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gogolik [260]
3 years ago
14

Given that ABCD is a rhombus, what is the value of x?

Mathematics
1 answer:
Kruka [31]3 years ago
3 0

Answer:

  D.  18

Step-by-step explanation:

∠DAC ≅ ∠BCA and the diagonals cross at right angles, so the two marked angles are complementary.

  (5x -18) +x = 90

  6x = 108 . . . . . . . . . simplify, add 18

  x = 18 . . . . . . . . . . . divide by 6

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Evaluate the factorial expression. <br> 688!/687!
NNADVOKAT [17]

688!/687!

(688*687!)/687!

688

7 0
4 years ago
In August, Ralph bought a new set of golf clubs that cost $565. The cost of the clubs was marked up to $650 in October. Which pr
BartSMP [9]

The percent of the original price, the new price is given as 86.9%

<u>Solution:</u>

Given, In August, Ralph bought a new set of golf clubs that cost $565.  

The cost of the clubs was marked up to $650 in October.  

We have to find which proportion can be used to find what percent of the original price the new price is, if p represents the unknown percent?

The formula is normally partial/whole equals to percentage/100.  In this case $565 is partial because the price increased.  

So it will be,

\frac{565}{650}=\frac{p}{100}

\begin{array}{l}{565 \times 100=p \times 650} \\\\ {650 p=56500} \\\\ {p=\frac{56500}{650}=86.9230}\end{array}

Whenever you get results like these, you just need to round to the nearest hundredths place, which is 86.9%.

Hence, the percentage is 86.9%

5 0
3 years ago
What is matrix subtraction?
solniwko [45]
Two matrices may be added or subtracted only if they have the same dimension; that is, they must have the same number of rows and columns. Addition or subtraction is accomplished by adding or subtracting corresponding elements. For example, consider matrix A and matrix B. A =
5 0
4 years ago
A block of marble is in the shape of a rectangular prism. The block is 8 feet long, 2 feet wide, and 78 inches high. What is the
Komok [63]
Length of the block of marble in question is (l) = 8 feet
Width of the block of marble in question is (w) = 2 feet
Height of the block of marble in question is (h) = 78 inches
We already know that
1 inch = 0.08 foot
So
Height of the block of marble in question (h) = 78 * 0.08 foot
                                                                       = 6.24 feet
Then
Volume of the marble block = i * w * h
                                             = 8 * 2 * 6.24 cubic feet
                                             = 99.84 cubic feet
From the above dduction we can conclude that the volume of the marble block in the shape of a rectangular prism is 99.84 cubic feet.
7 0
3 years ago
PLEASE HELP ME ASAP!!!!!!!<br><br><br> ty! :)
Allisa [31]

Answer:

Infinite Solutions

Step-by-step explanation:

The lines overlap each other.

6 0
3 years ago
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