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2 years ago

Can someone pleaseeee help if you’re correct I’ll give u brainlist

Mathematics

1 answer:

marusya05 [52]2 years ago

6 0

Answer:

JL = 8 m

KD = 8 m

Step-by-step explanation:

By 45° - 45° - 90° triangle theorem:

$JK = \frac{1}{ \sqrt{2} } JD \\ \\JK = \frac{1}{ \sqrt{2} } \times 8 \sqrt{2} \\ \\ \red{JK = \boxed{8 }}\: m \\ \\ KD= \frac{1}{ \sqrt{2} } JD \\ \\KD = \frac{1}{ \sqrt{2} } \times 8 \sqrt{2} \\ \\ \purple{ KD = \boxed{8 } }\:m\\ \\$

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A notebook costs $4.50 plus sales tax . After sales tax , the notebook is $4.86. What is the sales tax rate?

UkoKoshka [18]

Answer:

Step-by-step explanation:

0.36/4.50=0.08=8%

6 0

2 years ago

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WILL GIVE BRAINLIEST!<br> Translate into a variable expression. the sum of sixteen and c

Art [367]

Answer:

16+c

Step-by-step explanation:

Sum means we will have to add. When it says "sum of sixteen and c" it is telling us to add both sixteen and c together.

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3 years ago

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The 5th term in a geometric sequence is 160. The 7th term is 40. What are possible values of the 6th term of the sequence?

omeli [17]

Answer:

C. The 6th term is positive/negative 80

Step-by-step explanation:

Given

Geometric Progression

$T_5 = 160$

$T_7 = 40$

Required

$T_6$

To get the 6th term of the progression, first we need to solve for the first term and the common ratio of the progression;

To solve the common ratio;

Divide the 7th term by the 5th term; This gives

$\frac{T_7}{T_5} = \frac{40}{160}$

Divide the numerator and the denominator of the fraction by 40

$\frac{T_7}{T_5} = \frac{1}{4}$ ----- equation 1

Recall that the formula of a GP is

$T_n = a r^{n-1}$

Where n is the nth term

So,

$T_7 = a r^{6}$

$T_5 = a r^{4}$

Substitute the above expression in equation 1

$\frac{T_7}{T_5} = \frac{1}{4}$ becomes

$\frac{ar^6}{ar^4} = \frac{1}{4}$

$r^2 = \frac{1}{4}$

Square root both sides

$r = \sqrt{\frac{1}{4}}$

r = ± $\frac{1}{2}$

Next, is to solve for the first term;

Using $T_5 = a r^{4}$

By substituting 160 for T5 and ± $\frac{1}{2}$ for r;

We get

$160 = a \frac{1}{2}^{4}$

$160 = a \frac{1}{16}$

Multiply through by 16

$16 * 160 = a \frac{1}{16} * 16$

$16 * 160 = a$

$2560 = a$

Now, we can easily solve for the 6th term

Recall that the formula of a GP is

$T_n = a r^{n-1}$

Here, n = 6;

$T_6 = a r^{6-1}$

$T_6 = a r^5$

$T_6 = 2560 r^5$

r = ± $\frac{1}{2}$

So,

$T_6 = 2560( \frac{1}{2}^5)$ or $T_6 = 2560( \frac{-1}{2}^5)$

$T_6 = 2560( \frac{1}{32})$ or $T_6 = 2560( \frac{-1}{32})$

$T_6 = 80$ or $T_6 = -80$

$T_6 =$ ±80

Hence, the 6th term is positive/negative 80

8 0

3 years ago

FIND THE MEASURE OF EACH MISSING ANGLE HURRY DUE AT 10

max2010maxim [7]

Because of a linear pair then because of vertical angles and because all angles have to be 180 added up

5 0

3 years ago

What is (-94)÷5+22÷22's square?

Paha777 [63]

Answer:

Error

Step-by-step explanation:

(-94)/5+22/22 Given

-18.8+1 PEMDAS (do -94/5 and 22/2)

-17.8 Add the numbers

After you add the numbers, you take the square root. you will get the answer "Error" because you cannot take the square root of a negative number

5 0

3 years ago

￼ Can someone pleaseeee help if you’re correct I’ll give u brainlist

Can someone pleaseeee help if you’re correct I’ll give u brainlist