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2 years ago

3 feet + 7 inches = ___ inches

Mathematics

2 answers:

forsale [732]2 years ago

5 0

Answer:

because when you plus 3+7 is 10

sashaice [31]2 years ago

5 0

There are 12 inches in one foot
12 inches x 3 feet = 36 inches
36 + 7 = 41 inches
Answer: 41 inches

You might be interested in

The output of a function is 5 more than 2 times the input. Find the input when the output is 17.

Tanya [424]

Answer:

The input when the output is 17 is x=6.

Step-by-step explanation:

Functions

Assume the input is called x and the output is the function f(x). Two times the input is 2x. 5 more than that is 2x+5.

Knowing the output of the function is 5 more than 2 times the input, we can write the function as:

f(x)=2x+5

Now find the input x when the output is 17:

17=2x+5

Swap sides of the equation:

2x+5=17

Subtract 5:

2x=17-5=12

Divide by 2:

x=12/6=6

The input when the output is 17 is x=6.

7 0

3 years ago

Write the equation of the linear relationship in slope-intercept form, using decimals as needed.

Mazyrski [523]

Answer:

y=5

92.5-87.5=5

77.5+5=82.5

4 0

3 years ago

I need help on this question plz

11Alexandr11 [23.1K]

Line of symmetry is the line which cuts the figure into two same halves

or we can say that which passes through the figure such that it makes one half the mirror image of the other half

So we can see from the figure that y=-2 is the line which cuts the figure in to equal halves

y=-2

Third option

6 0

3 years ago

A complex number z=a+bi had an absolute value of 3.28. What could the values of a and b be ? A.a=1.5,b=1.7 C.a=1.7,b=2.8

Levart [38]

The given complex number is ⇒ z = a + b i
The absolute value of z = √( a² + b² ) = 3.28
So, we will check which of the options will give 3.28

( A) IF ⇒⇒ a=1.5 and b=1.7

∴ √( a² + b² ) = √( 1.5² + 1.7²) = √5.14 ≈ 2.27

===================================

(B) IF ⇒⇒ a=1.5 and b=3.3

∴ √( a² + b² ) = √(1.5² + 3.3²) = √13.14 ≈ 3.62

====================================

(C) IF ⇒⇒ a=1.7 and b=2.8

∴ √( a² + b² ) = √(1.7² + 2.8²) = √10.73 ≈ 3.28

====================================

(D) IF ⇒⇒ a=2.8 and b=3.3

∴ √( a² + b² ) = √(2.8² + 3.3²) = √18.73 ≈ 4.33
=====================================
So, the correct answer is option (C) a=1.7,b=2.8

4 0

3 years ago

Consider the following hypothesis test: H0: LaTeX: \mu_1-\mu_2=0μ 1 − μ 2 = 0 Ha: LaTeX: \mu_1-\mu_2\ne0μ 1 − μ 2 ≠ 0 The follow

Pavel [41]

Answer:

$z=\frac{104-\bar 106}{\sqrt{\frac{8.4^2}{80}+\frac{7.6^2}{70}}}}=-1.53$

Step-by-step explanation:

Data given and notation

$\bar X_{1}=104$ represent the mean for the sample 1

$\bar X_{2}=106$ represent the mean for the sample 2

$\sigma_{1} =8.4$ represent the population standard deviation for the sample 1

$\sigma_{2}=7.6$ represent the population standard deviation for the sample 2

$n_{1}=80$ sample size for the group 1

$n_{2}=70$ sample size for the group 2

z would represent the statistic (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if the means for the two groups are the same, the system of hypothesis would be:

H0: $\mu_{1}-\mu_{2} =0$

H1: $\mu_{1} -\mu_{2} \neq 0$

If we analyze the size for the samples both are greater than 30 and we know the population deviations so for this case is better apply a z test to compare means, and the statistic is given by:

$z=\frac{\bar X_{1}-\bar X_{2}}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}}$ (1)

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

Calculate the statistic

First we need to calculate the mean and deviation for each sample, after apply the formulas (2) and (3) we got the following results:

And with this we can replace in formula (1) like this:

$z=\frac{104-\bar 106}{\sqrt{\frac{8.4^2}{80}+\frac{7.6^2}{70}}}}=-1.53$

7 0

3 years ago