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anastassius [24]
2 years ago
13

7th-grade math help me, please :(

Mathematics
2 answers:
IgorC [24]2 years ago
7 0

Answer:

71 remainder 80

Step-by-step explanation:

\frac{28480}{400}=71\:remainder\:80\\\\\frac{28480}{400}=71\frac{80}{400}\\

brilliants [131]2 years ago
4 0

Answer: 71 R 80

Step-by-step explanation:

400*71=28400

28480-28400=R

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Use interval notation to describe.<br><br> John is at least 26 years old.
andrezito [222]
John= greater than or equal to 26 (a >26 with a line under the symbol)
5 0
3 years ago
Can you help me? Please explain how you got it!
julia-pushkina [17]

Answer:

B.

Step-by-step explanation:

First we must find the x and y intercepts for y = -2x - 4. The y-intercept is -4, since it is b in y = mx + b, but you can also find it by plugging in zero for x:

y = -2(0) - 4 = 0 -4=-4

The x-intercept is found by plugging in zero for y:

0=-2x-4

0+4=-2x-4+4

4=-2x

\frac{4}{-2}=\frac{-2x}{-2}

-2=x

The graph with an x-intercept of -2 and a y-intercept of -4 is C. Also, less than inequalities have the shading underneath the line, so we definitely know C is the answer.

4 0
3 years ago
Todos os números pares​
solniwko [45]

Answer:

en que te ayudo

Step-by-step explanation:

TIENES TAREA

5 0
3 years ago
What number is d in 5d-7= -13?
Andru [333]
5d - 7 = -13
5d = -13 + 7
5d = -6
d = -6/5
3 0
3 years ago
An English professor assigns letter grades on a test according to the following scheme. A: Top 15% of scores B: Scores below the
lisabon 2012 [21]

Answer:

59 to 66

Step-by-step explanation:

Mean test scores = u = 74.2

Standard Deviation = \sigma = 9.6

According to the given data, following is the range of grades:

Grade A: 85% to 100%

Grade B: 55% to 85%

Grade C: 19% to 55%

Grade D: 6% to 19%

Grade F: 0% to 6%

So, the grade D will be given to the students from 6% to 19% scores. We can convert these percentages to numerical limits using the z scores. First we need to to identify the corresponding z scores of these limits.

6% to 19% in decimal form would be 0.06 to 0.19. Corresponding z score for  0.06 is -1.56 and that for 0.19 is -0.88 (From the z table)

The formula for z score is:

z=\frac{x-u}{\sigma}

For z = -1.56, we get:

-1.56=\frac{x-74.2}{9.6}\\\\ x = 59

For z = -0.88, we get:

-0.88=\frac{x-74.2}{9.6}\\\\ x = 66

Therefore, a numerical limits for a D grade would be from 59 to 66 (rounded to nearest whole numbers)

7 0
3 years ago
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