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2 years ago

Help plssssssssssssssssss

Mathematics

2 answers:

Evgesh-ka [11]2 years ago

6 0

Answer:

Step-by-step explanation:

amm18122 years ago

4 0

Answer:

Step-by-step explanation:

60 divided by 9 = 6.666

6.666 times 12 = 79

So closes is 72 :)

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5 times something + 10=8

vredina [299]

Let sth be x
5x+10=8
5x=-2
x=-2/5
x=-0.4

7 0

3 years ago

The eqution of the diagonal of a parallelogram is 3y=5x +k. The two opposite vertices of a parallelogram are the points (1,-2),

astraxan [27]

Answer:

$k = 1$

Step-by-step explanation:

Given

$3y = 5x + k$

Opposite points: $(1,-2)$ and $(-2,1)$

Required

Find k

First, calculate the midpoint of the opposite points.

$(x,y) = 0.5(x_1 + x_2,y_1 + y_2)$

This gives:

$(x,y) = 0.5(1 -2,-2 + 1)$

$(x,y) = 0.5(-1,-1)$

Open bracket

$(x,y) = (-0.5,-0.5)$

The equation $3y = 5x + k$ becomes:

$3 * -0.5 = 5 * -0.5 + k$

$-1.5 = -2.5 + k$

Solve for k

$k = 2.5-1.5$

$k = 1$

4 0

2 years ago

If you place a 45-foot ladder against the top of a 36-foot building, how many feet will the bottom of the ladder be from the bot

ad-work [718]

Do you mean the top of the ladder and the top of the building? If so, it would be 9 feet<span />

5 0

3 years ago

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!

ivann1987 [24]

1 + 1x
"the sum of one and" 1 +
"the product of" x
"one" 1 x
"and a number x" 1 x (x)
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8 0

2 years ago

Find an explicit rule for the nth term of the sequence.The second and fifth terms of a geometric sequence are 18 and 144, respec

vova2212 [387]

Given:

second term = 18

fifth term = 144

The nth term of a geometric sequence is:

$\begin{gathered} a_n\text{ = ar}^{n-1} \\ Where\text{ a is the first term} \\ r\text{ is the common ratio} \end{gathered}$

Hence, we have:

$\begin{gathered} \text{ar}^{2-1}\text{ = 18} \\ ar\text{ = 18} \\ \\ ar^{5-1}=\text{ 144} \\ ar^4\text{ =144} \end{gathered}$

Divide the expression for the fifth term by the expression for the second term:

$\begin{gathered} \frac{ar^4}{ar}\text{ = }\frac{144}{18} \\ r^3\text{ = }\frac{144}{18} \\ r\text{ = 2} \end{gathered}$

Substituting the value of r into any of the expression:

$\begin{gathered} ar\text{ = 18} \\ a\text{ }\times\text{ 2 = 18} \\ Divide\text{ both sides by 2} \\ \frac{2a}{2}\text{ =}\frac{18}{2} \\ a\text{ = 9} \end{gathered}$

Hence, the explicit rule for the sequence is:

$a_n\text{ = 9\lparen2\rparen}^{n-1}$

5 0

10 months ago