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3 years ago

Evalute 2d + 3 when d =8

Mathematics

2 answers:

vlada-n [284]3 years ago

5 0

Answer:

2(8)+3

16+3=19

Step-by-step explanation:

In-s [12.5K]3 years ago

4 0

Answer:

Step-by-step explanation:

replace the d with 8 and it will be 2 times 8 then you add 3 to the 8

2x8= 16

16+3= 19

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You are traveling to Chicago for a job interview. You leave Toledo, Ohio, at 5:45 A.M. and arrive in Elkhart, Indiana, at 8:15 A

baherus [9]

The minimum speed will be calculated as follows:
Time taken from Toledo to Elkhart=(8.15-5.45)=2 1/2 hours
Distance=136 miles
thus the speed between Toledo and Elkhart= 136 miles/2.5=54.4 mph

Distance between Toledo and Chicago is 244 miles
Distance between Elkhart and Chicago=244-136=108 miles
time taken to travel between Elkhart and Chicago assuming that I left Elkhart at exactly 8:15 and reach at 10.30:
=10:30-8:15=2.25 hours
thus the speed will be:
speed=(108)/(2.25)=48 mph
Thus for us to get to Chicago by 10:30 a.m we should drive at 48 mph

4 0

4 years ago

Match the real-world problem to its constant of proportionality.

BabaBlast [244]

Answer:

a. $18.36 for 3 pizzas : k = 6.12

b. $4.17 for 3 pounds of bananas . k = 1.39

c. $16.48 for 4 pounds of potatoes . k = 4.12

d. 2 cups of flour to make 24 cookie . k = 2

Step-by-step explanation:

<u>PROPORTIONALITY:</u>

Two quantities x and y are said to proportional to each other

if for x ∝ y , x = y k.

Here, k i s called the PROPORTIONALITY CONSTANT.

⇒ $x \propto y \implies k = \frac{x}{y}$

Now, for the given quantities:

a. $18.36 for 3 pizzas [box]

Here, $k = \frac{18.36}{3} = 6.12$

So, the proportionality constant is 6.12.

b. $4.17 for 3 pounds of bananas [box]

Here, $k = \frac{4.17}{3} = 1.39$

So, the proportionality constant is 1.39.

c. $16.48 for 4 pounds of potatoes [box]

Here, $k = \frac{16.48}{4} = 4.12$

So, the proportionality constant is 4.12.

d. 2 cups of flour to make 24 cookies

Here, $k = \frac{24}{2} = 12$

So, the proportionality constant is 12

6 0

4 years ago

Q11. Helen invested £6000 for n years in a savings account. She got 3% compound interest each year. At the end of n years Helen

ratelena [41]

Answer: 100/103, 184481/150000

Step-by-step explanation:

6 0

2 years ago

A) A pack of 8 batteries cost £3.99 how much dose each battry cost? ( give your answer in penny ?) _____________________________

joja [24]

£3.99 divided by 8 is £0.49875
Which, changed into pence and rounded up, is 50p.

£2.79 divided by 6 is £0.465
Which, changed into pence and rounded up is 47p.

50p is bigger than 47p

50 subtract 47 is 3p

The second one has the better value for money as it costs 3p less per battery.

5 0

3 years ago

Read 2 more answers

How do you Estimate the Product of Decimals and Whole

PtichkaEL [24]

Answer:

1) 8.5

2) 60

3) 69.3

4) 6.8

5) 3.6

6) 10.5

Step-by-step explanation:

Take out the decimal of the estimated factors and multiply. Count how far to left the decimal is in the factors. In the product, put the decimal as many to the left as it was in the factors. (ex. 6.93 x 42, 6.93 rounds to 6.9, 42 rounds to 40, 69 x 40 = 2,760, move the decimal over one for correct place value, 6.9 x 40 = 276.0 <em>or </em>276)

8 0

3 years ago

Evalute 2d + 3 when d =8 ​

Evalute 2d + 3 when d =8