Answer:
x = - 6, x² = [tex]\frac{7}{2}[/tex]
Step-by-step explanation:
[tex]2x^{2}[/tex] + 12x - 7x - 42 = 0
2x^{2} (x + 6) - 7 (x + 6) = 0
(x + 6) x (2x - 7) = 0
x + 6 = 0
2x - 7 = 0
x = - 6
x = [tex]\frac{7}{2}[/tex]
x = - 6, x² = [tex]\frac{7}{2}[/tex]
3 people can deliver 1000 letters in 30 minutes.
How long would it take 1 person to deliver all 1000 letters?
If there are 5 people delivering would it take more or less time?
How long will take 5 people to deliver 1000 letters?
Answer: It would take 1 hour and 30 minutes for one people do it.
If 5 people do it would take less time. If there are 5 people delivering the letters it would take them 12 minutes ti deliver all 1,000 letters.
identify the diameter of Q given that a= 169 pie in2
Answer:
the diameter will be D=26 in.
Step-by-step explanation:
The area of a circle is given by:
[tex]A=\pi R^{2}[/tex] (1)
Where:
A is the areaR is the radius of the circleNow, we know that A = 169 π in²
So, we just need to use equation 1 to find R.
[tex]169\pi = \pi R^{2}[/tex]
[tex]R=\sqrt{169}[/tex]
[tex]R=13 \: in[/tex]
Therefore, the diameter will be D=2*R=26 in.
I hope it helps you!
The diameter of the circle is 26 inches
The area of the circle is given as:
[tex]A = 169\pi[/tex]
The area of a circle is calculated as:
[tex]A = \pi r^2[/tex]
By comparison, we have:
[tex]\pi r^2 = 169\pi[/tex]
Divide both sides of the equation by pi
[tex]r^2 = 169[/tex]
Take the positive square roots of both sides
[tex]r = 13[/tex]
Multiply by 2, to calculate the diameter
[tex]d =2 * 13[/tex]
[tex]d = 26[/tex]
Hence, the diameter of the circle is 26 inches
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Evaluate (6.1 x 10-3) (8 x 109). Write your answer in scientific notation and standard form.
Scientific Notation:
Standard Form:
Answer:
Scientific Notation: 4.88 ×10^7
Standard Form: 4.88 ×10^7
Step-by-step explanation:
6.1×10^(-3) = 0.0061
8×10^9 = 8000000000
0.0061×8000000000 = 48800000
[tex] = 4.88 \times {10}^{7} [/tex]
find the volume of a rectangular block of ice 2 feet by 3 and 1/2 feet by 1 and 1/2 feet the volume of the rectangular block of ice is what simplify your answer please
Answer:
V = 10 1/2 ft³
Step-by-step explanation:
V = length • width • height
V = 2 • 3 1/2 • 1 1/2
V = 10 1/2 ft³
Drag the tiles to the correct boxes to complete the pairs.
Match each radius or diameter of a circle with its approximate circumference.
Tiles
Answer:
36
3
5
12
Step-by-step explanation:
The circumfrence of a circle is as follows
2πr
For this question π=3.14
So we have
113.04=2πr
solve for r
r= 18
which means that diameter is 36
Just do the same thing with the other questions
18.84=2πr
r=3
31.4=2πr
r=5
37.68=2πr
r=6 which means that the diamater is 12
HELP AND WILL GIVE BRAINLIEST!!! Solve for x
Answer:
22
Step-by-step explanation:
yevdywjebecgeh3bebebv3hruejjd÷×+jfur
50/20 equals 20 over X
Answer:
50/x
Step-by-step explanation:
Answer:
8
Step-by-step explanation:
cross multiply:
50*x = 20*20
50x=400
divide by x (50)
50x/50 = 400/50
x=8
a line has a y-intercept of 0 and a slope of 7/11 what is the equation in slope-intercept form
Answer:
y = 7/11x
Step-by-step explanation:
What’s the answer for 24=3(n-5
Answer:
n=13
Step-by-step explanation:
isolate the variable by dividing each sides by factors that don't contain variables.
Clara and Ben each have a rock collection. • The number of rocks in Clara's collection can be represented by, • The number of rocks in Ben's collection is 4 times the number of rocks in Clara's collection. • The total number of rocks in both collections is 225. What is x, the number of rocks in Clara's collection?
Answer:
ASD
Step-by-step explanation:
Someone help with this please
anton needs to buy 3.5 meters of cloth for their project in TLE. If 1 meter of cloth costs P35.00 how much will he spend for 3.5 meters of cloth?
Answer:
122.5
Step-by-step explanation:
Combine the like terms to create an equivalent expression:
-4p+(-6p)
Answer:
-10p
Step-by-step explanation:
-4 - 6 = -10
-10
Step-by-step explanation:
combine like terms to create an equivalent
Write an equation in slope intercept form for: m = - 1 and b = 2
Answer:
y=-1x+2
or
y=-x+2
y=mx+b
substitute
you get y=-1x+2
A circle has a radius of 4in. What is the area of the circle?
Answer:
the area is 50.27
Step-by-step explanation:
Use the formula and you can get the answer A=πr2
Answer: 50.27
Step-by-step explanation:
A colony of bacteria starts out with 175 cells and they double every hour write an equation that models the number of cells y after x hours
Answer:
200
Step-by-step explanation:
what is x if 10/10+x = 35/56
x=?
Answer:
x = [tex]-\frac{3}{8}[/tex]
Step-by-step explanation:
Answer:
your answer is -3/8 or in decimal form its -0.375
Step-by-step explanation:
Which equation is equivalent to StartRoot x squared + 81 EndRoot = x + 10? x + 9 = x + 10 x + 9 = x2 + 20x + 100 x2 + 81 = x2 + 100 x2 + 81 = x2 + 20x + 100
Answer:
D on edge
Step-by-step explanation:
I got several quiz checks
Answer:
D) x2 + 81 = x2 + 20x + 100
Step-by-step explanation:
Which equation is being graphed here?
A. y-4= -2/3(x-2)
B. y-4= -2/3(x+2)
C. y+4= -3/2(x-2)
D. y+4= -3/2(x+2
______________________________
1.) Graph each equation:
(I've included the graphs below.)
So your answer is c, [tex]\bold{y+4=-\frac{3}{2}(x-2)}[/tex].
______________________________
Yesterday, a parking lot had 60 cars parked in it. Of the cars parked in the parking lot, 40% were silver, 14 were red, and the rest were blue. How many of the cars were blue?
A. 24 cars
B. 38 cars
C. 22 cars
D. 6 cars
Answer:
C. 22 Cars are Blue
Answer:
22
Step-by-step explanation:
no:of silver cars=60*40/100 ie 24
no:of red cars ie 14
total cars=silver+red+blue
60=24+14+blue
60=38+blue
blue cars=60-38
ie 22
please help!! i'll give you brainliest, 5 stars, and a thanks
Answer:
2.25 I think
Step-by-step explanation:
Answer:
to find the answer out you need to find out 2/3 of $4.50 and to do that divide it by three. once you have figured that out multiply it by 2 and you will get your answer
Step-by-step explanation:
see above
what is 3,100,000,000 times 7
Answer:
21700000000
Hope this helps.
21700000000
Good luck!
Divide. Enter the quotient in simplest form.
9/10 divided by 3/8
g(x) = (x +9)(x + 8)
1) What are the zeros of the function?
Write the smaller x first, and the larger x second.
smaller x =
larger x =
2) What is the vertex of the parabola?
Answer:
Step-by-step explanation:
smaller x = -9
larger x = -8
vertex =
(-17/2, -1/4)
10. A jar contains dimes and quarters. There are 15 more quarters than dimes. The coins total $23. How many
of each coin is in the jar?
What is this question asking you?
Dimes
Quarters
Number of Dimes:
Number of Quarters:
Answer:
dimes:$8 quarters:$15
Step-by-step explanation:
im still in 6th grade
Answer:
55 dimes and 70 quarters
Step-by-step explanation:
Using a simple strategy of guess and check we know that the quarters will always be 15 more than dimes. From this we know it has to be around the 50s as 40s would bring us numbers too low and 60s too high. 55 happens to be answer for dimes as that brings in $5.50. 23-5.5=17.5 multiply that by 4 as each quarter is only valued at $0.25 you get the answer 70 which just so happens to meet the requirements of being 15 more than 55.
The ratio of boys to girls in Ella's class is 3 to 4. The ratio of boys to girls in Minh's class is 4 to 5. Each class has a total of 20 girls. How many boys are in each class? *
Answer:
15 and 16
Step-by-step explanation:
i hop it helps
There are 15 boys in Ella's class and 16 boys in Minh's class.
What are ratio and proportion?A ratio is a comparison between two similar quantities in simplest form.
Proportions are of two types one is the direct proportion in which if one quantity is increased by a constant k the other quantity will also be increased by the same constant k and vice versa.
In the case of inverse proportion if one quantity is increased by a constant k the quantity will decrease by the same constant k and vice versa.
Given, The ratio of boys to girls in Ella's class is 3 to 4. The ratio of boys to girls in Minh's class is 4 to 5.
Each class has a total of 20 girls and assuming each class has a total of x students.
∴ 4x/7 = 20.
4x = 140.
x = 35.
No. of boys = 15.
5x/9 = 20.
5x = 180.
x = 36.
No. of boys = 16.
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Decide whether each of the following pairs of expressions are equivalent for all values of x. If they are equivalent, show how you can be sure. If they are not, justify your reasoning completely.
a. (x - 5)(2x + 7) and 2x^2 - 3x - 35
b. 3(x - 2)^2 + 6 and 3x² + 18
What is 9/2 × 20/3 × 9/4?
Answer:
67.5
Step-by-step explanation:
4.5 times 6.66 times 2.25 will be 67.5
I need help with this
Determine the amount that should go in the blank in the sentence below.Explain
why.
Jamie needs to sell more thanelectronic devices each month.
th.
In the box below, type the sentence above with the correct number in the blank
AND explain why it must be more than that number
Plz hurry
Answer: 27444444444444444
Step-by-step
click here