* 25. a. Write 3 3/4, as an improper fraction.
(10)
b. Write the reciprocal of answer a.
c. Find the product of answers a and b.

Answer:

the number of protons identifies what element it is, since it has 35 protons it is Bromine

number of protons=atomic number

The element is Bromine which as atomic number of 35.

The number of protons in an atom is equal to atomic number.

It is given that, an atom of a certain element has 35 protons and has 7 valence electrons.

So that, atomic number of atom [tex]=35[/tex]

From periodic table, It is observed that Bromine has atomic number of 35.

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Answer:

V(x) = 4x³ - 110x² + 750x

Step-by-step explanation:

For each side of the base of the open-top box, since x inches is cut out from each side, we have 2x inches removed from each sides dimension.

Since the dimensions of the poster are 30 inches by 25 inches, the area of the base of the open-top box is thus

A(x) = (30 - 2x)(25 - 2x) since we remove 2x inches from each dimension.

Now, the height of the open-top box is x. So, its volume is V(x) = Ax

V(x) = (30 - 2x)(25 - 2x)x

V(x) = (750 - 60x - 50x + 4x²)x

V(x) = (750 - 110x + 4x²)x

Expanding the bracket, we have

V(x) = 750x - 110x² + 4x³

Re-arranging, we have

V(x) = 4x³ - 110x² + 750x

Answer:

y=-3/4x-13/2

Step-by-step explanation:

This should be the answer, I am not 100% though

I did y-4=-3/4x(x+14)

Answer:

False.

Step-by-step explanation:

X can not be less than 8 and also greater than 8 and the same time.

Answer:

x = 135

Step-by-step explanation:

The angles shown are vertical angles and vertical angles are equal.

Answer:

c

Step-by-step explanation:

a is not enough information because the measure of angle 2 could be another random value

b is not correct for the same reason as a

d is not correct because those two angles do not equal 90

c is correct because of a theorem, so basically if you have two angles, and they have segments at 90 angles placed in the specified spots,  they are on the bisector

Answer:

4/5 / 4/9 = 1 and 4/5 mph or B

Step-by-step explanation:

4/5 / 4/9

4/5 times 9/4 = 36/20

36/20 simplified =  9/5

9/5 = 1 and 4/5

Answer:

4/5 over 4/9 = 1 4/5

Explanation:

(Took test)

Step-by-step explanation:

4/5 mile in 4/9 of an hour

0.8 mile in 0.444444444 of an hour

Unit rate: 1.8 miles per hour

0.8 = 8/10 = 4/5

1.8 = 1 4/5

Answer:

I think its 12

good luck

Answer:

d the other equations the total is 35. this one the total would be 55

Answer:

17 and 13

Step-by-step explanation:

Answer:

Step-by-step explanation:

Represent this with two linear equations:

x+4 = y

x * y = 221

substitute for y:

y= 221/x

Plug this back into first equation:

221/x = x +4

x^2 + 4x = 221

x^2 + 4x -221 = 0

Solve this with a quadratic:

x = -17, x = 13

take the values of 17 and 13, which satisfy the given conditions

Answer:

About 12%

Step-by-step explanation:

Answer:

The cost exceeded the budgeted cost by 14%

Step-by-step explanation:

Supplies for last year cost 1,477, which was 177 over budget. So, the budgeted cost was:  1477 - 177 = 1300

Suppose, the cost of supplies exceeded the budgeted cost by  

So, the amount of exceeded cost  dollar.

Thus, the equation will be......

13x = 177

x= 177/13 = 13.615 = 14

(Rounded to the nearest 1%)

So, the cost exceeded the budgeted cost by 14%

Answer:

5 x T = L

Step-by-step explanation:

Answer:

PQ R s parallelogram

< Q = < s = 114

< P = 180 _ 114 = 66

<2 = 66 / 2 = 33

< I = 114 / 2 = 5 7

< I + < 2 = 3 3 + 57 = 90

< ( STP ) = 90

TP I ST

Answer:

if two lines are not on the same plane, then the lines are skew.

Step-by-step explanation:

if p statement is called the hypothesis of the conditional statement.

then q statement is called the conclusion of the conditional statement.

Answer:

b,  i did the quiz

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Answer:

For the first one if solving for y, y=−8x−16. If solving for x,

x= −1/8y-2

For the second one if solving for y, y=3x−5 and if solving for x,

x=1/3y +5/3

Answer:

x = 7

Step-by-step explanation:

You minus 8 from both sides which becomes, 5x = 35,

35 ÷ 8 = 7

Check work:

5 times 7 = 35.

35 + 8 = 43

The solution is: solve of the equation 5x + 8 = 43 is:  x = 7.

Here, we have,

given that,

the equation is: 5x + 8 = 43

now, we have to solve this.

so, we have,

5x + 8 = 43

we minus 8 from both sides which becomes,

5x = 35

we know that, 5 times 7 = 35

Divide 5 on both sides so that the only thing remaining on the left side is the variable x.

so, x = 7

Final Answer: 7

Hence, The solution is: solve of the equation 5x + 8 = 43 is:  x =7.

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Answer:

El perímetro de la región impresa es 72 cm y su área es 288 cm².  

Step-by-step explanation:

1. Tenemos el perímetro de la hoja de papel:

P₁ = 96 cm = 2l₁ + 2a₁  (1)  

Como sabemos el margen superior, inferior, izquierdo y derecho podemos encontrar la relación entre el largo y ancho del rectángulo interno (región impresa) con el largo (l) y ancho (a) del rectángulo externo (hoja de papel):      

[tex] l_{2} = l_{1} - (m_{s} + m_{i}) = l_{1} - (3 cm + 2 cm) = l_{1} - 5 cm [/tex]  (2)            

[tex] a_{2} = a_{1} - (m_{d} + m_{iz}) = a_{1} - (2 cm + 5 cm) = a_{1} - 7 cm [/tex]   (3)    

El perímetro del rectángulo interno es:

[tex] P_{2} = 2l_{2} + 2a_{2} [/tex]    (4)

Introduciendo la ecuación (2) y (3) en (4):

[tex] P_{2} = 2l_{2} + 2a_{2} = 2(l_{1} - 5 cm) + 2(a_{1} - 7 cm) = 2l_{1} + 2a_{1} - 10 cm - 14 cm = 96 cm - 24 cm = 72 cm [/tex]  

Por lo tanto el perímetro del rectángulo interno (región impresa) es 72 cm.

2. Ahora para encontrar el área rectángulo interno debemos encontrar el largo y ancho del mismo, sabiendo que:

[tex] l_{2} = 2a_{2} [/tex]     (5)

Introduciendo (5) en (4):

[tex] P_{2} = 2l_{2} + 2a_{2} = 2*2a_{2} + 2a_{2} = 6a_{2} [/tex]

[tex] a_{2} = \frac{P_{2}}{6} = \frac{72 cm}{6} = 12 cm [/tex]

[tex] l_{2} = 2a_{2} = 2*12 cm = 24 cm [/tex]

Entonces el área es:

[tex] A_{2} = l_{2}*a_{2} = 12 cm*24 cm = 288 cm^{2} [/tex]

Por lo tanto el área del rectágulo interno (región impresa) es 288 cm².      

Espero que te sea de utilidad!  

Answer:

C. She treated all numbers as positive.

Step-by-step explanation:

-2 1/4 and -1 are less that 0.1

Answer:

C

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

Answer:

Marta predicted correctly 6 out of 13 football games .

[tex]\longrightarrow[/tex][tex]\sf {\dfrac {6}{13}}\times 100 [/tex]

[tex]\longrightarrow[/tex][tex]\sf {\dfrac {600}{13}}[/tex]

[tex]\longrightarrow[/tex][tex]\sf 46.15\% [/tex]

[tex]\longrightarrow[/tex][tex]\sf {\dfrac {6+x}{13+x}}={\dfrac {65}{100}} [/tex]

[tex]\longrightarrow[/tex][tex]\sf 100 (6+x)=65 (13+x)[/tex]

[tex]\longrightarrow[/tex][tex]\sf 600+100x=845+65x [/tex]

[tex]\longrightarrow[/tex][tex]\sf 100x-65x=845-600 [/tex]

[tex]\longrightarrow[/tex][tex]\sf 35x=245 [/tex]

[tex]\longrightarrow[/tex][tex]\sf x={\dfrac{245}{35}}[/tex]

[tex]\longrightarrow[/tex][tex]\sf x=7 [/tex]

[tex]\longrightarrow[/tex][tex]\sf {\dfrac {6+x}{13+x}}[/tex]

[tex]\longrightarrow[/tex][tex]\sf {\dfrac {6+7}{13+7}}[/tex]

[tex]\longrightarrow[/tex][tex]\sf {\dfrac {13}{20}}[/tex]

[tex]\therefore [/tex] Marti needs to predict more 13 games out of 20 to raise her percentage to 65%.

Answer:

14 minutes

Step-by-step explanation:

divide 2.50$ by 0.17$ and u get 14 minutes if you round it

Answer: Yes he can make the trip without having to refuel.

The distance between the two cities is 500 miles.

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Work Shown:

half a foot = 1/2 ft = (1/2)*(12 inches) = 6 inches

Based on the scale given, we can say,

(map length)/(real length) = (map length)/(real length)

(1.5 inches)/(125 miles) = (6 inches)/(x miles)

1.5/125 = 6/x

1.5x = 125*6 ............. cross multiply

1.5x = 750

x = 750/1.5 .......... divide both sides by 1.5

x = 500

The two cities are 500 miles apart. Since this is less than 580, he can make the trip without having to refuel.

This is assuming he drives directly from the first city to the second, without any additional pitstops or detours. Though in reality, straight line distance on a map doesn't always necessarily correspond to the road distance traveled (since the road tends to wind or curve often). However, for the sake of this problem, we'll just assume the road is a straight line to keep things simple.

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Another approach:

1.5 inches = 125 miles

3 inches = 250 miles ..... multiply both sides by 2

6 inches = 500 miles .... multiply both sides by 2

half a foot = 500 miles

So half a foot on paper corresponds to 500 miles in real life.

Answer:

x=50

Step-by-step explanation:

Answer: x = 4/3 or x = 1.3 or x = 1 1/3

Step-by-step explanation: you have to move everything that does Not have A Variable to the right and solve the equation

9x + 12 = 24

9x = 24 - 12

    = 12

x = 12/9

I am confused too. This is the best I can do :(

Answer:

29

Step-by-step explanation:3(2x1+3)-4(1-3)+3x2

Answer:

X = 1/2

Step-by-step explanation:

JK = NO

4x + 24 = 26

4x = 2

x = 1/2