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salantis [7]
3 years ago
5

Consider a graph of the equation y = x + 6. What is the y-intercept?

Mathematics
1 answer:
Crank3 years ago
7 0
Y=mx+b

m= slope ,
b= y-intercept

so if y= x+6

b = 6 , y intercept is 6
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An economist believes that interest rates for thirty-year fixed-rate mortgage loans are decreasing. To investigate this further,
Contact [7]

Answer:

The null hypothesis is H_0: p = 0.22

The alternate hypothesis is H_1: p < 0.22

Step-by-step explanation:

To investigate this further, the economist would like to test the claim that the percent of thirty-year fixed-rate mortgage loans that have a 4.75 percent interest rate is less than 22%.

At the null hypothesis, we test that the proportion is of 22%, that is:

H_0: p = 0.22

At the alternate hypothesis, we test that the proportion is less than 22%, that is:

H_1: p < 0.22

7 0
3 years ago
What polynomial identity should be used to prove that 35 = 8 + 27
Julli [10]

Answer:

Sum of cubes identity should be used to prove 35 =3+27

Step-by-step explanation:

Prove that : 35 = 8 +27

Polynomial identities are just equations that are true, but identities are particularly useful for showing the relationship between two apparently unrelated expressions.

Sum of the cubes identity:

a^3+b^3=(a+b)(a^2-ab+b^2)

Take RHS

8+ 27

We can write 8 as 2 \times 2 \times 2 = 2^3 and 27 as 3 \times 3 \times 3 = 3^3.

then;

8+27 = 2^3+3^3

Now, use the sum of cubes identity;

here a =2 and b = 3

2^3+3^3 = (2+3)(2^2-2\cdot 3+3^2)

or

2^3+3^3 = (5)(4-6+9) = 5 \cdot 7 = 35 = LHS    proved!

therefore, the Sum of cubes polynomial identity should be used to prove that 35 = 8 +27

4 0
3 years ago
Read 2 more answers
Δ HFM- Δ PST What is the perimeter of triangle PST? Enter your answer in the box.
fgiga [73]

Step-by-step explanation:

\triangle HFM \sim \triangle PST... (Given) \\\\\therefore   \frac{HF}{PS}  =  \frac{FM}{ST}  =  \frac{HM}{PT}...(csst) \\  \\ \therefore   \frac{30}{PS}  =  \frac{35}{ST}  =  \frac{45}{9}\\  \\ \therefore   \frac{30}{PS}  =  \frac{35}{ST}  =  \frac{5}{1} \\  \\ \therefore  \frac{30}{PS}  =  \frac{5}{1} \\  \\ \therefore PS =  \frac{30}{5} \\  \\\boxed{ \therefore PS =  6 }\\  \\  \because \: \frac{35}{ST}  =  \frac{5}{1} \\  \\  \therefore \: ST = \frac{35}{5}  \\  \\    \boxed{\therefore \: ST = 7} \\  \\ perimeter \: of \: \triangle PST  \\ = 9 + 7 + 6 \\  = 22 \: units

4 0
3 years ago
David is 4 times older than Adan. Adan is 2 times older than julio. Julio is 12, how old is David?
dem82 [27]
12 x 2 = 24 (Julio), 24 x 4 = 96 (David).
3 0
3 years ago
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If the are 5 buses and the quatation amount is R8,100 how much will each person pay ​
Nina [5.8K]

Answer:

R1620

Step-by-step explanation:

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1620×2=3240

1620×3=4860

1620×4=6480

1620×5=8100

5 0
3 years ago
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