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Karo-lina-s [1.5K]
3 years ago
10

Factor the trinomial below.

Mathematics
1 answer:
ivann1987 [24]3 years ago
6 0
Answer: Choice C. (x-7)(x-8)

-------------------------------------------------------

Find two numbers that...
* Multiply to 56 (last term)
* Add to -15 (middle coefficient)

Those two numbers are -7 and -8. So that's why x^2-15x+56 factors to (x-7)(x-8)
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my question is the square root of a negative number has a solution in the numeric field of the real ?
nydimaria [60]
Could you upload a pic of your problem?
5 0
3 years ago
4 men and 6 boys can finish a piece work in 5 days while 3 men and 4 boys can finish it in 7 days. find the time taken by 1 man
Anon25 [30]

Answer:

Number of days taken by 1 man alone and 1 boy alone are 35 days and 70 days respectively.

Step-by-step explanation:

Let, the work completed by 1 man in 1 day = x and the work completed by 1 boy in 1 day = y.

So, 4 men and 6 boy's 1 day work is \frac{4}{x} and \frac{6}{y}

And, 3 men and 4 boy's 1 day work is \frac{3}{x} and \frac{4}{y}

Since, 4 men and 6 boys complete the work in 5 days and 3 men and 4 boys complete the work in 7 days.

So, we have,

\frac{4}{x}+\frac{6}{y}=\frac{1}{5}

\frac{3}{x}+\frac{4}{y}=\frac{1}{7}

Let, u=\frac{1}{x} and v=\frac{1}{y}

So, the equations are,

4u+6v=\frac{1}{5}  ................(1)

3u+4v=\frac{1}{7}  ................(2)

Multiply (1) by 3 and (2) by 4 and subtract the equations, we get,

2v=\frac{1}{35} i.e. v=\frac{1}{70} i.e. \frac{1}{y}=\frac{1}{70} i.e. y = 70.

Substitute value of 'v' in (1) gives,

4u+\frac{6}{70}=\frac{1}{5} i.e. 4u=\frac{-6}{70}+\frac{1}{5} i.e. 4u=\frac{8}{70} i.e. u=\frac{8}{70\times 4} i.e. u=\frac{1}{35} i.e. \frac{1}{x}=\frac{1}{35} i.e. x = 35

So, the number of days taken by 1 men alone and 1 boy alone are 35 days and 70 days respectively.

4 0
4 years ago
Basha's favorite board game has a spinner with nine congruent sections. The spinner has 2 red sections, 3 blue sections, and 4 g
kumpel [21]

Answer:

2/27

Step-by-step explanation:

Step one:

given data

Sample space

2 red sections,

3 blue sections, and

4 green sections

Sample size

2+3+4= 9

Required

The probability of Basha spinning a red on her first spin and a blue on her second spin

Step two:

On the first spin, spinning a red= 2/9

On the second spini, spinning a blue= 3/9= 1/3

Hence, The probability of Basha spinning a red on her first spin and a blue on her second spin= 2/9*1/3= 2/27

5 0
3 years ago
What is the answer to -1x3+4
Sindrei [870]

Answer:

Your answer is 1, look below please

Step-by-step explanation:

ASSUMING that the x is a variable your equation is -1x=3+4 which would be...

-1x=7, then divide by -1 which gives us -7

7 0
3 years ago
Read 2 more answers
I need help plz, percents
professor190 [17]
14.
\frac{32}{128} = \frac{x}{100} \\ x = \frac{32 \times 100}{128} \\ x = 25
15.
\frac{3}{36} = \frac{x}{100} \\ x = 8.3
16.
\frac{30}{100} = \frac{23.7}{x} \\ x = \frac{23.7 \times 100}{30} \\ x = 79
17.
\frac{7.5}{100} = \frac{12}{x} \\ x = \frac{12 \times 100}{7.5} \\ x = 160


please mark as brainliest answer.
5 0
4 years ago
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