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Cloud [144]
3 years ago
10

Derek spends $8.50 a day on school breakfasts and lunches. How much does he spend on food in a school week? (Hint: there are 5 d

ays in a school week)
Mathematics
2 answers:
My name is Ann [436]3 years ago
6 0
8.50 x 5= 42.5
you multiply how much he spends in a day to the amount of school days
Anit [1.1K]3 years ago
5 0

Answer:

$42.50

Step-by-step explanation:

$8.50 x 5 days = $42.50

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A ball is 4 feet above the ground when Tyrese throws it into the air. Use the quadratic equation 0=−t2+3t+4 to find how much tim
kompoz [17]

Answer:

Step-by-step explanation:

This quadratic models the parabolic motion equation

h=-at^2+v_{i}t+h_{i}

where h is the height of the object after the motion occurs, a is the pull of gravity, v(i) is the initial vertical velocity of the object, and h(i) is the height from which the object was initially launched.  If we are looking for when the ball hits the ground, h = 0, because the height of an object on the ground has no height at all (or 0 height).  To find the time the object was in the air, factor the quadratic and solve for the values of t.

Two factors of 4 that add up to be 3 and multiply to be 4 are -1 and 4.  So t=-1 and t = 4.  Since we know that time can never be negative, then t = 4 seconds.

4 0
3 years ago
Read 2 more answers
HELP ME PLEASE
Zina [86]

Answer:

π(5²)(13)+⅓π(5²)(12)

Step-by-step explanation:

You can find the volume of the cylinder by:

V=πr²h

which is V1=π(5²)(13)

and the volume of the crooked cone by:

⅓πr²h

which is V2=⅓π(5²)(12)

and you need the volume of the whole shape. you can find by adding V1+V2

3 0
1 year ago
The human resource department at a certain company wants to conduct a survey regarding worker benefits. The department has an al
dezoksy [38]

Answer:

Step-by-step explanation:

Hello!

A systematic sample is a sampling type where, the population units are listed in a certain order, the first unit is randomly chosen from the first k number of units and then the subsequent units are selected in intervals of k. To calculate k, in case you know the population size, you have to divide the population size by the sample size (usually established based on previous information. Remember k is always a whole number.

a) k= pob/n= 4247/40= 106.175 ≅ 106

b) From the 106 individuals you have to randomly select the first unit. Then starting from it the next 39 individuals surveyed will be the +k

Using a random number calculator I've chosen the first individual to be surveyed as number 57 after that you have to add k= 106 to know wich are the next individuals to be sampled:

1) 57                          11) 1117        21) 2177       31) 3237

2) 57 + 106= 163      12) 1223      22) 2283    32) 3343

3) 269                      13) 1329      23) 2389     33) 3449

4) 375                       14) 1435      24) 2495     34) 3555

5) 481                        15) 1541       25) 2601     35) 3661

6) 587                       16) 1647      26) 2707     36) 3767

7) 693                       17) 1753       27) 2813      37) 3873

8) 799                       18) 1859       28) 2919     38) 3979

9) 905                       19) 1965       29) 3025    39) 4085

10) 1011                      20) 2071       30) 3131      40) 4191

I hope it helps!

3 0
3 years ago
Find the value of (6^0 − 7^0) × (6^0 + 7^0)
uysha [10]

Answer:

-13

Step-by-step explanation:

6-7 x 6+7

-1 x 13

-13

6 0
2 years ago
Read 2 more answers
6x+3y= -9<br> find the slope and y-intercept
Sophie [7]

Answer:

Slope: -2

y-intercept: -3 or (0, -3)

Step-by-step explanation:

y = mx + b

    m = slope

    b = y-intercept

6x+3y= -9

3y = -6x - 9

y = -2x - 3

5 0
3 years ago
Read 2 more answers
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