Factorise x^2 + 7x - 78 = 0

Answer:

24 problems

Step-by-step explanation:

equation: 80/100 = x/30

cross multiply: 100 * x = 80 * 30

multiply: 100x = 2400

divide each side by 100: x = 24

24 problems

I hope this helped, please mark Brainliest, thank you !!

The problems on the test the student got correctly is 24.

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

80% of the questions were gotten correctly.

Number of questions gotten corrected = percentage gotten currently x number of questions

80% x 30

= 0.8 x 30 = 24.

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Answer:

[tex]\huge\boxed{216 \ \text{in}^2}[/tex]

Step-by-step explanation:

We can find the surface area of an object by finding the area of all its sides and adding them up.

We know that a cube has 6 identical sides. Therefore, we can just find one side and multiply by 6.

A cube is made up of 6 squares. We can find the area of this square by squaring the length (multiplying it by itself).

Since the length is 6, that means the area of one side of the cube must be [tex]6^2 = 6 \cdot 6 = 36 \ \text{in}^2[/tex]

Since there are 6 identical sides, the total surface area must be:

[tex]36 \cdot 6 = 216 \ \text{in}^2[/tex]

Hope this helped!

Answer :

Option A) 84°

Step-by-step explanation:

Its an equilateral triangle ( since DE and EF = 5)

So they have the same angles as well ..

which means angle D = 48° and angle F = 48°

angle D + angle F + angle E = 180° (angle sum property)

48° + 48° + angle F = 180°

96° + angle F = 180°

angle F = 180° - 96°

= 84°

Answer:

84°

Step-by-step explanation:

It's an equilateral triangle (since DE and EF = 5)

And they have the same angles as well.

Which means the angles D=48° and angle F=48° angle D+ angle F+ angle E=180° (angle sum property) 48°+48°+ angle F=180°, 96°+ angle F=180° angle F=180°-96°=84°.

Note: I hoped this answer helped you!

Source:

The image is provided for proof.

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Answer:

15

Step-by-step explanation:

Answer:

1. they are congruent

2. 180 degrees

Answer:

80*

80*

75*

120*

Step-by-step explanation:

both angle 1 and 2 for the first image have the same value as  the other angle of 80* because it is a set of parallel lines and one line going through it.

1 on the next set of images is 75* because is is an alternate exterior angle.

2 of the last set of images is 120* because it is same side interior angles.

Answer:

i think its b

Step-by-step explanation:

i hope its the right Answer

Answer:  A

Step-by-step explanation: Because since its a Parallel  line, it would be independent and it would be a inconsistent since we have no solutions and since we got no solutions, it would be a inconsistent. Hope it helps and is correct. :D

[tex]10 \sqrt{1 } \sqrt{2} [/tex]

We can use the Ray tool to graph the absolute value function f(x) = 2|x+2| + 1, which helps us visualize the function by plotting specific points on the coordinate plane.

1. Begin by understanding the structure of the absolute value function f(x) = |x|. The absolute value function takes any input x and returns the positive value of x, making it symmetric concerning the y-axis.

2. In the given function f(x) = 2|x+2| + 1, the "2" in front of the absolute value affects the vertical scale, while the "+2" inside the absolute value causes a horizontal shift of 2 units to the left.

3. Start plotting points on the coordinate plane. To determine the behavior of the graph, consider a few x-values.

  - When x = -4, we have f(-4) = 2|-4+2| + 1 = 2| -2| + 1 = 2(2) + 1 = 4 + 1 = 5. So, we have the point (-4, 5).

  - When x = -2, we have f(-2) = 2|-2+2| + 1 = 2| 0| + 1 = 2(0) + 1 = 1. So, we have the point (-2, 1).

  - When x = -1, we have f(-1) = 2|-1+2| + 1 = 2| 1| + 1 = 2(1) + 1 = 3. So, we have the point (-1, 3).

  - When x = 0, we have f(0) = 2|0+2| + 1 = 2| 2| + 1 = 2(2) + 1 = 5. So, we have the point (0, 5).

  - Continue this process for other values of x to obtain more points.

4. Plot all the points on the graph and connect them smoothly. Remember to maintain symmetry concerning the y-axis due to the absolute value function.

5. The resulting graph will have a "V" shape, with the vertex at the point (-2, 1). The line will extend upward on both sides, following a steep slope with a vertical stretch of 2.

6. Label the axes and any other relevant points to complete the graph.

By following these steps and utilizing the Ray tool, you can accurately graph the given absolute value function f(x) = 2|x+2| + 1.

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Answer:

she can buy 10 bananas and 5 asparagus

Step-by-step explanation:

Answer:

Paige can buy 5 Asparagus and 10 bananas

Step-by-step explanation:

Let me = the minutes we are searching for.

(-2.5)/11_1/4 = 1/m

Rewrite 11_1/4 as 45/4.

(-2 5)/(45/4) = 1/m

Cross-multiply to find m.

45/4 = -2.5m

Divide both sides by -2.5.

45/4 ÷ -2.5 = m

Use your calculator and good luck.

Answer:

that is wrong you know, right?

Step-by-step explanation:

Answer:

3.489 * 10^-5

Step-by-step explanation:

Answer:

altitude

Step-by-step explanation:

It cant be a perpendicular bisector because its not splitting the triangle into equal lengths.

Answer:

a=-8 b=2

Step-by-step explanation:

x^2+6x-16

x^2+(8-2)x-16=0

x^2+8x-2x-16=0

X(X+8)-2(X+8)=0

(X+8)(x-2)=0

Compare with (X+a)(X+b)

Where we get a=-8 b=2

Answer:

(0, 3)

Step-by-step explanation:

Subtract 3 units from the X-coordinate

Add 4 units from the Y-coordinate

9514 1404 393

Answer:

  F  HL

Step-by-step explanation:

No right angle is shown, so the HL theorem cannot be used.

Answer:

Step-by-step explanation:

Step one:

given data

pancakes =$5.95,

sausage = $1.50, and

orange juice =$1.75.

Total amount spent =5.95+1.50+1.75= $9.2

Step two:

15% of $9.2

=15/100*9.2

=0.15*9.2

=$1.38

Greg gave a tip of $1.38

Answer:

The Vampire Diaries and the spin offs 100%

THE UMBRELLA ACADEMY <3

It's really good, 7 brothers have super powers and they are gonna try to stop the apocalipse. My favorite character is Five btw, i'm simping on him lol

Answer:

14

Step-by-step explanation:

f(x)=x^2+3x-5

f(3)=(3)^2+3(3)-5

f(3)=9+9-5

f(3)=14

Answer

F(3)=13

Step-by-step explanation:

Ans1wer: 10x^2

Step-by-step explanation:

10x^2+2x^2=12x^2 and -4y-y=-6y

Answer:

11 ; 12°

Step-by-step explanation:

3x + 28 + 2x - 10 + 5x + 52 = 180

10x = 180 - 70

x = 11

m∠C = 2(11) - 10 = 12°

Answer:

Angle ACB = 12°

Step-by-step explanation:

All angles in a triangle always add up to 180°, which gives us an equation to solve for x:

3x + 28 + 5x + 52 + 2x -10 = 180

Combine like terms

10x + 70 = 180

Subtract 70 from both sides

10x = 110

Divide both sides by 10

x = 11

Now we know the value of x, we need to just plug it in to angle ACB's given value:

2(11) - 10 = Angle ACB

22 - 10 = Angle ACB

12 = Angle ACB

Answer:

two and one third + 2x ≥ 4

Step-by-step explanation:

From the information given:

The number of hours Nicole already practiced with  = [tex]2 \dfrac{1}{3}[/tex]

However, she wants to further her practice for 2 days and make sure that each day equal each other

Let consider y be the hours she practiced each day

Then, the number of hours she will practice in two days will be 2y

Thus, the total number of hours she practiced can be computed as

= [tex]2 \dfrac{1}{3}+2[/tex]

Suppose Nicole desire to practiced for at least 4 hours,

Then,

[tex]2 \dfrac{1}{3}+2 \ge 4[/tex]

Therefore, the required inequality to determine the  minimum number of hours she needs to practice on each of the 2 days suppose she practiced for at least 4 hours a day is:

two and one third + 2x ≥ 4    i.e. [tex]2 \dfrac{1}{3}+2 \ge 4[/tex]

Answer:

J. -13-18

Step-by-step explanation:

J will give the value -31

Answer:

30%

Step-by-step explanation:

Answer:

There can be many possibilities

Possibilities:

one possibilities that is perfect according to me is:-

15questions of 2 points

15×2=30 points

.

.

10questions of 3 points

10×3=30 points

.

.

Total =30+30=60 points

.

.

Hope it helped you

lf not then I am sorry for this.

Bye

.

.

Good morning

Good evening

Good night

The system reveals that there are 15 questions worth 2 points and 10 questions worth 3 points on the test.

Given:

Total question = 25

Marks for question= 2 or 3 points

Total marks = 60

Let x be the 2-point questions and y be the number of 3-point questions.

As, there are a total of 25 questions then

Equation1 : x+ y= 25

and, total points in the test is 60 then

Equation 2 : 2x+ 3y = 60

From equation 1: y= 25 -x.

Substitute y = 25 -x  into the Equation 2

2x + 3(25-x) = 60

2x + 75- 3x= 60

75 - x = 60

-x = 60 - 75

-x = -15

x= 15

Now, the value of y is

y = 25 -x

y = 25 - 15

y =  10

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Answer:

Explanation below.

Step-by-step explanation:

Let's say for example you have 100 dollar or euros, or whatever you work with in your country. 30% of 100 equals 30.

If they ask you for example 30% of 250 dollar/euro, it is 250/100 * 30, which equals 75.

If they say there are sales that go up to 30%, all you do is as follows;

1) You calculate how much money 30% is. [Look above]

2) You distract the 30% FROM the original price.

Example; A shirt costs 300 dollar/euro, but there's a sale of 30% on it.

30% of 300 = 100

300-100 = 200

The shirt costs 200 dollar/euro.