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3 years ago

Need help will give brainliest!!!! answer Part A and B plzzz!!!

Mathematics

1 answer:

jek_recluse [69]3 years ago

4 0

Answer:

Part A. C Part B. D

Step-by-step explanation:

Part A: First, if you know you want to have equal than or more than 78 then you know it goes on the right side of the inequality. Next, you have to pay attention to the inequality and remember it's meaning. !!!Remember!!!!

This: 10<11 means 10 is less than 11, or you can read it as 11 is greater than 10. Use that to choose between C and D.

Part B: This question requires you to solve the inequality and then construct a graph. You can easily take off A and C because you know you already have positive 13 sold and therefore your total will be positive.

So, solve the inequality to find C and reread the question so you remember the goal of this coat drive (remember the sign you used in Part A); once you do that you can choose between B and D.

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The stopping distance of a car is modeled by the function d = 0.05r(r + 2) where d is the stopping distance of the car measured

adell [148]

Answer:

The car was moving approximately at a speed of 37.74 miles per hour.

Step-by-step explanation:

We are given the following in the question:

The stopping distance of a car is given by

$d = 0.05r(r + 2)$

where d is the stopping distance in feet and r is speed of the car in miles per hour.

The stopping distance is 75 feet, we have to find the speed of the car,

Putting d = 75 in the equation, we get,

$75 = 0.05r(r + 2)\\r^2 + 2r = 1500\\r^2 + 2r-1500 = 0\\\\r =\dfrac{-2\pm \sqrt{4-(4)(1)(-1500)}}{2}\\\\r\approx -39.74,37.74$

Thus, the car was moving approximately at a speed of 37.74 miles per hour.

3 0

3 years ago

The radius of circle A is r cm. The radius of circle B is twice the radius of circle A. What difference between the circumferenc

avanturin [10]

9514 1404 393

Answer:

2πr cm

Step-by-step explanation:

The circumference of a circle of radius r is ...

C = 2πr

For a radius of (r cm), the circumference is ...

A = 2π(r cm) = 2πr cm

For a radius of (2r cm), the circumference is ...

B = 2π(2r cm) = 4πr cm

Then the difference between the circumferences is ...

B -A = (4πr cm) -(2πr cm) = 2πr cm . . . . difference in circumference

3 0

3 years ago

On Monday you sent x number of text messages. On Tuesday you sent twice as many. On Wednesday you sent 12 more texts than you se

kykrilka [37]

Answer: Expression represents the number of text messages you sent on Tuesday = 2x

Expression represents the number of text messages you sent on Wednesday = 12+2x

Expression represents the number of text messages you sent on Thursday = x+6

Step-by-step explanation:

Given:

Number of text messages sent on Monday = x

On Tuesday, Number of text messages sent = 2 (Number of messages sent on Monday)

= 2 x

On Wednesday, Number of text messages sent = 12+ (Number of messages sent on Tuesday)

= 12 +2x

On Thursday, Number of text messages sent = $\dfrac12(2x+12)$

= x+6

Expression represents the number of text messages you sent on Tuesday = 2x

Expression represents the number of text messages you sent on Wednesday = 12+2x

Expression represents the number of text messages you sent on Thursday = x+6

5 0

3 years ago

Read 2 more answers

I need help ASAP! It's urgent.. PLISSSSS

Soloha48 [4]

Answer:

hope this helps you

7 0

3 years ago

.21 of what number is 7.98

AlladinOne [14]

.21 as a percentage is 21%
You can divide 7.98 by 21 then multiply by 100 which gives you an answer of 38.

Hope this helps :)

8 0

3 years ago