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Inessa [10]
3 years ago
5

2a +5 - 3a -12 please

Mathematics
2 answers:
chubhunter [2.5K]3 years ago
7 0

Answer:

-7-a

Step-by-step explanation:

2a-3a +5-12

-a - 7

or -7-a

Nastasia [14]3 years ago
3 0

Answer:

-a - 7

Step-by-step explanation:

Add like terms to simplify the expression:

2a + 5 - 3a - 12

Add together 2a and -3a:

2a - 3a = -a

Add together 5 and -12:

5 - 12 = -7

Add these together:

-a - 7

So, the simplified expression is -a - 7

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Sam and Jeremy have ages that are consecutive odd integers. The product of their ages is 783, which equation could be used to fi
stepladder [879]
(2x+1)=Jeremy´s age
(2x+3)=Sam´s age.
we suggest this equation:
(2x+1)(2x+3)=783
4x²+6x+2x+3=783
4x²+8x-780=0
x²+2x-195=0

We solve this quadratic equation:
x=[-2⁺₋√(4-4*1*(-195))]/2=(-2⁺₋28)/2

x₁=(-2-28)/2=-15 this solution is not valid.
x₂=(-2+28)/2=13

Jeremy´s age=2x+1=2*13+1=27
Sam´s age=2x+3=2*13+3=29



7 0
3 years ago
What’s the circumference of circles
ale4655 [162]

Answer:

62.83185

Step-by-step explanation:

C=2πr=2·π·10≈62.83185

6 0
2 years ago
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(6×1,000)+(1×100)+(2×10)+(9× 10 1 ​ )+(4× 100 1 ​ )=?
stiv31 [10]

Answer:

11033

Step-by-step explanation:

3 0
2 years ago
In the Pythagorean equation, a and b represent the legs that create the right angle.
Alla [95]
True. A^2 + B^2 = C^2

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5 0
3 years ago
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​claim: the mean pulse rate​ (in beats per​ minute) of adult males is equal to 69 bpm. for a random sample of 140 adult​ males,
zaharov [31]

Answer:

93.19%

Step-by-step explanation:

We have that the mean (m) is equal to 70.4, the standard deviation (sd) 11.1 and the sample size (n) = 140

They ask us for P (x =69)

For this, the first thing is to calculate z, which is given by the following equation:

z = (x - m) / (sd / (n ^ 1/2))

We have all these values, replacing we have:

z = (69 - 70.4) / (11.1 / (140 ^ (1/2)))

z = 1.49

With the normal distribution table (attached), we have that at that value, the probability is:

P (z <1.49) = 0.9319

The probability is 93.19%

8 0
3 years ago
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