Multiply. (3x + 5)(3x – 5)
A. 9x2 – 30x – 25
B. 9x2 + 30x + 25
C. 9x2 – 25
D. 9x2 + 25

The time Jack left Santa Clara is 1 : 55 pm

A word problem in math is a math question written as one sentence or more. These statements are interpreted into mathematical equation or expression.

The time for Jack to walk to lose Altos is 25 min and he uses another 25mins to work to Palo alto.

Therefore, the total time he spent is

25mins + 25 mins = 50 mins

He arrived Palo at 2 :45 pm, therefore the time he left Santa Clare will be ;

2:45 pm = 14 :45

= 14:45 - 50mins

= 13:55

= 1 : 55pm

Therefore he left at 1:55 pm

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Answer:

A. 3 1/4 ÷ 3/4

Step-by-step explanation:

3 1/4 is being divided by 3/4, 4 times, the remainder is 1/4

Answer:

Area of each triangular base

= (1/2)(6)(8) = 24 cm^2

Area of bottom rectangular base

= 8(20) = 160 cm^2

Area of back rectangular base

= 6(20) = 120 cm^2

Area of sloped rectangular base

= 10(20) = 200 cm^2

Total surface area

= 2(24) + 160 + 120 + 200 = 528 cm^2

The area of each face of the triangular prism and the total surface area will be;  528 cm²

The area of each triangular face ;

 A = 1/2bh

The triangular faces have a base of b=8 cm and a height of h=6 cm thus area is ...

A = 1/2(8 cm)(6 cm) = 24 cm²

Since Each of the rectangular faces has a length of 20 cm. The width depends on which face is of interest.

the area is given...

 A = LW

Bottom face:

A = (20 cm)(8 cm) = 160 cm²

Back face:

A = (20 cm)(6 cm) = 120 cm²

Sloped face:

A = (20 cm)(10 cm) = 200 cm²

Now we have total area is the sum of the areas of all of the faces and bases. There are two triangular bases,

 (2×24 + 160 +120 +200) cm² = 528 cm²

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Answer:

2.5

Step-by-step explanation:

Given expression:

\(6 \times \left(\dfrac{2}{3} \div 2\right)+0.5\)

Following the order of operations (PEDMAS), carry out the calculation inside the parentheses first.

When dividing a fraction by a whole number, first covert the whole number into a fraction:

\(\implies 6 \times \left(\dfrac{2}{3} \div \dfrac{2}{1}\right)+0.5\)

When dividing fractions, flip the second fraction (swap the numerator and denominator), then multiply:

\(\implies 6 \times \left(\dfrac{2}{3} \times \dfrac{1}{2}\right)+0.5\)

\(\implies 6 \times \left(\dfrac{2 \times 1}{3\times2}\right)+0.5\)

\(\implies 6 \times \left(\dfrac{2}{6}\right)+0.5\)

\(\implies 6 \times \dfrac{2}{6}+0.5\)

Now carry out the multiplication:

\(\implies \dfrac{6 \times2}{6}+0.5\)

\(\implies \dfrac{\diagup\!\!\!\!6 \times2}{\diagup\!\!\!\!6}+0.5\)

\(\implies 2+0.5\)

Finally carry out the addition:

\(\implies 2.5\)

2.5

6*(2/3)/2 + 0.5

6*1/3 + 0.5

2 + 0.5

=2.5

The solution to the inequality 1 + 3r > 10 is r > 3.

This means that any value of r greater than 3 will satisfy the inequality.

To solve the inequality 1 + 3r > 10, we need to isolate the variable r on one side of the inequality sign.

Let's begin by subtracting 1 from both sides of the inequality:

1 + 3r - 1 > 10 - 1

This simplifies to:

3r > 9

Next, we can divide both sides of the inequality by 3 to solve for r:

(3r)/3 > 9/3

This simplifies to:

r > 3

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Reason:

The x value x = 4 repeats itself. We have the input x = 4 lead to multiple outputs (y = 0 and y = 2) at the same time. This is enough evidence to conclude we do not have a function.

A function is only possible if any given input leads to exactly one output.

If you were to plot these points, then you should note (4,0) and (4,2) fail the vertical line test. To pass the vertical line test, it should be impossible to draw a single vertical line through more than one point.

Answer:

24 is the number. The sum of its digits is 6.

Step-by-step explanation:

There are four two-digit numbers the product of whose digits is 8: 18, 24, 42, and 81. Of these numbers, 24 is four times the sum of its digits:

24 = 4 × 6 = 4 × (2 + 4)

Answer:

60 on the first day and 80 on the second

Step-by-step explanation:

the first day was lesser than the second day by 20 minutes.

so the second day was more than the first day by 20 minutes.

Answer:

BCF and GFC

EFC and DCF

because they are alternate

Answer:

2nd one ( Efc & dcf ) & 4th one (Bcf & gfc) .

Step-by-step explanation:

Hope it helps .

Answer: in the third draw 33.33% people eliminated.

Step-by-step explanation:

9514 1404 393

Answer:

  arc SQ = 95°

Step-by-step explanation:

The measure of an inscribed angle is half the measure of the arc it subtends. Hence long arc QR is twice the measure of inscribed angle QSR.

  long arc QSR = 2×95° = 190°

The sum of measures of arcs of a circle is 360°, so we have ...

  arc QS +arc SR +long arc RQ = 360°

  arc QS +75° +190° = 360°

  arc SQ = 95° . . . . . . . . . . . . subtract 265° from both sides

The Side-Angle-Side rule is the foundation for this query. The correct response is therefore option A, since ABC=DEF cannot be inferred from the additional statement that AB=EF.

According to this rule, the corresponding two angles of one triangle are congruent with the two angles of the other triangle. The side-angle-side postulate is the only congruence rule that can be applied as a result.

Here,

A=D and C=F in triangle ABC and triangle DEF.

We must choose a statement that prevents you from deducing that triangle ABC = triangle DEF.

The correct response is therefore option A, since ABC=DEF cannot be inferred from the additional statement that AB=EF.

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Answer:

80

Step-by-step explanation:

Change 40% to a decimal by moving the decimal 2 places left or divide 40 by 100. Write an equation.

\(.4p = 32\)

divide both sides by .4

\(p = 80\)

Answer:

10

Step-by-step explanation:

the constant term in the expression is 10

we have the sequence

1,790 2,555 3,320 4,085 4,850

so

a1=1,790 ----> first term

a2=2,555

a3=3,320

a4=4,085

a5=4,850

Find out the difference between consecutive terms

a2-a1=2,555-1,790=765

a3-a2=3,320-2,555=765

a4-a3=4,085-3,320=765

a5-a4=4,850-4,085=765

This is an arithmetic sequence

The common difference is d=765

so

we have

d=765

a1=1,790

substitute

An inequality to represent the cost of Jason’s food for the party is

An inequality to represent this situation "Jason knows that he will be buying at least 5 packages of hot dogs" is

The two options for buying wings and hot dogs include the following:

In order to write a system of linear inequalities to describe this situation, we would assign variables to the number of packages of hot dogs and number of packages of wings respectively, and then translate the word problem into algebraic equation as follows:

Since one package of wings costs $7 and Hot dogs cost $5 per package, and he must spend no more than $40, a linear inequality which represents this situation is given by;

7x + 5y ≤ 40

Additionally, since Jason knew he would buy at least 5 packages of hot dogs, a linear inequality which represents this situation is given by;

y ≥ 5

Next, we would use an online graphing calculator to plot the above system of linear inequalities as shown in the graph attached below.

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Option C. The statement that describes the graph of the equation y + 2 ≥ –4(x – 3)2 is a a parabola opening down, with shading above the vertex.

To do this you have to create a graph of the equation as seen in the attachment.

From the attachment we can see that the parabola is shaped downwards while we have the shading to be at the top of the vertex.

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11. Yes, the information provided can be used to conclude that C is on the perpendicular bisector of AB because CE bisects AB.

12. Yes, the information provided can be used to conclude that C is on the perpendicular bisector of AB because C is equidistant from AB.

In Mathematics and Geometry, a perpendicular bisector can be used for bisecting or dividing a line segment exactly into two (2) equal halves, in order to form a right angle with a magnitude of 90° at the point of intersection.

Question 11.

By critically observing the geometric shape, we can logically deduce that the information provided can be used to conclude that C is on the perpendicular bisector of AB because CE bisects AB:

AC ≅ BC

CD ≅ CD

AE ⊥ EC

Question 12.

By critically observing the geometric shape, we can logically deduce that the information provided can be used to conclude that C is on the perpendicular bisector because C is equidistant from line segment AB.

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Answer:

x^2+8x+15

x^2-2x+15

x^2-8x+15

2x^2&10x-28

Answer:

[0.6969, 0.7695]

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \(\pi\), and a confidence level of \(1-\alpha\), we have the following confidence interval of proportions.

\(\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}\)

In which

z is the z-score that has a p-value of \(1 - \frac{\alpha}{2}\).

They randomly survey 401 drivers and find that 294 claim to always buckle up.

This means that \(n = 401, \pi = \frac{294}{401} = 0.7332.

90% confidence level

So \(\alpha = 0.1\), z is the value of Z that has a p-value of \(1 - \frac{0.1}{2} = 0.95\), so \(Z = 1.645\).  

The lower limit of this interval is:

\(\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.7332 - 1.645\sqrt{\frac{0.7332*0.2668}{401}} = 0.6969\)

The upper limit of this interval is:

\(\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.7332 + 1.645\sqrt{\frac{0.7332*0.2668}{401}} = 0.7695\)

The 90% confidence interval for the population proportion that claim to always buckle up is [0.6969, 0.7695]

Answer:

a) p=0.154

b) P(X≤2)=0.019

c) He can argue that the proportion of minority jurors is not representative of the proportion of that minority in the population.

Step-by-step explanation:

a) The proportion can be calculated dividing the number of jurors that are from the minority race by the total number of jurors:

\(p=X/N=2/13=0.154\)

b) We can model this with a binomial random variable, with sample size n=13 and probability of success p=0.47.

The probability of k minority jurors in the sample is:

\(P(x=k)=\dbinom{n}{k}p^k(1-p)^{n-k}=\dbinom{13}{k}\cdot0.47^k\cdot0.53^{13-k}\)

We have to calculate the probability that 2 or less minority jurors. This can be calculated as:

\(P(x\leq2)=P(x=0)+P(x=1)+P(x=2)\\\\\\P(x=0)=\dbinom{13}{0}\cdot0.47^{0}\cdot0.53^{13}=1\cdot1\cdot0.0003=0.000\\\\\\P(x=1)=\dbinom{13}{1}\cdot0.47^{1}\cdot0.53^{12}=13\cdot0.47\cdot0=0.003\\\\\\P(x=2)=\dbinom{13}{2}\cdot0.47^{2}\cdot0.53^{11}=78\cdot0.221\cdot0.001=0.016\\\\\\\\P(x\leq2)=0.000+0.003+0.016\\\\P(x\leq2)=0.019\)

The probability that 2 or less minority jurors is 0.019.

The area of the rhombus, obtained from the dimensions, of the diagonals, found from the trigonometric of sines of the angle can be presented as follows;

Area = 8·√3

The area of a plane figure is the two dimensional space occupied by the figure on a plane.

The measure of the angle ABC, m∠ABC = 60°

The length of the segment AE = 2 units

The diagonals of a rhombus bisect each other at right angles, and the right angles through which they pass, therefore;

BE = ED, m∠AEB = 90°

m∠ABE = 30°

sin(30°) = AE/AB

sin(30°) = 2/AB

AB = 2/(sin(30°)) = 4

AB = 4

BE = √(4² - 2²) = √(12) = 2·√3

Therefore; AC = 2 + 2 = 4

BD = 2·√3 + 2·√3 = 4·√3

The area of a rhombus = (1/2) × The product of the length of the diagonals

Therefore;

Area of the rhombus = (1/2) × (4·√3) × 4 = 8·√3

The area of the rhombus = 8·√3

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Answer:

The answer is 22. Sorry if I am wrong

Answer:

18

Step-by-step explanation:

Let's use x and y

x + y = 42

1/3x = 1/6y + 5

Multiply by 3 on both sides

x = 1/2y + 15

SUBSTITUTE X

1/2y + 15 + y = 42

Combine the two ys

1 1/2y + 15 = 42

minus 15 on both sides

1 1/2y = 27

y = 18

Now, find x by substituting y

x + y = 42

x + 18 = 42

x = 24

X is the greater number, y is the smaller number.

The smaller number is 18

Answer:

about 0.52 of the field

30=30 -75=80 = 50 near 52

Step-by-step explanation:

about 0.52 of the field

about 0.64 of the field

about 0.71 of the field

about 0.87 of the field

The number we have is:

To write a decimal number in a decimal form, the steps are to write the whole number (in this case nine) followed by "and" and then write the number that is after the decimal point, and finally the name of the place value of the last digit.

Let's start:

we start with the whole number followed by and:

"nine and"

Now, the name of the number after the decimal point, 276 is two hundred seventy-six, so we continue the sentence as follows:

"nine and two hundred seventy-six"

The final step is to look at the place of the last digit, in 9.276, the number 6 is in the thousandths place, so we add this to the sentence:

"nine and two hundred seventy-six thousandths"

Answer:

"nine and two hundred seventy-six thousandths"

Answer:

Step-by-step explanation: