Witch value of x makes the equation x + 7 = 21 true ?
Answer:
x=14
Step-by-step explanation:
x+7=21
x=14
For an exponential regression equation in the form y=ab^x , a value of 1.101 for b will cause y to get smaller as x gets larger True or false
Answer:
False
Step-by-step explanation:
Please answer correctly !!!!!! Will mark brainliest !!!!!!!!!!!!
Answer:
- [tex]\frac{1}{2}[/tex]
Step-by-step explanation:
The average rate of change of f(x) in the closed interval [ a, b ] is
[tex]\frac{f(b)-f(a)}{b-a}[/tex]
Here [ a, b ] = [ - 8, 2 ] , thus
f(b) = f(2) = - 4 ← read from graph
f(a) = f(- 8) = 1 ← read from graph, thus
average rate of change = [tex]\frac{-4-1}{2-(-8)}[/tex] = [tex]\frac{-5}{10}[/tex] = - [tex]\frac{1}{2}[/tex]
What is the solution to the system of equations?
y=x+3
x=-2
Simply plug in x to the formula to y.
y = -2 + 3
y = 1
and
x = -2
I hope this is what you were looking for.
Answer:
y=1
Step-by-step explanation:
Plug x=-2 into the equation y=x+3:
y=(-2)+3
y=1
A study shows that 35% of the fish caught in a local lake had high levels of mercury. Suppose that 10 fish were caught from this lake. Find, to the nearest tenth of a percent, the probability that at least 6 of the 10 fish caught did not contain high levels of mercury.
Answer:
0.985
Step-by-step explanation:
Given: 35% of the fish caught in a local lake had high levels of mercury.
To find: probability that at least 6 of the 10 fish caught did not contain high levels of mercury
Solution:
Probability refers to chances of occurrence of some event.
Probability = number of favourable outcomes/Total number of outcomes
Let A denotes the event that the fish caught in a local lake had high levels of mercury.
As 35% of the fish caught in a local lake had high levels of mercury,
[tex]P(A)=0.35[/tex]
Probability that at least 6 of the 10 fish caught did not contain high levels of mercury = 1 - probability that 4 of the 10 fish caught contain high levels of mercury = [tex]1-(0.35)^4=1-0.015=0.985[/tex]
4) Every 10 years in April, the population of Boston is recorded. In 1990, Boston had a
population of 4,500 people. From 1990 to 2000, the population increased by 15%. From 2000
to 2010, the population decreased by 4%. That was Boston's population in 2010?
A
4,527
B
4,968
с
4,995
D
5,382
4500 increase it by 15%=675
4500+675=5175
Decrease 4% from 5175
4% of 5175=207
5175-207=4868
Answer=I think it’s b
Which inequality represents all the solutions of 10(3x + 2) > 7(2x − 4)?
Answer:
x>-3
Step-by-step explanation:
Answer:
x > -3
Step-by-step explanation: First you have to distribute the 10 to 3x +2 and 7 to 2x -4 . 10 times 3x + 2 is 30x + 20. 7 times 2x -4 is 14 x -28 . Subtract 20 from both sides, which is 30x = 14x-48 , because -28 minus 20 is -48. Subtract 14 x from both sides which is gonna be 16x >-48 , divide both sides by 16 which is x > -3.
The diagram shows a floor in the shape of a trapezium. Tim is going to paint the floor. Each 5 litre tin of paint costs £16.99 and 1 litre of paint covers an area of 1.9 m2 How much would it cost to buy all the paint he needs? You must show how you get your answer. 0 m 16m £16.99
Answer: £186.89
Step-by-step explanation:
-We are given that each 5l tin of paint costs £16.99 . We therefore divide the paint used by 5 and multiply by £16.99:
Hence, it will cost £186.89 to buy all the paint
Answer:
=£186.89
Step-by-step explanation:
A=1/2(a+b)h
a||b dimensions
A=1/2(16+10)×7.6
=98.8m²
Given that 1 litre of paint covers an area of 1.9 sq m, we divide the area of the trapezium by this and multiply by the price per liter to get total cost:
paint used= Area/paint m²
98.8/1.9
=52 litres
We are given that each 5l tin of paint costs £16.99 . We therefore divide the paint used by 5 and multiply by £16.99
52/2
=10.4
11tins
cost=11×16.99
=£186.89
Which interval contains a local minimum for the graphed function?
A. [-4, -2.5]
B. [-2, -1]
C. [1, 2]
D. [2.5, 4]
Answer:
A
Step-by-step explanation:
the answer is a why do not ask
Given that tan theta = -9/4, where 270° ≤ theta ≤ 360° a)state the 5 trigonometric ratios as a fraction b) determine the value of theta to the nearest degree
Answer:
Step-by-step explanation:
θ lies in 4th quadrant.
cos θ and sec θ are positive all other trigonometric ratios are negative.
sin θ/cos θ=-9/4
sin θ=-9/4 cos θ
we know sin² θ +cos ² θ =1
(-9/4 cos θ)²+cos ² θ =1
cos ² θ (81/16+1)=1
cos ²θ((81+16)/16)=1
cos² θ=16/97
cos θ=4/√97
sin θ=-9/4*4/√97=-9/√97
sec θ=1/cos θ=√97/4
cosec θ=1/sin θ=-√97/9
cot θ=1/tan θ=-4/9
[tex]\ theta=tan^{-1}(-9/4) \approx 294 ^\circ[/tex]
Chris is driving his car at a rate of 32 miles per hour. Albert is driving his car at a rate of 36 miles per hour. Both started driving at the same time. If you were to graph each linear relationship, what would be the difference in the slopes of the lines?
Answer:
Use the formula r = d/t. Your rate is 24 miles divided by 2 hours, so: r = 24 miles ÷ 2 hours = 12 miles per hour. Now let's say you rode your bike at a rate of 10 miles per hour for 4 hours.
Step-by-step explanation:
A polygon is regular when all angles are equal and all sides are equal
True or False
Answer:
True
Step-by-step explanation:
True, because a polygon have all angles that are equal and all lengths are the same length.
Where is g decreasing ? Please answer correctly !!!!!!!! Will mark brainliest !!!!!!!!!!!!
Answer:
x≥ -1 or (-1, ∞)
Step-by-step explanation:
g is decreasing where the slope is negative so after max at -1 so x≥ -1
James is following this recipe to make flapjacks. James uses 600 g of margarine. How many flapjacks is James making? Recipe: Makes 15 flapjacks 120 g sugar 150 ml syrup 200 g oats 120 g margarine 40 g sultanas
Answer:
75 Flapjacks
Step-by-step explanation:
You must divide 120 by 600 in order to get your answer. As it says 120 margirine to make 15 flapjacks which is equal to one batch, you must then divide 600 by 120 and then multiply 5 by 15 to get 75. I hope this helped.
(brainliest?)
What is the product of (x-2)(x+2)?
Answer:
The difference of squares is (a - b)(a + b) = a² - b². Since a = x and b = 2, the answer is x² - 4.
factorise:x²+30x+216
Answer: (x + 12)(x + 18)
Step-by-step explanation: x² + 30x + 216
12 + 18 = 30
12 x 18 = 216
(x + 12)(x + 18)
Answer:
answer would be (x + 12)(x + 18).
Step-by-step explanation:
Let's factor x^2 + 30x + 216
x^2 + 30x + 216
Answer:
(x + 12) (x + 18)
Which inequality pairs with y≤−2x−1 to complete the system of linear inequalities represented by the graph? y<−2x+2 y>−2x+2 y<2x−2 y>2x−2
Answer:Oscar D
Step-by-step explanation:
Answer: B.
Step-by-step explanation:
1/3( 5x - 9) = 2( 1/3x + 6) what is x?
Answer:
x = 9
Step-by-step explanation:
→Distribute the [tex]\frac{1}{3}[/tex] to (5x - 9), and the 2 to [tex](\frac{1}{3} x + 6)[/tex]:
[tex]\frac{1}{3}[/tex](5x - 9) = 2( [tex]\frac{1}{3}x[/tex] + 6)
[tex]\frac{5}{3}x[/tex] + 3 = [tex]\frac{2}{3}x[/tex]+ 12
→Subtract [tex]\frac{2}{3}x[/tex] from both sides:
x + 3 = 12
→Subtract 3 from both sides:
x = 9
The value of x from the given equation is 6.
The given equation is 1/3 (5x - 9) = 2(1/3 x + 6).
The solution of an equation is the set of all values that, when substituted for unknowns, make an equation true.
Here, 5x/3 - 9/3 = 2x/3 +6/2
5x/3 -3 = 2x/3 +3
5x/3 -2x/3 =3+3
(5x-2x)/3 = 6
3x/3 = 6
x = 6
Therefore, the value of x from the given equation is 6.
To learn more about an equation visit:
https://brainly.com/question/14686792.
#SPJ6
a) x2 - 2 = 0 resolver por factorizacion
Answer:
x = ± √2 = ± 1.4142
Step-by-step explanation:
Determine the
equation of a line
that has an
x-intercept of 3 and
a y-intercept of 4.
Answer:
Step-by-step explanation:
x intercept it means y=0 (3,0)
y intercept means x=0 (0,4)
find the slope : y2-y1/x2-x1
y2-y1= 4-0=4
x2-x1= 0-3=-3
m=4/-3
y=mx+b b=4 since x=0
y=-4/3 x+4
What is the answer for this question??
The correct answer is D: 10x = 1000, which simplifies to x = 100
Estimate the solution to the following system of equations by graphing. A. B. C. D.
Answer:
Um where is the question
Step-by-step explanation:
Answer:
b. -1/3,1/2
Step-by-step explanation:
Nancy wants to receive the most return on a $50,000 investment. She has two options. Option 1 gives annual interest at 5% compounded yearly. Option 2 gives annual interest at 3.5% compounded monthly. Which option is better after 3 years, and what is the difference in earned interest? 1Option 2 earns more interest by $3,581.52. Option 2 earns more interest by $2,396.13. Option 1 earns more interest by $2,396.13. Option 1 earns more interest by $3,581.52.
Answer:
Option 1 earns more interest by $2396.13
Step-by-step explanation:
Step 1: Determine the prices
50000(1 + 0.05)^3 = 57881.30
50000(1 + 0.0035/12)^36 = 55527
Step 2: Determine which pays higher
Step 3: Find difference
57881.30 - 55527 = 2396.13
And we have our final answer!
Please help me this is pretty easy I’m just dumb . Tell me wheaten each of the following is a proper fraction(p), and improper fraction (I), or a mixed number (M)
Answer:
1. I,P,M,P
2. P,I,P,M
3. M,P,P,I
4. P,I,M,P
Mason says that (12x+4)-(-3x+5) and 15x -1 are equivalent. Is he correct
Answer:
Yes.
Step-by-step explanation:
I have attached the work to your problem.
Please see the attachment below.
I hope this helps!
Answer:
yes he is correct
Step-by-step explanation:
(12x+4)-(-3x+5)
take out parenthesis,
12x+4--3x-5
simplify,
12x+4+3x-5
do the math,
15x-1
What two number multiply to -21 and add to 20
Answer:
-1 and 21
Step-by-step explanation:
Let the numbers be x and y.
x + y = 20
xy = -21
Solve the first equation for x and substitute in the second equation.
x = 20 - y
(20 - y)y = -21
20y - y^2 = -21
y^2 - 20y - 21 = 0
(y - 21)(y + 1) = 0
y - 21 = 0 or y + 1 = 0
y = 21 or y = -1
For y = 21:
x = 20 - y
x = 20 - 21
x = -1
For y = -1:
x = 20 - y
x = 20 - (-1)
x = 21
Solutions: (-1, 21) and (21, -1)
Answer: the numbers are -1 and 21
Please help me find the volume and explain how you found it in a clear form
Answer:
Let's solve this with 3 calculations
1) Volume of the lower section (highlighted in blue)
3 cm hgt 16 cm long 3 cm wide
Volume = 3 * 3 * 16 = 144 cubic cm
2) Volume of left "block"
Volume = 4 cm hgt * 4 cm long * 3 cm wide =
4 * 4 * 3 = 48 cubic cm
3) Volume of right "block"
length = 16cm - 3 - 4 - 3 = 6 cm
Volume = 4 cm hgt * 6 cm long * 3 cm wide =
4 * 6 * 3 = 72 cubic cm
TOTAL VOLUME = 144 + 48 + 72 = 264 cubic cm
Step-by-step explanation:
Find the following for the function f(x)=3x2+2x−2. (a) f(0) =
Answer:
-2
Step-by-step explanation:
when x= 0
f(0)= 3*(0)² + 2*0 - 2
= 0 + 0-2
= -2
How to solve -5 + 13y = -7
Answer:
y = -2/13
Step-by-step explanation:
-5 + 13y = -7
Add 5 to each side
-5+5 + 13y = -7+5
13y = -2
Divide by 13
13y/13 = -2/13
y = -2/13
Can someone please help me with this please I need the right answer if you don’t know how to do geometry then don’t do this please thank you
Answer:
3. Reflexive property of congruence
(since the statement states that a segment is congruent to itself)
4. SSS
(since 3 sides of one triangle are congruent to three sides of the other triangle)
