3 years ago

Enter a value for x that makes the equation 7x - 2(x + 1) + 18 = 8x - 11 true.

Mathematics

1 answer:

tino4ka555 [31]3 years ago

5 0

9
hope this helps :)

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Find the output, k, when the input, t, is -7−7minus, 7.<br> k = 10t-19k=10t−19

sleet_krkn [62]

The value of k is -89

Explanation:

The given expression is $k=10t-19$

We need to determine the output k, when the input t is -7

<u>Output k:</u>

The value of the output k can be determined by substituting the input $t=-7$ in the expression $k=10t-19$

Thus, we have,

$k=10(-7)-19$

Multiplying the terms 10 and -7, we have,

$k=-70-19$

Simplifying, we get,

$k=-89$

Thus, the value of k is -89

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3 years ago

Find the difference (10j-7)-(-9j+2)

JulijaS [17]

(j-9) is your answer

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3 years ago

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Which of the following is an arithmetic sequence?–20, –25, –30, –35, –45, ...

timurjin [86]

B) -15.6,-12.9,-10.2,-7.5,-4.8

This is an arithmetic sequence.

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3 years ago

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The diagram shows a 3 cm x 5 cm x 4 cm cuboid

Rainbow [258]

Answer:

a) The length of segment AC is approximately 5.83 centimeters.

b) The angle ACD is approximately 34.5º.

Step-by-step explanation:

a) Since $AB \perp BC$ , the length of segment $AC$ is determined by Pythagorean Theorem, that is:

$AC = \sqrt{(5\,cm)^{2}+(3\,cm)^{2}}$

$AC \approx 5.831\,cm$

The length of segment AC is approximately 5.831 centimeters.

b) Since $AB \perp BC \perp AD$ , the length of segment $AD$ is determined by this Pythagorean identity:

$AD = \sqrt{(3\,cm)^{2}+(5\,cm)^{2}+(4\,cm)^{2}}$

$AD \approx 7.071\,cm$

The angle ACD is determined by the following trigonometric expression:

$\cos C = \frac{AC}{CD}$

$\cos C = \frac{5.831\,cm}{7.071\,cm}$

$\cos C = 0.825$

$C = \cos^{-1} 0.825$

$C \approx 34.448^{\circ}$

The angle ACD is approximately 34.448º.

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2 years ago

Find the center and radius of (x + 8)2 + (y + 4)2 = 49.

Aleksandr-060686 [28]

Shouldnt it be -8,4;7

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3 years ago