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Gelneren [198K]
2 years ago
10

Seven times the sum of a number and 4 equals 8.

Mathematics
2 answers:
Ksju [112]2 years ago
6 0

Answer:

7*(n+4) =8

Step-by-step explanation:

seven times the sum

7*(

of an number and 4

7*( n+4)

equal 8

7*(n+4) =8

MissTica2 years ago
5 0

Answer: -20/7

Step-by-step explanation:

Seven times the sum of a number and 4 equals 8

Let the number be k

Sum of a number and 4

I.e

K+4.......(1)

Seven times the sum gives

7(k+4)=8

Open the bracket

7k+28=8

7k=8-28

7k= -20

K= -20/7

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What is 5 1/2 * 2 1/3?
storchak [24]

The solution of the given expression will be 12\dfrac{5}{6}

<h3>What is an expression?</h3>

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition,substraction, multiplication and division.

The given expression will be calculated as:-

= 5\dfrac{1}{2}\times 2\dfrac{1}{3}\\\\\\=\dfrac{11}{2}\times \dfrac{7}{3}\\\\\\=\dfrac{77}{6}\\\\\\=12\dfrac{5}{6}

Hence the solution of the given expression will be 12\dfrac{5}{6}

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5 0
1 year ago
Solve the triangle.
saw5 [17]

Answer:

Step-by-step explanation:

because <u>c</u> is shorter than<u> a</u> we know C is a smaller angle than A

so the first choice is out.

use the law of cosines to find b

b^{2} = a^{2} +c^{2} -2*a*c*cos(B)

b^{2} =1681+400-1326.787871

b^{2}= 754.21219

b= \sqrt{754.21219}

b= 27.46292

so the last choice looks good

5 0
2 years ago
Please try to help if you can.
PolarNik [594]

The equation of the sinusoidal function is y = -2sin(x + 1.5) - 3

<h3>The sinusoidal function</h3>

The minimum and the maximum of the function are

  • Minimum = -1
  • Maximum = -5

The amplitude (A) is calculated as:

A = 0.5 * (Maximum - Minimum)

So, we have:

A = 0.5 * (-5 + 1)

A = -2

The vertical shift (d) is calculated as:

d = 0.5 * (Maximum + Minimum)

So, we have:

d = 0.5 * (-5 - 1)

d = -3

The period (P) is calculated as:

P = 2π/B

From the graph,

B = 1

So, we have:

P = 2π/1

P = 2π

So, the amplitude is -2 and the period is 2π.

<h3>The equation of the sine function</h3>

In (a), we have:

A = -2

B = 1

d = -3

A sine function is represented as:

y = A sin(Bx + C) + D

So, we have:

y = -2sin(x + C) - 3

The graph passes through the point (0, -5)

So, we have

-5 = -2sin(0 + C) - 3

Solve for C, we have

C = 1.5

So, we have:

y = -2sin(x + 1.5) - 3

Hence, the equation of the sinusoidal function is y = -2sin(x + 1.5) - 3

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7 0
1 year ago
Suppose that in a random sample of size 200, standard deviation of the sampling distribution of the sample mean 0.08. researcher
sertanlavr [38]

Answer:

400

Step-by-step explanation:

The computation of the sample size needed is shown below:

Since at the sample size of 200 there is a standard deviation of 0.08

But when the standard deviation is 0.04 so the sample size is 400

As sample standard deviation would be inversely proportional to the square root of the sample size

7 0
3 years ago
If ∠x= 55, then find the values of a, b, c and d
AnnyKZ [126]

Answer:

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8 0
2 years ago
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