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3 years ago

7

X = 8 , m = 3 , EVAULATE !!!! ILL GIVE YOU BRAINLIST SHOW WORK !!!

2 answers:

UNO [17]3 years ago

8 0

Answer:

<h2>2</h2>

Step-by-step explanation:

$2(3x+6)\div(10m)\\\\x =8\\m =3\\\\2(3(8)+6)\div(10(3))\\\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}\\\\\mathrm{Calculate\:within\:parentheses}\:\left(3\left(8\right)+6\right)\::\quad 30\\=2\times\:30\div \left(10\left(3\right)\right)\\\\\mathrm{Calculate\:within\:parentheses}\:\left(10\left(3\right)\right)\::\quad 30\\=2\times\:30\div \:30\\\\\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:2\times\:30\div \:30\:\\:\quad 2$

Stolb23 [73]3 years ago

5 0

Answer:

2

Step-by-step explanation:

plug it in

2(3(8)+6)/(10(3))

pemdas

2(24+6)/(30)

2(30)/(30)

60/30

2

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Find a and k so that the given points lie on the parabola (An algebraic solution is required)

Aleks [24]

For the given points to lie on the parabola,

a = -3 and k = 10.

An equation of a curve that has a point on it that is equally spaced from a fixed point and a fixed line is referred to as a parabola. The parabola's fixed line and fixed point are together referred to as the directrix and focus, respectively. It's also crucial to remember that the fixed point is not located on the fixed line. A parabola is a locus of any point that is equally distant from a given point (focus) and a certain line (directrix).

According to the question,

Equation of parabola : y = a $(x-2)^{2}$ + k

Points A(1,7) and B(4,-2)

For the points to lie on the parabola,

7 = a $(1-2)^{2}$ +k

7 = a + k

Similarly,

-2 = a $(4-2)^{2}$ + k

-2 = 4a + k

On solving the two equations simultaneously, we get,

a = -3

k = 10

Learn more about parabolas here:

brainly.com/question/4061870

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4 0

2 years ago

Read 2 more answers

Find the value of x.

alisha [4.7K]

Answer:

X=5

Step-by-step explanation:

the sum has to equal 180 because its a linear pair,

10×5=50

26×5=130

4 0

3 years ago

Help please :((( this is the last math problem

maks197457 [2]

Answer:

11.53 degrees.

Step-by-step explanation:

ok so we know the hyp and opp sides. this means that it is sin. according to SOHCAHTOA we do sin^-1(2/10). you should get 11.53

6 0

3 years ago

Read 2 more answers

PLEASE I NEED URGENT HELP

kari74 [83]

Answer:

D

Step-by-step explanation:

the exterior angle ACD = m< 1+ m <2 = 56+54 = 110

6 0

3 years ago

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A trucking firm suspects that the mean life of a certain tire. it uses is less than 33,000 miles. To check the claim, the firm r

Mice21 [21]

Answer:

We accept the alternate hypothesis. We conclude that the mean lifetime of tires is is less than 33,000 miles.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 33,000 miles

Sample mean, $\bar{x}$ = 32, 450 miles

Sample size, n = 18

Alpha, α = 0.05

Sample standard deviation, s = 1200 miles

a) First, we design the null and the alternate hypothesis

$H_{0}: \mu = 33000\text{ miles}\\H_A: \mu < 33000\text{ miles}$

b) Level of significance:

$\alpha = 0.05$

c) We use One-tailed t test to perform this hypothesis.

d) Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{32450 - 33000}{\frac{1200}{\sqrt{18}} } = -1.9445$

Now, $t_{critical} \text{ at 0.05 level of significance, 17 degree of freedom } = -1.7396$

Rejection area:

$t < -1.7396$

Since,

$t_{stat} < t_{critical}$

e) We fail to accept the null hypothesis and reject it as the calculated value of t lies in the rejection area.

f) We accept the alternate hypothesis. We conclude that the mean lifetime of tires is is less than 33,000 miles.

3 0

3 years ago