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2 years ago

A model plane is 1/48 the size of the actual plane. If the model plane is 28 inches long, how long is the actual plane?

2 answers:

7 0

First, you would want to wright down on a separate sheet of paper 1\48 and 28 inches. then, you would want to find a common demonaitor and that would be 48 because 1 times 48 equales 48. next you subtract 1/48 and 28/48 witch would be 27/48 and your answer would be the actual plane is 27/48 long

Hoochie [10]2 years ago

3 0

I am not so sure because i have not studied this yet i am very sorry

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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!<br><br> What is [100(−4)^n-1} equal to?

nikklg [1K]

Answer: -5100

<u>Step-by-step explanation:</u>

$\sum^4_1[100(-4)^{n-1}]\qquad \rightarrow \qquad a_1=100\ \text{and r = -4}\\\\\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\\\\\S_4=\dfrac{100(1-(-4)^4)}{1-(-4)}\\\\\\.\quad=\dfrac{100(1-256)}{1+4}\\\\\\.\quad=\dfrac{100(-255)}{5}\\\\.\quad=20(-255)\\\\.\quad=-5100\\$

3 0

2 years ago

Select all of the choices that are equal to (-5) – (-12).

krek1111 [17]

The answer is 7 i’m pretty sure

4 0

2 years ago

Read 2 more answers

Find the height of a right square pyramid that has a rectangular base area of 70 square units and a volume of 140 cubic units.

Lostsunrise [7]

Answer:

B. 6 units

Step-by-step explanation:

$V = {a}^{2} \frac{h}{3} \\ \\ 140 = 70( \frac{h}{3}) \\ \\ 6 = h \\ \\ 140 = 70(2)$

I am joyous to assist you anytime.

5 0

2 years ago

Please help me with these problems

S_A_V [24]

Answer:

1.a=2

2. C x=2 and x=-3

Step-by-step explanation:

The standard form for the quadratic function is

ax^2 +bx+c

so we need to rewrite the function to be in this form

2x^2 -10 = 7x

Subtract 7x from each side

2x^2 -7x-10 = 7x-7x

2x^2 -7x-10 = 0

a =2, b= -7 c=-10

2. The quadratic formula is

-b ± sqrt(b^2 -4ac)

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

2x^2 + 2x=12

Lest get the equation in proper form

2x^2 + 2x-12 = 12-12

2x^2 +2x-12 =0

a=2 b=2 c=-12

Lets substitute what we know

-2 ± sqrt(2^2 -4(2)(-12))

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

2(2)

-2 ± sqrt(4+96)

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

2(2)

-2 ± sqrt(100)

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

-2 ± 10

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

-2 + 10 -2-10

----------- and --------------

4 4

8/4 and -12/4

2 and -3

8 0

2 years ago

As part of a research project on student debt at TWU, a researcher interviewed a sample of 35 students that were chosen at rando

Inga [223]

Answer:

Option a is right

Step-by-step explanation:

Given that as part of a research project on student debt at TWU, a researcher interviewed a sample of 35 students that were chosen at random concerning their monthly credit card balance.

Sample average = 2573

Variance = 4252

Sample size = 35

STd deviation of X = $\sqrt{4252} \\=65.21$

Score of student selected at random X=1700

Corresponding Z score = $\frac{1700-2573}{65.201} \\=-13.38$

Rounding of we get Z score = -13.4

option a is right

6 0

2 years ago