Mathematics High School

## Answers

**Answer 1**

**Answer:**

2. 2/3

3. 8

4. 6 3/4

5. 6 2/3

6. 3 1/2

7. 2 2/5

8. 6

9. 2 7/10

**Step-by-step explanation:**

Please find step-by-step explanation in my attached workings. Hope this helps.

## Related Questions

The probability that a student plays tennis is 40% and the probability that a student is

right-handed is 85%. The probability that the student plays tennis and is right-handed is

30%. Draw a Venn Diagram

### Answers

**Venn diagrams **are pictorial representations of set notations

How to determine the venn diagram

Represent the **event **that a student plays tennis with A, and the **event **that a student is right-handed with B

So, we have the following **notations**

n(A) = 40%

n(B) = 85%

n(A n B) = 30%

Next, we draw the **Venn diagram **where the **intersection** of A and B is represented with 30%

See attachment for the **Venn diagram**

Read more about **Venn diagrams** at:

https://brainly.com/question/2099071

If a pentagon has a radius of 16 find the perimeter

### Answers

**Answer****:**

**94.05 units is the perimeter of this pentagon.**

**Length of each side in pentagon: 2r × Sin(180/n)**

** ** *where r is radius and n is number of sides*

**Using the formula**: 2r × Sin(180/n)

: 2*16 * sin(180/5)

: 18.8 units

**Perimeter** = 5(18.8) units........5 as we know pentagon has 5 sides

= 94.05 units

PLEASE HELP ASAP!!! will mark brainlest!! find the area.

### Answers

**Answer:**

52

**Step-by-step explanation:**

Evelyn bought snacks for her team's practice. She bought a bag of chips for $2.99 and a 20-pack of juice bottles. The total cost before tax was $36.39. Write and solve an equation which can be used to determine jj, how much each bottle of juice costs.

### Answers

**Answer:**

1.67 each bottle Because if u do 36.39-2.99= 33.40divided by 20 =1.67 each bottle

**Step-by-step explanation:**

Which geometric figures are drawn on the diagram? Check all that apply.

Line segment C A

Ray A C

∠ABC

Circle C

Ray B E

∠BCE

Line segment A E

### Answers

Answer:

A. CA -

B. CA->

D. 0c

E. <BCE

Step-by-step explanation:

Solve the following:

4x-1 =x+7

——-

2

### Answers

4x-1=2(x+7)

= 4x-1=2x+14

= 4x-2=14+1

= 2x=15

= x=15/2 =7.5

Can someone pls help me with this I have no clue what I’m supposed to be doing

### Answers

Given this is a right triangle

85^2 = 7225

84^2 = 7056

85^2 - 84^2 = 169 = 13^2

Sin QR / QP = sin 84 / 85 = 81.2 deg

how do you solve x-3y=7

4x+2y=14

### Answers

X=4 y=-1

This is the solution

a super slim diet claims to help you lose 6lb in two weeks. the slim off diet claims to help you lose 3.5kg a week which diet claims the largest loss?

### Answers

**Answer:**

The slim-off diet claims the largest loss.

**Step-by-step explanation:**

The slim off claims to lose 3.5kg(7.7 pounds) in a week,

whereas super slim claims to lose 6 pounds in 2 weeks.

**Answer:**

3.5 kg

**Step-by-step explanation:**

if you convert 6 Ib and 3.5 kg to grams you get

6 Ib = **2721.6** grams

3.5 kg = **3500 **grams

Since 3.5 kg has more grams lost from the diet.

61.7 is what percent of 64? Round to the nearest thousandth.

### Answers

**Answer:**

96.406%

**Step-by-step explanation:**

(61.7 ÷ 64) x 100 = 96.40625 = 96.406% (nearest hundredth)

can someone explain how to solve the equation 4k + 6 = –9 + 9k

### Answers

ANSWER: 3

collect like terms

4k-9k

= -5k

subtract

-9-6

= -15

divide -5 on both sides

-5/-5 -15/-5

k=3

**Answer:**

3

**Step-by-step explanation:**

4k+6=-9+9k

4k-9k+6=-9

-5k+6=-9

-5k=-9-6

-5k=-15

5k=15

k=15/5

k=3

Four times a number,added to 9 ,is 41.find the number

### Answers

**Answer:**

8

**Step-by-step explanation:**

41-9=32

32/4=8

solve pls brainliest

### Answers

24/5 or 4.8 or 4 4/5

A diamond ring was reduced from $999.99 to $299.99. Find the percent decrease in the price. Round the answer to the nearest tenth of a percent.

### Answers

**Step-by-step explanation:**

999.99 × x% = 299.99

999.99÷100 × x = 299.99

9.9999 × x = 299.99

9.9999x = 299.99

D.B.S by 9.9999 to make x the subject

9.9999x÷9.9999 = 299.99÷9.9999

x=29.999299993

To the nearest tenth of a percent, x=30

Therefore, x = 30%

Solve the inequality x - 4 < -3. Then graph the solution set. Show your work.

### Answers

Answer:

x < 1

Step-by-step explanation:

x - 4 < - 3

+ 4 +4 Do inverse operations by adding 4 on both sides

x < 1

Therefore, the answer is x < 1.

(It isn't allowing me to attach a photo but I am just going to try make a visual of the graph below)

<------------------------------o------------------>

-4 -3 -2 -1 0 1 2 3 4

The circle is open because based on the concept that in inequalities, less/greater than and/or equal to (such as these ≥ ≤ ) signs are graphed with closed circles, while less/greater than (like these > <) signs are graphed with open circles. The direction of the arrow is moving to the left on the number line because all possible values for x would be less than 1. When graphing the inequality you would use a solid line rather than a dashed line (I had to improvise since I could not attach an image).

From the observation deck of a skyscraper, Harper measures a 45^{\circ} ∘ angle of depression to a ship in the harbor below. If the observation deck is 1145 feet high, what is the horizontal distance from the base of the skyscraper out to the ship? Round your answer to the nearest tenth of a foot if necessary.

### Answers

The** horizontal distance **between the base of the skyscraper to the ship is 1145 feet.

Data;

Angle = 45 degreeObservation deck (adjacent) = 1145 fthorizontal distance (opposite) = x

Trigonometric Ratios

Using trigonometric ratios, we have the value of **adjacent **and** angle**, we can easily use **tangent **of the angle to find the horizontal distance

[tex]tan\theta = \frac{opposite}{adjacent}[/tex]

Substitute the values into the equation and solve

[tex]tan45 = \frac{x}{1145}\\ x = 1145tan45\\x = 1145ft[/tex]

The** horizontal distance **between the base of the skyscraper to the ship is 1145 feet.

Learn more on **trigonometric ratio** here;

https://brainly.com/question/4326804

What are the ordered pairs of the

solutions for this system of equations?

### Answers

**Answer:**

x[tex]x {}^{2} - 2x - 2x + 12 - 3[/tex]** **

I need help I do not understand this

### Answers

**Step-by-step explanation:**

the slope of a line is its inclination and is expressed as ratio of "y coordinate change / x coordinate change" when going from one point to another on the line.

now, I see 2 "good" points on the chart (I mean by that points with integer coordinates) :

(0, 10)

(20, 100)

so, between these 2 points

x changes by +20 (from 0 to 20).

y changes by +90 (from 10 to 100).

so, the slope is +90/+20 = 9/2

Please help me brainliest reward

### Answers

**Step-by-step explanation:**

it would be best to answer by the pictogram

what is this helppp 1/2 + 1/5

### Answers

**Answer:**

[tex] \frac{1}{2} + \frac{1}{5} \\ \\ = \frac{5 + 2}{10} \\ \\ = \frac{7}{10} [/tex]

**Answer:**

0.7 or 7/10

**Step-by-step explanation:**

1/2 is 0.5 and 1/5 is 0.2 which is 0.7 when added together or 7/10

Pls help me it’s due today

### Answers

**Answer:**

x = 6.4

**Step-by-step explanation:**

Set up using proportion and cross multiply to solve:

8/10 = x/8

x = 6.4

Please help !!!!!!!!!!

### Answers

**Answer:**

Whole number is 16

**Step-by-step explanation:**

Whole number are 0,1,2,3,........

**Answer:**

16!

-8 is the absence of number

0.23 isn't a full number neither is 4/5 and 2.54

what’s the length of the square game board with that area ?

### Answers

**Answer:**

11.74m

**Step-by-step explanation:**

138 = a*a

a = √138 = 11.74m

**Answer:**

**11.74m**

**Step-by-step explanation:**

**138 = a*a**

**a = √138 = 11.74m**

Simplify the following expression: 5x + 8 + 7x − 8x − 4 (1 point)

7x2 + 13x + 4

7x2 − 3x + 12

7x2 − 3x + 4

7x2 + 13x + 12

### Answers

**Answer:**

10x2 − 13x + 6

**Step-by-step explanation:**

hope that help .

Let's simplify step-by-step.

5x+8+7x2−8x−4

=5x+8+7x2+−8x+−4

Combine Like Terms:

=5x+8+7x2+−8x+−4

=(7x2)+(5x+−8x)+(8+−4)

=7x2+−3x+4

Answer:

=7x2−3x+4 hence, C

please help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

### Answers

**Answer:**

4 packages

**Step-by-step explanation:**

450 can be divided by 100 4 whole times, the extra cards cannot be added into a package

Answer: 4

Step-by-step explanation:

100 can go into 450 only 4 times

Hope this helped

help pleaseeeeee????

### Answers

**Hey hey!**

To figure out the congruence you have to look at the lines and ticks on both triangles.

So when it gives you one letter you know it's asking for an angle.

And when it gives you two letters you know it's a segment.

When it gives you three letters you're looking for an angle.

**A)**

<A = <X

<B = <Z

<C = <Y

**B)**

AB = XZ

AC = XY

BC = ZY

**C) **

This one is a little tricky, so when it gives you a three-letter angle you have to look at the 'samwitched' letter, which in this case would be A.

To answer this first you have to figure out what angle corresponds to A which would be X.

And then to answer you could say either YXZ or ZXY as long as the X is in the middle it's okay.

**I hope this helps a bit :) **

**Please feel free to comment with any questions!! **

Factor. 9x^2+42xy+49y^2

Enter your answer in the box

### Answers

[tex]\qquad \qquad\huge \underline{\boxed{\sf ᴀɴsweʀ}}[/tex]

The factorized form of the given equation is ~

[tex] \boxed{ \sf(3x + 7y) {}^{2} }[/tex]

Let's solve ~

[tex]\qquad \sf \dashrightarrow \: 9 {x}^{2} + 42xy + 49 {y}^{2} [/tex]

[tex]\qquad \sf \dashrightarrow \: (3x) {}^{2} + 2(3x \times 7y) + (7y) {}^{2} [/tex]

Now, as we can see, an Identity is applied here ~

that is ;

[tex]\qquad \sf \dashrightarrow \: {a}^{2} + 2ab + {b }^{2} = (a + b) {}^{2} [/tex]

So, let's use this identity in our next step, taking :

a = 3x

b = 7y

[tex]\qquad \sf \dashrightarrow \: (3x + 7y) {}^{2} [/tex]

What is the answer for y and x

### Answers

**Answer:**

x=128°

y=52°

**Step-by-step explanation:**

explanation is in the image above

Jacob earned $370 walking dogs over the summer. He put 30% of what he earned into his savings account.

How much money did Jacob put into his savings account?

Enter your answer in the box

### Answers

I don't think I need to explain it, the answer is $111

**Answer: $111**

**Step-by-step explanation:**

Can a function be differentiable but not continuous.

### Answers

**Answer:**

We see that if a function is differentiable at a point, then it must be continuous at that point. There are connections between continuity and differentiability. If is not continuous at , then is not differentiable at . Thus from the theorem above, we see that all differentiable functions on are continuous on

**Step-by-step explanation:**