Answer:
[tex] \sf \hookrightarrow \: {2x}^{2} + 3x + k = 0 \\ \sf \hookrightarrow \: 2 {(2)}^{2} + 3(2) + k = 0 \\ \sf \hookrightarrow \: 2 \times 4 + 6 + k = 0 \\ \sf \hookrightarrow \: 8 + 6 + k = 0 \\ \sf \hookrightarrow \: 14 + k = 0 \\ \sf \hookrightarrow \: k = - 14[/tex]
Answer:
Step-by-step explanation:
1) substitute x with 2
2*2^2 + 3*2 + k = 0
2) solve the equation
8 + 6 + k = 0
k + 14 = 0
k = -14
hello please help i’ll give brainliest
Answer:
second option
Step-by-step explanation:
Cans someone pls give me the answer to this?
Answer:the value drops 100$ every 3 years
Step-by-step explanation:
moves down 100 every three years
PLEASE HELP!!!!!!!!!!!!!!!!!
9514 1404 393
Answer:
the sum of the interior angles is not 360°
Step-by-step explanation:
In order for the tiles to fit as shown, the sum of their interior angles must be 360°. Each n-sided figure has an interior angle sum of ...
180° - 360°/n
Then the sum of interior angles of 5-, 6-, and 8-sided figures will be ...
(180° -360°/5) +(180° -360°/6) +(180° -360°/8) = 540° -360°(1/5 +1/6 +1/8)
= 540° -360°(59/120) = 363° ≠ 360°
The angle sum is incorrect, so the tiles will overlap or leave a gap. They will not fit together perfectly.
Evaluate the expression below when n = 3.2. If needed, answer as a fraction or a decimal.
12n−8
Answer:
30.4
Step-by-step explanation:
12(3.2)-8
38.4-8
30.4
An iron ball has a density of 4 g/cm3.
The volume of the ball is 15 cm3.
What is the mass of the ball?
========================================================
Explanation:
m = mass
v = volume
d = density
The formula we use is
d = m/v
Multiplying both sides by v allows us to solve for m
d = m/v
d*v = m
m = d*v
Now plug in the given density (d = 4) and the given volume (v = 15) and simplify:
m = d*v
m = 4*15
m = 60 grams
Note how,
d = m/v
d = 60/15
d = 4
which helps confirm our answer
three desks and a bookcase together weigh 157 lb. The bookcase 34 lb. How much does each desk way. Write and solve an equation.
Answer:
Step-by-step explanation:
Let "d" represent desks:
157 = 3d + 34
You would then subtract 34 from 157:
123 = 3d
You would then divide 123 by 3, since you are now finding the weight of 3 desks:
123
----- = d
3
Therefore, d = 41 lb.
The frigate bird has a top recorded speed of 153 kilometers per hour. How would you state this speed in the appropriate customary unit? (1 km = 0.62 mi)
Answer:
94.86 miles per hour
Step-by-step explanation:
The frigate bird has a top recorded speed of 153 kilometers per hour. How would you state this speed in the appropriate customary unit? (1 km = 0.62 mi)
The appropriate customary unit is calculated as:
1 km = 0.62 miles
153 km = x
Cross Multiply
x = 153 × 0.62 miles
94.86 miles
Therefore, the appropriate customary unit is 94.86 miles per hour
please help... On a market day , Aunt Mansah bought 100 oranges at 4 for 20p. On reaching home, she gave some to her husband and then sold the remaining at 5 for 40p. If she made a profit of £2.60, find the number of oranges given to her husband
Answer:
250
Step-by-step explanation:
she gave 5 oranges to her husband .
What is an Equation ?A statement that links two expressions with an equal sign is called an Equation.
It is given that
Aunt Mansah bought 100 oranges
she bought 4 oranges for 20p
1 is bought at 5p
Let x be the number of oranges she gave to her husband
The remaining oranges were sold at 5 for 40p
1 is sold at 8p
Profit = £2.60
The given data can be used to form equation and solving them will give desired answers
1 pound = 100 pence
( 100 - x) * 8 - ( 100) * 5 = 2.60 * 100
800 - 8x -500 = 260
-8x +300 = 260
8x = 40
x = 5
Therefore she gave 5 oranges to her husband .
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Graph each equation using a table. 5x + 4y = 20
Answer:
Brainliest Please!!
Step-by-step explanation:
ok ik but i need help with this i think i got it tho -275=2x -50
Answer:
-112.5
Step-by-step explanation:
2x - 50 = -275
2x = -225
x = - 112.5
Answer:
x = -225/2 (or) -112.5
Step-by-step explanation:
Now we have to,
→ Find the required value of x.
The equation is,
→ -275 = 2x - 50
Then the value of x will be,
→ -275 = 2x - 50
→ 2x - 50 = -275
→ 2x = -275 + 50
→ 2x = -225
→ x = -225/2
→ [ x = -112.5 ]
Hence, value of x is -112.5.
Someone Please Help
Evaluate the function for the given value of x.
y = 3; x= 2.
Answer:
Hello! answer: 9
Step-by-step explanation:
3 × 3 = 9
3² = 9
Answer:
Evaluate the function for the given value of x
y=3; x=2
3x3 = 9
also, explain why and how you got it right and the one that's red is wrong
Area pf triangle ?????
Answer:
10
Step-by-step explanation:
using 1/2 base times height, the base being 5 and height being 4 we multiply to get 20, then multiply by 1/2 to get 10.
Bella rolls 2 number cubes 60 times. How many times can she expect the sum of the numbers to be greater than 10?
Answer:
of the 36 possible outcomes, only 3 sum to 11 or 12.
Answer:
12 times
Step-by-step explanation:
becuase 60×2÷10=12
coach miller is using all the ground beef to grill 17 burgers. what is the cost for each burger ?
Answer:
There is not enough information to answer this.
Step-by-step explanation:
Answer:
1.50 I think or it is 2.3 per burger tatal cost not sure but try
Which expression is not equivalent to 8 + (n - 4)?
(8 + n) - 4
n + 4
12 + n
(8 - 4) + n
Answer:
12+n
Step-by-step explanation:
Hi!
8+n-4 = n+4
n+4 = n+4 (Can not be simplified).
(8+n)-4 = n+4
12+n = 12+n (Can not be simplified).
(8-4)+n = n+4
So the answer would be 12+n because it does not equal n+4.
The perimeter of a rectangular garden is 43.8 feet. It’s length is 12.4 feet. What is it’s width?
Answer:
9.5 m
Step-by-step explanation:
If width is -- x
12.4 + x + 12.4 + x = 43.8
2x = 19
x = (19/2)
x = 9.5 m
Thenks and mark me brainliest :))
Please help me I not know how to do these!
Answer:58
Step-by-step explanation:
PLEASE HELP ASAP!!! NO LINKS!!!
Answer:
B
Step-by-step explanation:
A park has a triangular sandbox. Todd wants to create a smaller sandbox at his backyard having the same angles as the park sandbox. Drawings of both sandboxes are shown. 18 ft 20 Park Sandbox 8+ Todd's Sandbox What is the perimeter, in feet (ft), of Todd's sandbox?
Answer:
the perimeter is
104/5 feet or 20 4/5 ft
Step-by-step explanation:
The perimeter is a loop that surrounds, circumscribes, nor defines a two-dimensional shape and a one length.
Perimeter Calculation:A park's sandbox measures [tex]20 \ \text ft[/tex] in diameter at its base.
Todd's sandbox has a [tex]4 \ \text ft[/tex] base.
Now [tex]\frac{4}{20}=\frac{1}{5}\\\\[/tex]
As a result, the scale factor for smaller sandboxes is [tex]\ \frac{1}{5}\\\\[/tex]
[tex]\to 14 \times \frac{1}{5} = 2.8\\\\\to 18 \times \frac{1}{5}= 3.6\\\\[/tex]
As a result, in Todd's sandbox, the missing lengths (in feet) are 2.8 and 3.6.
Todd's sandbox has a perimeter of [tex]4 + 2.8 + 3.6 = 10.4[/tex] feet.
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Solve for x.
2x+3y=20
-2x+y=4
Answer:
x = 1
Step-by-step explanation:
-2x + y = 4
y = 2x + 4
2x + 3y = 20
2x + 3(2x + 4) = 20
2x + 6x + 12 = 20
8x + 12 = 20
8x = 8
x = 1
Select all expressions that are equivalent to 2( - 2x + 5) +x
1. 3x + 10
2. - 3x + 10
3. 4x + 10 + x
4. -4x + 10 + x
Answer:
2) -3x+10
4) -4x+10+x
Step-by-step explanation:
Use the distributive property to get rid of the parentheses.
(2 × -2x) + (2 × 5) + x
-4x + 10 +x is correct, but the x's can be combined.
(-4x + x) + 10 = -3x + 10
Three of the paths in a city park form a right triangle, as shown on the map. Each unit on the map represents 10 meters. The city plans to plant trees along these paths.
The perimeter of the triangle is 188.1 m
How to find the perimeter of the triangle?
The perimeter of a triangle can be determined by adding the three lengths of the triangle.
From the image, the coordinates of vertices of the triangle are:
(-3, 3), (-3, -2) and (3, 3)
distance between (-3, 3) and (-3, -2) is:
3-(-2) = 5 (we use y coordinates only because x are the same)
= 50 m (Each unit on the map represents 10 meters)
distance between (-3, 3) and (3, 3) is:
3-(-3) = 6 (we use x coordinates only because y are the same)
= 60 m
distance between (3, 3) and (-3, -2) is:
= √(50² + 60²) (Pythagoras)
= 78. 1 m
Perimeter = 50 + 60 + 78.1 = 188.1 m
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Complete Question
Check attached image
Joseph's uncle wants to put shingles on the outside walls and solar panel the roof of his barn shown at the right. It costs $2.50 for each square meter of shingles, while solar panals cost $4.00 per square meter. How much will this project cost?
Answer:
The answer is below
Step-by-step explanation:
From the image attached, the measurement of the roof is 5 m by 9 m on both sides. Hence:
Area of roof = 2 (5 * 9) = 90 m²
Since solar panels cost $4.00 per square meter, therefore:
Cost of solar panels = $4.00 per square meter * 90 m² = $360
The area of the front wall of the barn = (8 m * 7 m) + (1/2 * 8 m * 3 m) - (4 m * 4 m) = 52 m²
The area of the back wall of the barn = (8 m * 7 m) + (1/2 * 8 m * 3 m) = 68 m²
Area of each side wall of barn = 9 m * 7 m = 63 m²
Total area of wall = 52 m² + 68 m² + (2 * 63 m²) = 246 m²
Cost of shingles = $2.50 for each square meter * 246 m² = $615
Total cost of project = $615 + $360 = $975
Joan flipped a coin 100 times during a mathematics experiment. The coin landed on tails 36 times. Based on Joan's results, which of these statements is true?
(A)The coin landed on tails more than expected.
(B)The coin landed on heads less than expected.
(C)The coin landed on heads more than tails.
(D)The coin landed on heads less than tails.
A silver ball and a copper ball each have a diameter of 3.5 cm. Which weighs more? How much more?
copper. it has a denser weight
A grasshopper chirp 25 times in 15 seconds. How many times were a grasshopper chirp in two hours
Answer:
2 hours = 7200 seconds
7200/15 = 480
25x480 = 12000 chirps in 2 hours
Step-by-step explanation:
Answer:
200
Step-by-step explanation:
info we are given :
25 chirps per 15 second.
1 hour: 60 minutes since we are trying to find out 2 hours it will be 60+60=120
now divide by 15 and times by 8 (8 x 25)
Identify the 2D shape that is formed by each cross section.
Answer:
answer: rectangle
Step-by-step explanation:
This cross section forms a rectangle. Hope that helps!
Answer:
Rectangle
Step-by-step explanation:
Please see the attached image.
The highlighted shape is a rectangle.
GIVING BRAINLIEST -60 points-
Answer 1, 2, 3 & 4 for brainliest.
Answer:
Answer:
2.
the distance from E to D,D toF and F to E are equal.
Answer:
2
Step-by-step explanation:
the distance from E to D , D to F and F to E are equal.......
Jack paid $560 in fees for a certain duration of club membership dues. The admission fee of the club was $200, and Jack has to pay $30 per month to continue his membership. The function for his club fees is given.
Answer:
12 months or a year
Step-by-step explanation:
I'm guessing you need to know the duration of his membership?
560= 30x + 200
x= months
560 -200 = 360
360/30 = 12 months = 1 year
Answer:
12 months
Step-by-step explanation: