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stira [4]
3 years ago
11

Looking back on previous tests and quiz questions can benefit you in determining what to study because they

Mathematics
2 answers:
dexar [7]3 years ago
5 0

answer b because it most likely that it wont be used word for word on another test


Artyom0805 [142]3 years ago
4 0

Answer: (b) Provide hints on what the teacher thinks is important

Explanation: Clearly, the teacher selects what to ask in the tests, and it is plausible to think that (s)he will select problems that they deem important.

The teacher will know that students look at past tests, and so they will tend to change the wording and values in the tests to prevent plagiarism, so (a) is not the right choice.

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I need help with the work of the math
8_murik_8 [283]

Answer:

13) (-2,-3)  14) (7,-4)   15) (-8,7)

Step-by-step explanation:

13) y=8x+13

   -4x-5y=23

use substitution

-4x-5(8x+13)=23

distribute -5 in the parenthesis

-4x-40x-65=23

-44x-65=23

add 65 on both sides

-44x=88

divide both sides by -44

x=-2

for y...

y=8(-2)+13

y=-16+13

y=-3

answer is (-2,-3)

14) -3x-y=-17

y=-4x+24

use substitution

-3x-1(-4x+24)=-17

distribute the -2 in the parenthesis

-3x+4x-24=-17

x-24=-17

add 24 on both sides

x=7

for y...

y=-4(7)+24

y=-28+24

y=-4

answer is (7,-4)

15)5x+4y=-12

   y=-2x-9

use substitution

5x+4(-2x-9)=-12

distribute 4 in the parenthesis

5x-8x-36=-12

-3x-36=-12

add 36 on both sides

-3x=24

divide both sides by -3

x=-8

for y...

y=-2(-8)-9

y=16-9

y=7

answer is (-8,7)

7 0
3 years ago
Answer ASAP BRAINLIEST 20 POINTS
AleksandrR [38]

Answer:

1/2x plus -2

Step-by-step explanation:

5 0
3 years ago
What is the maximum height of the projectile? 82 feet 190 feet 226 feet 250 feet.
Contact [7]

The maximum height of the projectile will be 226 feet that is, as per question, the option c.

A quadratic equation , y = ax²+bx+c  (equation 1)

given, axis of symmetry is

x = \frac{b}{2a}

As per the question:

The path of the projectile is modeled using the equation :

h(t) = -16t²+48t+190  (equation 2)

h(t) = height after t time.

comparing equation 1 and equation 2, we get

a = -16 and b = 48

further, t = \frac{48}{2(-16)}

= \frac{48}{32}

= 1.5sec

Substituting the found value in equation 2, we get

h(1.5) = -16(1.5)²+48(1.5)+190

h(1.5) = -36+72+190

h(1.5) = 226ft.

Thus, the maximum height of the projectile at 1.5 sec is, 226 feet.

Note that the full question is:

A projectile with an initial velocity of 48 feet per second is launched from a building 190 feet tall. The path of the projectile is modeled using the equation h(t) = –16t2 + 48t + 190.

What is the maximum height of the projectile?

A. 82 feet

B. 190 feet

C. 226 feet

D. 250 feet

To learn more about velocity: brainly.com/question/25749514

#SPJ4

4 0
1 year ago
ITS AN EMERGENCY!!! helppppppp​
alisha [4.7K]

Answer:

wHaT Is ThHaT?

Step-by-step explanation:

6 0
3 years ago
The second term is 5 the fourth term is 12 and the seventh term is 22. 5 what is the first term?
Naddik [55]

Answer:

3.5

Step-by-step explanation:

each jump will increase 3.5

order: 2   3   4    5    6     7

num:   5 8.5 12 15.8 19 22.5

7 0
2 years ago
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