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Tpy6a [65]
3 years ago
9

[{(-42)÷7} -(-2)] × (-7) +7

Mathematics
2 answers:
sweet-ann [11.9K]3 years ago
4 0

Answer:

35

Step-by-step explanation:

Vera_Pavlovna [14]3 years ago
4 0

Answer:

35

Step-by-step explanation:

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Explain, with a test, why the two triangles in each figure are similar. Find the
frutty [35]

Answer:

x = 3, y = 6

Step-by-step explanation:

In the figure attached,

If ΔADE and ΔABC are similar triangles, their corresponding sides will be in the same ratio.

By this property,

\frac{AB}{AD}=\frac{AC}{AE}=\frac{BC}{DE}

\frac{AB}{AD}=\frac{AC}{AE}

\frac{AD+BD}{AD}=\frac{AE+EC}{AE}

\frac{3}{2}=\frac{x+1.5}{x}

3x = 2x + 3

3x - 2x = 3

x = 3

Similarly, \frac{AB}{AD}=\frac{BC}{DE}

\frac{3}{2}=\frac{y}{4}

y = \frac{3\times 4}{2}

y = 6

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3 years ago
The radius of a solid hemisphere is 2r. Find its total surface area
Musya8 [376]

Answer:

Radius= 2r

Step-by-step explanation:

Surface area of hemisphere

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=44/7 x 4 r^2

=174/7 r^2

=25.14 r^2

5 0
3 years ago
Enter the number that makes the equation true.<br><br> 0.26 - 41/100 = blank/100 - 41/100
Lerok [7]
Note that you are subtracting the same number from both sides. Thus, blank/100 must equal .26. Convert .26 to a fraction by placing it over 100 and removing the decimal point: 26/100. blank = 26
5 0
3 years ago
Is the number 17 a prime or composite number?
Alborosie

Answer:

It is a prime number.

Step-by-step explanation:

A prime number is a number that can only be the product of 1 and itself. 17 can only be multiplied by 1 and 17, so it is prime.

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3 years ago
What is the slope of the line y = 3?
bonufazy [111]

Answer:

slope = 0

Step-by-step explanation:

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Since it is parallel to the x- axis then slope = 0

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3 years ago
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