Step-by-step explanation:
volume of a cylinder : pi×r²×h
Va = pi × 12² × 15 = pi×144×15 = 6785.84013... ft³
Vb = pi × 8² × 17 = pi×64×17 = 3418.05281... ft³
how much of A is still filled, when B has been completely filled ?
Va left = Va - Vb = 3367.78732... ft³
100% of Va = 6785.84013... ft³
1% of Va = 67.8584013... ft³
so, how often does 1% of Va fit into the remaining filing volume of A (Va left) ?
3367.78732... / 67.8584013... = 49.6(2962963...)%
