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3 years ago

PLEASE HELP!! 8TH/9TH GRADE MATH!!

Mathematics

2 answers:

a_sh-v [17]3 years ago

7 0

B 112 m/s; it represents the average speed of the object between 3 seconds and 5 seconds

Yuliya22 [10]3 years ago

3 0

(350-126)/(5-3)=112m/s

This is the average speed in the time from 3 to 5 seconds...

dd/dt 98,126,154
d2d/dt2 28,28

She actually had a constant acceleration over the entire time period.

The function for that table is:

d(t)=14t^2

Her actual velocity at any point is v(t)=28t (you can see that if you take the mid point of the interval, 4s, you will get the average velocity found earlier)

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Write a linear function f withe the values f (10) = 5 and f (2) = -3

MakcuM [25]

Answer:

(a) $f(x)=\frac{1}{2}x$

(b) $f(x)=-\frac{3}{2}x$

Step-by-step explanation:

8 0

3 years ago

Solve for X<br> Please walk me through the steps, I understand most of it I just forgot how to do it

nadya68 [22]

Answer:

x=8

Step-by-step explanation:

first you need to find the unknown corner so you do 180-71= 109

then find the interior angle degree (n-2)*180 (n=number of sides) so (4-2)*180=2(180)=360

then set everything equal to 360:

10x+6+13x-2+8x-1+109=360

(combine like terms)

31x+112=360

(subtract 112 form both sides)

31x=248

(divide both sides by 31)

x=8

8 0

3 years ago

Franco played computer chess for 3 hours. Lian played computer chess for 150 minutes. Compare the times spent playing computer c

goldenfox [79]

Franco played for 30 minutes longer than Lian.

3 0

3 years ago

Read 2 more answers

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shtirl [24]

Answer:

Step-by-step explanation:

Figure (1)

x° = 107° [Vertically opposite angles]

Since, vertical angles are equal in measure.

Figure (2)

x + 71° = 90° [Given, complementary angles]

x = 90° - 71°

x = 19°

Figure (3)

x + 21° = 180° [Given as supplementary angles]

x = 180° - 21°

x = 159°

Figure (4)

x = 129° [Vertical angles]

Figure (5)

x° = 90° [Given]

z° + 34° = 90°

z° = 90° - 34°

z° = 56°

Since, x° + y° + z° = 180° [Linear angles]

90° + y° + 56° = 180°

y° + 146° = 180°

y° = 180° - 146°

y° = 34°

7 0

3 years ago

The low temperature for a January day in Atlanta, GA was 8°C. On the same day, the low temperature in Chicago was -4°C and in Ph

nordsb [41]

The correct answer is B.

With negative numbers, the "smaller" the number looks the bigger it is.

-2 is greater than -4.

Positive numbers are greater than negative numbers so we have:

8 > -2 > -4

5 0

3 years ago

Read 2 more answers