PLS HELP!!!
Solve.
2x-y+2z=-6
-3y+z=-2
2x-3z+4

Answer:

3(x+13)

Step-by-step explanation:

use the distributive property to multiply -3 by

3x -5

12x -9x + 15 + 24

then

combine 12x and -9x to get 3

add 15 + 24 to get 39

If our cells couldn't control what crossed their membranes, either no molecules would make it across, or they'd be travelling willy-nilly and the internal environment would always be in flux.

The percent increase in his bill from May to July is 32.29%.

Percentage can be described as a fraction out of an amount that is usually expressed as a number out of hundred. Percentages are a measure of frequency. The sign used to represent percentages is %.

The percent increase in his bill from May to July = (bill in July / bill in May)^(1/number of months) - 1

(136.50 / 78)^(1/2) - 1 = 32.29%

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the speed of the Cheetah in feet per hour will be 369600 feet per hour when the speed if 70 miles per hour.

Speed of the Cheetah = 70 miles / hour

1 mile = 5280 feet

Now, we will convert 70 miles into feet.

For this, we will use the operation of multiplication.

We will multiply 5280 to 70 to convert the miles into feet.

So, the speed of the Cheetah will become:

Speed of the Cheetah = 5280 × 70 / hour.

Speed of the Cheetah = 369600 feet / hour.

Therefore, we get that, the speed of the Cheetah in feet per hour will be 369600 feet per hour when the speed if 70 miles per hour.

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Answer:

f'(x) = 2.x.tan(x) + x²/cos²(x)

Step-by-step explanation:

f(x) = x².tan(x)

=> f'(x) = (x²)' . tan(x) + x². (tan(x))'

= 2x.tan(x) + x² . 1/cos²(x)

=> f'(x) = 2.x.tan(x) + x²/cos²(x)

In expression form, 8(99) is 8 ( 100 - 1 ) = 792, by basic algebra.

Numbers, variables, constants, expressions, equations, linear equations, and quadratic equations are all part of the basics of algebra. Additionally, the algebraic expressions contain the basic arithmetic operations of addition, subtraction, multiplication, and division.

Now, Given:

8 x 99

We know 99 = 100 - 1.

Thus, by basic algebra, 8 ( 99) = 8 (100 - 1)

8 ( 100 - 1) = 8(100) - 8(1)

8( 100 - 1) = 800 - 8 = 792.

Hence, In expression form, 8(99) is 8 ( 100 - 1 ) = 792, by basic algebra.

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Answer:

Final answer is 2

Step-by-step explanation:

Answer:

24964

Step-by-step explanation:

hope this works - btw this is not including 2 and 33

Answer:

True

Step-by-step explanation:

the total distance covered by the bus is 41.67 km in 50 minutes.

For first 25 minutes:

Speed of the bus = 40 km / hr.

Time = 25 minutes

Distance = Speed × Time

Distance = 40 km / hr. × 25 / 60 hr.

Distance = 16.67 km

For the next 25 minutes:

Speed of the bus = 60 km / hr.

Time = 25 minutes

Distance = Speed × Time

Distance = 60 km / hr. × 25 / 60 hr.

Distance = 25 km

Total distance covered = 16.67 km + 25 km

Total distance covered = 41.67 km.

Therefore, we get that, the total distance covered by the bus is 41.67 km in 50 minutes.

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Answer:

20 psectacles and scranbled

Answer:

Around 73cm

Step-by-step explanation:

314.16 is the area of the whole circle

shaded is 85/365 (around 23 percent)

Answer:

Two halves make a whole

34 + 24 + (1/2 + 1/2)

34 + 24 + 1

Answer:

x = 18

Step-by-step explanation:

Given:

As "x" learners play all three sports, the Venn diagram should have three overlapping circles labelled soccer (S), rugby (R) and hockey (H).

x play all three sports:  Label the area that's in S, R and H with x.

8 play rugby only:  Label the area that is R only with 8.

36 play soccer only:  Label the area that is S only with 36.

28 play none of these sports:  Place 28 outside the three circles.

34 play soccer and rugby:  Place "34 - x" in the area that's in S and R.

40 play soccer and hockey:  Place "40 - x" in the area that's in S and H.

42 play hockey and rugby:  Place "42 - x" in the area that's in H and R.

72 play hockey

72 is the total for all the sections of H.

⇒ H = 72 - x - (40 - x) - (42 - x)

⇒ H = 72 - x - 40 + x - 42 + x

⇒ H = x - 10

Place "x - 10" in the area that is H only.

The total number of learners is 160.

Therefore, to find x, sum the areas of the Venn diagram and equal to 160:

⇒ 36 + 8 + 28 + 34 - x + x + 40 - x + 42 - x + x - 10 = 160

⇒ 36 + 8 + 28 + 34 + 40 + 42 - 10 - x + x - x - x + x = 160

⇒ 178 - x = 160

⇒ x = 178 - 160

⇒ x = 18

Finally, substitute x = 18 into the Venn diagram.

6 WEEKS

2x + 28 = 4x + 16

x = 6

24 grams per cubic centimeters equals 0.867 pounds per cubic inches

The quantity (x) is given as:

x = 24 grams per cubic centimeters

1 gram equals 0.00220462 pounds

So, we have:

x = 24 * 0.00220462 pounds per cubic centimeters

Evaluate

x = 0.05291088 pounds per cubic centimeters

1 cubic centimeters equals 0.0610237 cubic inches

So, we have

x = 0.05291088 pounds per 0.0610237 cubic inches

Rewrite as

x = 0.05291088/0.0610237 pounds per cubic inches

Evaluate

x =0.867 pounds per cubic inches

Hence, 24 grams per cubic centimeters equals 0.867 pounds per cubic inches

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In the year 2014, the total average credit card debt for a U.S. household was 13,773 dollars.

An expression can be defined as a mathematical equation which is used to show the relationship existing between two or more variables and numerical quantities.

In order to predict the total average credit card debt in 2014, we would determine the number of years (t) from 1995 to 2014 and then substitute the value into the given expression as follows:

Number of years, t = 2014 - 1995

Number of years, t = 19 years.

Substituting the years into the expression, we have;

Total average credit card debt = 417t + 5850

Total average credit card debt = 417(19) + 5850

Total average credit card debt = 7,923 + 5850

Total average credit card debt = $13,773.

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Answer:

56mph

Step-by-step explanation:

i hope this is the answer you were looking for

(a) The distance on the ground represented 2 cm on the map  is 2000 cm.

(b) The distance on the ground represented 7.6 cm on the map  is 7600 cm

It is given that a map has a scale of 1:1000 which means that 1 cm of the map represents 1000 cm on the ground .

i) (a) Using unitary method , we get

1 cm on map is equivalent to = 1000 cm on the ground

 2 cm on map is equivalent to  = 2 × 1000

                                                      = 2000 cm on the ground

(b) Using unitary method , we get

1 cm on map is equivalent to = 1000 cm on the ground

 7.6 cm on map is equivalent to  = 7.6 × 1000

                                                      = 7600 cm on the ground

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ANSWER:

x=61

STEPS FOR SOLVING LINEAR EQUATION :

Subtract 7x from both sides.

Combine 6x and −7x to get −x.

Subtract 59 from both sides.

Subtract 59 from −2 to get −61.

Multiply both sides by −1.

Hope it helps!!!

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Answer:

answer to the question is x=61

Answer:

AB=11.4

CD=24.4

Step-by-step explanation:

Since AD=11x+10.6, then AB+BC+CD = AD.

Hence,

2x+3+21+7x-5=11x+10.6

Combine like terms:

9x+19 = 11x+10.6

Subtract 9x on both sides:

19 = 2x+10.6

Subtract 10.6 on both sides:

2x=8.4

Divide by 2 on both sides:

x=4.2

Since AB=2x+3, AB=11.4

Since CD=7x-5, CD=24.4

Dinesh met his goal of keeping administrative tasks below 10% of his weekly hours in Weeks 2, 3, and 4.

The percentages of administrative tasks are computed by dividing the administrative hours worked by the total hours worked each week.

Percentages are ratios or portions of a variable in the whole number.

               Administrative Hrs     Total Hours Worked  Admin %   Goal Met?

Week 1             4.25                          40 hours              10.625%       No

Week 2            2.57                          40 hours                6.425%       Yes

Week 3            3.83                          40 hours                9.575%       Yes

Week 4            3.40                         40 hours                 8.500%      Yes

Thus, Dinesh met his goal of keeping administrative tasks below 10% of his weekly hours in Weeks 2, 3, and 4.

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               Administrative Hrs     Total Hours Worked  Admin %   Goal Met?

Week 1             4.25                          10 hours

Week 2            2.57                           8 hours  

Week 3            3.83                           8 hours

Week 4            3.40                           8 hours

574 cereal bars will be placed in bags of 10 and bags of 8 by David. The number of bags of 8 is 33 and number of bags of 10 is 31.

Given that,

574 cereal bars will be placed in bags of 10 and bags of 8 by David. Two more bags of eight than bags of ten make up the total.

We have to find how many 10 and 8-bag sets of cereal bars can David fit.

Let us take,

x be number of bags of 8 and y be number of bags of 10.

So, we can write as

8x+10y=574→equation(1)

x=y+2→equation(2)

Taking the x value form equation(2) and putting in equation (1).

We get,

8(y+2)+10y=574

8y+16+10y=574

18y+16=574

18y=574-16

18y=558

y=558/18

y=31

We got y=31 substitute y value in equation(2).

x=31+2

x=33

Therefore, the number of bags of 8 is 33 and number of bags of 10 is 31.

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The first year profit of the local internet provider was $ 22,389.04.

According to the statement, we find that the profit of the company in its second year of operation is 666 % greater than its profit in its previous year, that is, the profit in its second year of operation is 7.66 times the profit in its first year of operation. Then, the missing profit is found by using the following arithmetic expression:

x = 171,500 / 7.66

x = 22,389.04

The first year profit of the local internet provider was $ 22,389.04.

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The attached graph displays a linear function

The graph that completes the question is added as an attachment

On the line of the graph, we have the following equation

y = 2x - 3

The above equation takes the form of a linear equation (i.e. y = mx + c)

This means that the graph displays a linear function

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Graph B displays a

✔ nonlinear function; the rate of change is not constant.

Step-by-step explanation:

We need to know the formula for volume of a sphere to solve this question.The volume of Darragh's balloon when it is fully inflated is 3532.5[tex]cm^{3}[/tex]

A sphere can be called a circle in 3D, for example a ball is a sphere. There can be solid spheres and hollow spheres, a balloon is a hollow sphere because it has air inside it. The volume of a sphere can be calculated irrespective of it being a solid or a hollow sphere. The volume of a sphere is the capacity the sphere has, incase of a balloon the volume of a balloon means it's capacity to hold air in it. The formula for volume of a sphere is

V=[tex]\frac{1}{3}[/tex]π[tex]r^{3}[/tex] where V is the volume, r is the radius of the sphere

In the question it is given that radius of the sphere when fully inflated is 15cm

V=[tex]\frac{1}{3}[/tex]×3.14×15×15×15=3532.5 [tex]cm^{3}[/tex]

Therefore we found the volume of the balloon when fully inflated to be 3532.5[tex]cm^{3}[/tex].

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