what is the y-value of the solution to the system of equations shown below? 5x+4y=12 -5x-2y=-16
A. -4
B. -2
C. 2
D. 4​

Answer:

[tex]\frac{7}{26}[/tex]

Step-by-step explanation:

let x be the denominator of the fraction then x - 19 is the numerator , so

[tex]\frac{x-19}{x}[/tex] ← is the original fraction

subtrating 1 from the numerator and adding 1 to the denominator , then

[tex]\frac{x-20}{x+1}[/tex] = [tex]\frac{2}{9}[/tex] ( cross- multiply )

9(x - 20) = 2(x + 1) ← distribute parenthesis on both sides

9x - 180 = 2x + 2 (subtract 2x from both sides )

7x - 180 = 2 ( add 180 to both sides )

7x = 182 ( divide both sides by 7 )

x = 26

Then the original fraction is

[tex]\frac{26-19}{26}[/tex] = [tex]\frac{7}{26}[/tex]

Answer:

the secound triangle shows right angle

Step-by-step explanation:

But the question says it is 91 ⁰ so the question may be wrong

Answer:

None.

Step-by-step explanation:

None of the given triangles are right triangles as for a triangle to be a right angled triangle it should have one angle which is equal to 90°.

The closest one will be the second triangle as it has one angle as 91° but it's NOT a right triangle .

________

Hope it helps ⚜

Answer:

Step-by-step

Let us assume that the third leg is X. So, X^2 + 2^2 = 5^2.X^2 = 25 - 4.X^2 = 21.X = root 21.

a right triangle, hypotenuse=5 cm, one leg=2 cm, the other leg=xApplying the Pythagorean theorem:5^2=2^2+x^2, 25=4+x^2,x^2=25–4=21, x=sqrt(21), x=4,58 cmThe measurement of the other leg is 4,58 cm

Answer:

1. No

2. No

3. Yes

4. No

Answer:9

Step-by-step explanation: 30= 2n + 12

Subtract 1Subtract12 from both sides

Divide both sides by 2

Answer:

Triple the length, height and width

Step-by-step explanation:

Multiply 3x/Cube length, width, and height! (possibly?)

Answer: The correct option is D

Step-by-step explanation:

Correct on edge 2022

Considering the situation described, the p-value for Amy's result is of 0.0203.

At the null hypotheses, it is tested if the mean is not greater than $50,000, that is:

[tex]H_0: \mu \leq 50000[/tex]

At the alternative hypotheses, it is tested if the mean is greater, hence:

[tex]H_1: \mu > \leq 50000[/tex]

We are testing if the mean is greater than a value, hence we have a right-tailed test. Using a right-tailed test with t = 2.06 and 200 - 1 = 199 df, the p-value is of 0.0203.

More can be learned about p-values at https://brainly.com/question/26454209

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Check the picture below.

so the volume will simply be the area of the hexagonal face times the height.

[tex]\textit{area of a regular polygon}\\\\ A=\cfrac{1}{4}ns^2\stackrel{\qquad degrees}{\cot\left( \frac{180}{n} \right)}~~ \begin{cases} n=\stackrel{number~of}{sides}\\ s=\stackrel{length~of}{side}\\[-0.5em] \hrulefill\\ n=6\\ s=12 \end{cases}\implies A=\cfrac{1}{4}(6)(12)^2\cot\left( \frac{180}{6} \right) \\\\\\ A=216\cot(30^o)\implies A=216\sqrt{3} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{area of the hexagon}}{(216\sqrt{3})}~~\stackrel{height}{(10)}\implies 2160\sqrt{3}~~\approx ~~3741.2~cm^3[/tex]

Answer:

  400

Step-by-step explanation:

The 20 terms of the sum can be formed into 10 pairs, each with a sum of 40:

  = (1 +39) +(3 +37) +(5 +35) + ... +(19 +21)

  = 40 × 10 = 400

The indicated sum is 400.

Answer:

288

Step-by-step explanation:

(-2)x(-4)=8

(8)x(-6)=-48

(-48)x(-6)=288

Answer:

5 minutes

Step-by-step explanation:

it dives at positive 18 feet in a minute

however in order to dive at -54 feet, it must dive -5 times

18-18-18-18-18= -54

and 1min =18feet

so it needs 5minutes for the 5times

OR

Let x=the time needed to dive at -54 feet's

so 1min=18

x= -54

-54=18x

dividing both sides by 18

-54/18=18x/18

x=-54/18

x=-5

however time cannot be negative

therefore x =5

this implies that the penguin dives at -54 feet in 5 minutes.

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

Explanation:

n = 20 is the sample size

p = 0.035 is the probability of selecting someone who is from multiple births (twins, triplets, etc)

Either someone is a twin/triplet/etc or they aren't. This two option nature is a strong implication we have a binomial probability.

The binomial probability formula is

B(x) = (n C x)*(p)^x*(1-p)^(n-x)

where x is the number of successes and the n C x refers to the nCr combination formula.

We want to know the value of B(3), ie the value of B(x) when we have exactly x = 3 children from multiple births.

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

B(x) = (n C x)*(p)^x*(1-p)^(n-x)

B(3) = (20 C 3)*(0.035)^3*(1-0.035)^(20-3)

B(3) = (1140)*(0.035)^3*(0.965)^(17)

B(3) = 0.026673

There's roughly a 2.6673% chance of the 20 person sample having exactly 3 children who are from multiple births.

Side note: You can compute 20C3 = 1140 using the conventional nCr formula, or you can use Pascal's Triangle as an alternative route.

Answer:

b = 2

Step-by-step explanation:

[tex]\frac{a}{b-2}[/tex]

the denominator cannot be zero as this would make the expression undefined. Equating the denominator to zero and solving gives the value that b cannot be

b - 2 = 0 ( add 2 to both sides )

b = 2 ← excluded value

Answer:third option

Step-by-step explanation:

I just did it

Answer:

Perimeter of a triangle is the length that borders a triangle, you would just have to add all the side length's up

Step-by-step explanation:

[tex]\huge\underline{\red{A}\blue{n}\pink{s}\purple{w}\orange{e}\green{r} -}[/tex]

the question asks us to rationalise the given expression !

so let's start ~

[tex] \frac{6 - 4 \sqrt{3} }{6 + 4 \sqrt{3} } \\ \\ \implies \: \frac{6 - 4 \sqrt{3} }{6 + 4 \sqrt{3} } \: \times \: \frac{6 - 4 \sqrt{3} }{6 - 4 \sqrt{3} } = \frac{(6 - 4 \sqrt{3}) {}^{2} }{6 {}^{2} - 4 \sqrt{3} {}^{2} } \\ \\ \implies \frac{\: 6 {}^{2} + 4 \sqrt{3} {}^{2} - (2 \times 6 \times 4 \sqrt{3} )}{36 - 48} \\ \\ \implies \: \frac{36 + 48 - 48 \sqrt{3} }{ - 12} \\ \\ \implies \: \frac{84 + 48 \sqrt{3} }{ - 12} \\ \\ \implies \: \frac{ \cancel{- 12}(7 - 4 \sqrt{3} )}{ \cancel{ - 12} } \\ \\ \implies \: 7 - 4 \sqrt{3} [/tex]

hope helpful :D

Answer:

-7+4√3.

Step-by-step explanation:

6-4√3 / 6+4√3     Multiply top and bottom by  6-4√3:-

=  (6-4√3)( 6-4√3) / (6+4√3)(6- 4√3)

= (36-24√3- 24√3+48) / (36-48)

= (36-48√3+48) / (-12)

= -3 +4√3 - 4

=  -7 + 4√3.

Answer:

-13x +8y

Step-by-step explanation:

-5x+2y-8x+6y

rearranging;

-5x-8x+2y+6y

(-5x-8x)+(2y+6y)

(-13x)+(8y)

Answer:

-13X+8Y.

Step-by-step explanation:

Combine like terms, -5x-8x = -13x.

2y+6y = 8y. goodluck.

Answer:

Step-by-step explanation:

Given that the diameter of the flower bed is 17 m and the width of the side walk is 2 m for a total out side diameter of 21 m.

Total Area is pi *(D/2)^2 = 346.4 m^2

Now subtract the area of the 17 m diameter flower bed for the area of the sidewalk alone. 346.4 - (pi*(17/2)^2 = 346.4 - 227.0 = 119,4 m^2

Answer:  119,4 m^2

Step-by-step explanation:

The equation is area = p times r^2

8 times eight times 3.14 =  119,4 m^2

Hello! I'm here to help.

The answer is B. ✔

B. is correct because...

[tex]2.805 / 2.58 = 1.08[/tex]

[tex]0.46 / 0.406 = 1.13[/tex]

[tex]1.001 / 1.01 =[/tex] 0.99

That being said, the correct option is B.

Answer:

Correct!

Step-by-step explanation:

The solution is x = 1

Answer:

a) 17.6 ft

b) 81.8 mm

c) 9 cm

d) 12 in

Step-by-step explanation:

Use the formula: πd = circumference to solve this equation

so you need to double the radius to get the diameter.

a) 5.6π = 17.6 ft

b) 26π = 81.8mm

c) 56.5 / π = 18.0 cm / 2 = 9 cm

d) 75.4/ π = 24.0 cm / 2 = 12 in

Answer:

Divide by 4

In this case one side would be 27.5

Step-by-step explanation:

A square has four sides so 110/4=27.5

The product of 2.5 x 10^2 and 3.7 x 10^5 expressed in scientific notation is 9.25 x 10^7.

It is the way of writing a large number between 1 to 10 with a power of 10.

We have,

To multiply two numbers in scientific notation, we multiply their coefficients and add their exponents. So, we have:

= (2.5 x 10²) x (3.7 x 10^5)

= (2.5 x 3.7) x 10^(2+5)

= 9.25 x 10^7

Therefore,

The product of 2.5 x 10^2 and 3.7 x 10^5 expressed in scientific notation is 9.25 x 10^7.

Learn more about scientific notation here:

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The length of a will be a different number and the value will be 4.71in

The given diagram is a sector and the formula for calculating the length of an arc is expressed as:

Length of an arc = rβ

where

Given the following parameters

β .= 45 degrees

r = 6in

Substitute

Length of an arc = 6π/4

Length of an arc = 6(3.14)/4

Length of an arc = 4.71inches

This shows that the length of a will be a different number and the value will be 4.71in

Learn more on length of arc here: https://brainly.com/question/8020286

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