Help needed ASAP will give BRAINLIEST

Answer:

total question =90

she obtained 75% of first 40 questions

2. in order to get 80% out of 90,

the no. of questions got correct by Ama = 80% * 90 = 72

3. As she already got 30 c0rrect in first 40 questions, the number of question she needs correct for remaining 50 = (72-30) = 42

percentage = 42/50*100% = 84%

The number of questions answered correctly on the first 40 questions  is 30.

The questions answered correctly of the 90 questions is 72.

The percentage answered correctly on the last 50 questions is 84%.

Percentage can be described as a fraction of an amount expressed as a number out of hundred.

Number of questions answered correctly on the first 40 questions: 40 x 0.75 = 30

Questions answered correctly of the 90 questions: 90 x 0.8 = 72

Number of questions gotten correctly on the last 50 questions: (0.8 x 90)  30 = 42

Percentage = 42/50 x 100 = 84%

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13) The points A (9,0), B (9,6), C(-9,6), D(-9,0) are the vertices of

A) square ✓✓✓

B) rectangle

C) rhombus

D) trapezium.

۔

Answer:

-15x^2 + 36x + 7

Step-by-step explanation:

Answer:

Step-by-step explanation:

-15x^2  + 40x - 4x + 7

-15x^2 + 36x + 7

Answer:

it's the first one

Step-by-step explanation:

I got it right on edge

The requried, expression to find the value of the given expression when x =-2 and y = 5 is 3²(-2)⁶/5⁴. Option A is correct.

In order to remove pointless terms, factors, or operations from an expression, arithmetic, and algebraic principles are applied. The objective is to get an expression that is simpler to use, manipulate, or solve. For instance, factoring, merging like terms, or applying the distributive property can all be used to simplify an algebraic statement.

Here,
Given expression,
= (3x³y⁻²)²

To find the solution of the above expression given value of x and y,
= (3(-2)³(3)⁻²)²
= (3²(-2)⁶/3⁴)

Thus, the required expression to find the value of the given expression when x =-2 and y = 5 is 3²(-2)⁶/5⁴. Option A is correct.

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Answer:

  91 bpm

Step-by-step explanation:

  (70 bpm)(1 +30%) = 70·1.30 bpm = 91 bpm

Anna's pulse rate is 91 bpm.

Answer:

Infinite number of solutions.  The equations and answers are the same no matter what number x you plug in.  

Step-by-step explanation:

-4(x + 5) = -4x - 20

-4x - 20 = -4x - 20

0 = 0

[tex]\text{Hello there! :)}[/tex]

[tex]\large\boxed{\text{Infinite solutions.}}[/tex]

[tex]-4(x + 5) = -4x - 20\\\\\text{Simplify:}\\\\-4(x) -4(5) = -4x - 20\\\\-4x - 20 = -4x - 20\\\\\\\\\text{Add 4x to both sides:}\\\\-4x + 4x - 20 = -4x + 4x - 20\\\\-20 = -20\\\\\text{Both sides of the equal sign are the same, so:}\\\\\\\text{Infinite solutions.}[/tex]

Answer:

The mean absolute deviation = 3.5°F

Step-by-step explanation:

The sum of the given temperatures, ∑T, is found as follows;

∑T = 66°F + 57°F + 61°F + 65°F + 54°F + 62°F + 59°F + 56°F = 480°F

The number of days, n, over which the temperature was tracked = 8 days

Therefore, the mean, [tex]\bar x[/tex], of the data set = ∑T/n = 480°F/8 = 60°F

The mean absolute deviation is given by the following formula;

[tex]Mean \ absolute \ deviation = \frac{\sum \limits_{i = 1}^{n} \left | x_i - \bar x \right | }{n}[/tex]

Therefore, we have;

66 - 60 = [tex]\left | 6\right |[/tex] = 6

57 - 60 = [tex]\left | -3\right |[/tex] = 3

61 - 60 =  [tex]\left | 1\right |[/tex] = 1

65 - 60 =  [tex]\left | 5\right |[/tex] = 5

54 - 60 =  [tex]\left | -6\right |[/tex] = 6

62 - 60 =  [tex]\left | 2\right |[/tex] = 2

59 - 60 =  [tex]\left | -1\right |[/tex] = 1

56 - 60 =  [tex]\left | -4\right |[/tex] = 4

The mean absolute deviation is therefore;

The mean absolute deviation = (6 + 3 + 1 + 5 + 6 + 2 + 1 + 4)/8 = 3.5°F.

Answer:

33.634 ; 134.536 ; d = √[(50t)² + (45t)²]

Step-by-step explanation:

Given the following :

Toyota Prius = East at 50mph

Dodge Circuit = South at 45mph

Distance apart after 30 minutes :

Distance = speed * time

Distance moved by Prius = ( 50mph × 0.5hr) = 25 miles

Distance moved by Circuit = ( 45mph × 0.5hr) = 22.5 miles

Hence Displacement after 30 minutes :

d = √(25² + 22.5²)

d = √625 + 506.25

d = √1131.25

d = 33.634 miles

Distance apart after 2 hours :

Distance = speed * time

Distance moved by Prius = ( 50mph × 2hr) = 100 miles

Distance moved by Circuit = ( 45mph × 2hr) = 90 miles

Hence Displacement after 2 hours :

d = √(100² + 90²)

d = √10000 + 8100

d = √18100

d = 134.536 miles

Distance d in miles after t hours :

d = √[(50t)² + (45t)²]

Answer:

n = 2

Step-by-step explanation:

4-2 = 2n

[tex]\frac{2n}{4} =2[/tex]

4 x 2 =  8

2 x 2 = 4

8 - 4 = 4

Answer:

50%

Step-by-step explanation:

Answer:

Step-by-step explanation:

a) 10/3

b) 30miles covered in 1/2 an hour

    75 miles covered in 1 1/4 hours

therefore they get there at 4:15pm

c) an airplane covers 50 miles in 1/5 hours. how many miles can the airplane cover in 5 hours?

SOLUTION=5 divided by 1/5=25

50*25=1250 miles

Answer:

sole it

the(<) it wants you to figure out each side and put the inequality in between what you get

Answer:

Step-by-step explanation:

The attached graph shows the depth of the elevators with respect to the time the miners' elevator started.

After 14 more seconds, the positions are ...

  equipment: -6(42) = -252 feet relative to the surface

  miners: -16(14) = -224 feet relative to the surface

The equipment elevator is deeper.

Answer:

AB=

[tex] \sqrt{260} [/tex]

Step-by-step explanation:

plz mark as brainliest if it helps

Answer: 24

Step-by-step explanation:

if line BD = line BC, then

5x - 26 = 2x + 1

3x = 27

x = 9

so if you plug that pack into the original equation for line BC (2x + 1), then line BC is 19 units long. now, subtract that from AC to find the length of AB:

43 - 19 = 24 units

Answer: a

Step-by-step explanation:

Answer:

I have stated the answer about hope it helps

Answer:

10x+15

Step-by-step explanation:

Answer:

10x+15 because when you do the math that is what you get

Step-by-step explanation:

Answer:

1188

multiply the numbers

Answer:

the answer would be

B.) 4/10 6/15 8/20

hope that helps

Answer:

Step-by-step explanation:

(x + 11)/-2 = -8

x + 11 = 16

x = 5

Answer:

13/18

Step-by-step explanation:

26/2= 13

36/2= 18

13/18

Answer: Your answer is 13/18 or in decimal form 0.72

Answer:

3

Step-by-step explanation:

The rate of change is just another way of saying slope.

The slope of a line is it’s rise over run.

We can see here that every time x increases by 1, y increases by 3. (This is where the triangle comes in handy).

Rise:3

Run:1

[tex]\frac{3}{1}=3[/tex]

So the rate of change is 3.

Hope this helped!

Answer:

is 3

Step-by-step explanation:

i got

Answer:

66.59 is the answer

Answer:

66.95

Step-by-step explanation:

Answer is 66.95

Answer:

Step-by-step explanation:

its a

Answer:

I believe it C

Step-by-step explanation:

The graph starts when the value of x is -1 and ends when it's value is 5 , So domain is [-1,5]

The highest value of the graph is 4 which is at x = -1 and the lowest value of the graph is 0 , which is at x = 5, So range is [0,4]

The domain is equal to all the input values (x-values)

The range is equal to all the output values (y-values)

In this problem,

The domain: [-1, 5]

The range: [0, 4]