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pochemuha
3 years ago
13

What times what equals 20 but adds up to 19 also ?

Mathematics
1 answer:
ziro4ka [17]3 years ago
7 0
10 + 10 10+9 hope this helps

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Please help i need to check my work
oee [108]

Answer:

{-2, 5}

Step-by-step explanation:

I used a calculator, pls let me know if im incorrect

x^2 − 3x − 10 = 0

Step 1: Factor left side of equation.

(x+2) (x−5) = 0  

Step 2: Set factors equal to 0.

x + 2 = 0 or x − 5 = 0

x = −2 or x = 5  

Those are the steps that the calculator said to do ^

6 0
3 years ago
Claim: The mean pulse rate (in beats per minute, or bpm) of adult males is equal to 69 bpm. For the random sample of 153 adult m
AysviL [449]

Answer:

H_0:\mu=69

H_a:\mu\neq69

Step-by-step explanation:

We know that ,

Null hypothesis(H_0) is a statement that contains the population parameter to represent claim or against claim statement along with = , ≤ and ≥ signs.

Where as Alternative hypothesis(H_a) is also a statement that contains the population parameter but against the null hypothesis . It contains ≠ , < and > signs.

In the given situation, the population parameter is population mean (\mu) .

Claim: The mean pulse rate (in beats per minute, or bpm) of adult males is equal to 69 bpm.

i.e. H_0:\mu=69

and H_a:\mu\neq69    [Against H_0]

4 0
4 years ago
.
Oduvanchick [21]

Answer:

The third one is unbiased because its not specific and it's not involving a group of people or a comparison of things. It's also not specific. It's asking about lowering the expensive sales tax in the city and not to certain people, etc..

Hope it's right:)

3 0
4 years ago
252% of 58 is what number?
AURORKA [14]

Answer:

252 = 22 × 32 × 7;

58 = 2 × 29;

Multiply all the prime factors, by the largest exponents.

Least common multiple:

lcm (252; 58) = 22 × 32 × 7 × 29;

lcm (252; 58) = 22 × 32 × 7 × 29 = 7,308

the numbers have common prime factors

6 0
3 years ago
At what speed in miles per hour will a bicycle travel if the rider can cause the 26-inch diameter wheel to rotate 90 revolutions
Sati [7]
26' wheel @ 90 rpms = 2,340 inches / min   (26 x 90)

2,340 inches / min = 140,400 inches / hour  (2,340 x 60)

140,400 inches / hour = 11,700 feet / hour   (140,400 / 12)

11,700 feet / hour = approx. 2.216 miles / hour   (11,700 / 5,280)
8 0
3 years ago
Read 2 more answers
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