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3 years ago

I need to know carly’s mistake

Mathematics

2 answers:

borishaifa [10]3 years ago

8 0

Answer:

Carly multiply by -4 instead of dividing

Step-by-step explanation:

-4(7j+2) = 10

Divide each side by -4

-4/-4(7j+2) = 10/-4

7j+2 = -2.5

Ivenika [448]3 years ago

5 0

Answer:

Carly's mistake is in Step 1. She multiplied -4 and 10 instead of dividing -4 and 10

Step-by-step explanation:

-4(7j+2)=10

7j+2= -2.5

7j= -4.5

j= -0.643 or j = -4/7

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Find the 7th term of the geometric sequence whose common ratio is 1/3 and whose first term is 5.

wolverine [178]

Answer:

$t_7 =\frac{5}{729}$

Step-by-step explanation:

We are given that:

First term (a) = 5

common ratio (r) = $\frac{1}{3}$

The nth term of a geometric sequence is given as:

$t_n =ar^{n-1} \\\therefore t_7 =5\times \bigg(\frac{1}{3}\bigg) ^{7-1} \\\therefore t_7 =5\times \bigg(\frac{1}{3}\bigg) ^{6} \\\therefore t_7 =5\times \bigg(\frac{1}{3}\bigg) ^{6} \\\therefore t_7 =5\times \frac{1}{729}\\\\\huge\red{\boxed{\therefore t_7 =\frac{5}{729} }}$

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4 years ago

Convert 81° to radians.

SOVA2 [1]

Answer: 9π/20 radians

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3 years ago

It costs $15 to send 3 packages through a certain shipping company. Consider the number of packages per dollar. a. Find the cons

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6 0

3 years ago

Use compatible numbers to estimate the quotient 2,545÷4

victus00 [196]

Answer:

600

Step-by-step explanation:

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3 years ago

Given the figure below, find the values of x and z.<br> (10x - 65)<br> (9x - 49)

nexus9112 [7]

(10x - 65) degrees is equal to (9x - 49) degrees, therefore you can set them into an equation.

(10x - 65) = (9x - 49)

By subtracting 9x in both sides,

(10x - 9x) - 65 = (9x -9x) - 49

x - 65 = -49

By adding 65 in both sides,

x - 65 + 65= -49 + 65
x = 16

Next, to find the value of z, it’s important to know that the straight line has 180 degrees. Then you would substitute the x value you found into one of your equation and subtract it from 180.

10 (16) - 65 = 160 - 65 = 95

Now you know that (10x - 65) degrees is equal to 95 degrees,

180 - 95 = z = 85

Answer: x = 16
z = 85

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3 years ago