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2 years ago

I need helpppppp asappppp

Mathematics

1 answer:

andrew-mc [135]2 years ago

3 0

Answer:

A. 72cm

Step-by-step explanation:

Figure a is a convex pentagon, a convex pentagon is a pentagon that does not have an internal angle greater than

${180}^{0}$

An easier thing to remember is that it does not have an angle pointing inwards like b, none of its angles/edges point toward the shape/inside

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9/4 x = 8 1/2 what is x

castortr0y [4]

Answer:

$\frac{9}{4} x = 8 \frac{1}{2} \\ \frac{9}{4} x = \frac{17}{2} \\ x = \frac{17}{2} \times \frac{4}{9} \\ x = \frac{34}{9}$

6 0

2 years ago

41 packages are randomly selected from packages received by a parcel service. the sample has a mean weight of 20.6 pounds and a

lina2011 [118]

Using normal distribution $\alpha = 1-0.95=0.05$
critical probability $p^{*} = 1 - \frac{ \alpha }{2}$
critical value for the critical probability is CV = 1.96
standard error $SE = \frac{3.2}{ \sqrt{41} } = 0.5$
margin of error = CV*SE = 1.96 * 0.5 = 0.98
95% confidence interval is between μ + 0.98 and μ - 0.98, which is (19.62, 21.58)

6 0

2 years ago

A car can travel 135 miles with 5 gallons of gasoline. At this rate, how much gallons of gasoline the car needs to travel 675 mi

labwork [276]

Answer:

25 gallons

Step-by-step explanation:

Given

135 miles to 5 gallons

Required

Determine the number of gallons for 675 miles

From the question, number of miles is directly proportional to number of gallons:

So, we have:

$135\ miles = 5\ gallons$

and

$675\ miles = x$

Where x represents the number of gallons for 675 miles

Cross Multiply:

$135 * x = 675 * 5$

$135x = 3375$

Make x the subject

$x = 3375/135$

$x = 25$

Hence, the car needs 25 gallons

4 0

2 years ago

A bag of candy has a guaranteed ratio of 4:3 caramels to toffee. If a bag has 21 toffees in it, how many caramels are in the bag

olga_2 [115]

Answer:

28 caramels

Step-by-step explanation:

Since the ratio is 4:3 caramel to toffee, that means if there is 21 toffees you have to divide by 3 to get 7. So for the caramel, you multiply 4 x 7 = 28

Hopefully, that helped, and have a great day!

8 0

3 years ago

Just number 2 please i’ve tried many times... i need an equation and the answer :)

Triss [41]

Keller collected $62.48 and Izzy collected $47.83 and J collected $19.98

Step-by-step explanation:

Step 1; Assume that J collected $x, Keller collected $y and Izzy collected $z. All three combined collected $125.95, so

x + y + z = 125.95, take this as equation 1.

From the given data, the following equations can be formed.

y = 42.50 + x or x = y - 42.50 take this as equation 2 and

y = 15 + z, take this as equation 3.

Step 2; Now we must determine x and y in terms of z, so that equation 1 can be solved (the equations can be in terms of any term x, y or z.)

Rearranging equation 2 and 3,

we get 15 + z so x = y - 42.50, y = x = 15 + z - 42.50, take this as equation 4,

If we substitute equations 4, 2 in 1, we get

(15 + z - 42.50) + (15 + z) + z = 125.95,

3z - 12.5 = 129.95,

3z = 142.45, so z = 47.833.

Substitute z = 47.833 in equation 3.

y = 15 + 47.8333 = 62.4833.

Substitute y = 62.4833 in equation 2,

x = 62.4833 - 42.50 = 19.9833.

Rounding of the values of x,y, and z to nearest hundredth we get

x = $19.98, y = $62.48 and z = $47.48.

7 0

3 years ago