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Eva8 [605]
3 years ago
6

If x=-1, then which of the following equations makes a true statement? A. 4x+9= 20 B. -4x-5=-15 C. -3x+15=-22

Mathematics
2 answers:
AveGali [126]3 years ago
8 0

Answer:

The only thing I can think of is that you miss-typed out the question. None of these work :/

MariettaO [177]3 years ago
7 0

Answer:

I do not think any will work...

Step-by-step explanation:

4(x)+9=20   4(-1)+9=20     -4+9=20    5=20   NO

-4(x)-5=-15   -4(-1)-5=-15     4-5=-15     -1=-15   NO

-3x+15=-22   -3(-1)+15=-22      3+15=-22    18=-22  NO

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If you ungroup 5,000 from 2,896 how do you explain the place value of 49910 to 5,000
katovenus [111]
You get all of the numbers and turn them too zeros except the first one
3 0
3 years ago
In an examination 80% students passed. if 15 less have appeared and 10 less have passed, the ratio of passers to failures would
Nina [5.8K]

Answer:

60 students passed, and 75 appeared in examination.

Step-by-step explanation:

Let's say s is the total number of students and p is the number of students who passed.

80% of the students passed, so:

0.8 s = p

If there were 10 less passers, and 15 less students (5 less failures), then the ratio of passers to failures would be 5/1.

(p − 10) / (s − p − 5) = 5 / 1

Simplify the second equation:

p − 10 = 5 (s − p − 5)

p − 10 = 5s − 5p − 25

6p = 5s − 15

Substitute the first equation.

6 (0.8 s) = 5s − 15

4.8 s = 5s − 15

0.2 s = 15

s = 75

p = 0.8 s

p = 60

60 students passed, and 75 appeared in examination.

5 0
3 years ago
What and which at time are the maximum and minimum speeds in this function?
Svetach [21]

Answer:

the maximum is 12000 and the minimum is 0

Step-by-step explanation:

sorry if this doesn't answer your question

4 0
3 years ago
Read 2 more answers
NEED HELP ASAP
Viefleur [7K]

Answer:

2625 cubic meters

Step-by-step explanation:

the volume of a rectangle is V = length x width x height (depth in this case)

so, 50m x 30m x 1.75m = 2625m^3

7 0
3 years ago
Read 2 more answers
DeSean is sorting his toy car collection. ⅔ of the cars are sports cars. ¼ of the remaining toys are pick up trucks. All of the
user100 [1]

Answer:

Fraction of fire trucks = \frac{1}{4}

Total number of toy cars = 16

Step-by-step explanation:

Fraction of sports car = \frac{2}{3}

Fraction of remaining cars =1-\frac{2}{3}=\frac{3-2}{3} =\frac{1}{3}

So,

Fraction of pick up cars = \frac{1}{4}(\frac{1}{3})=\frac{1}{12}

Therefore,

Fraction of fire trucks = \frac{1}{3}-\frac{1}{12}=\frac{4-1}{12}=\frac{3}{12}=\frac{1}{4}

That is Number of fire trucks = \frac{1}{4} ( Total number of toy cars )

Number of fire trucks = 4

Total number of toy cars = 4(4)=16

3 0
3 years ago
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