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3 years ago

Find each product mentally. 7 times 3.8

1 answer:

5 0

To do it mentally means to do it in your head

first do 7 * 3 = 21 in your head

than do 7 * 0.8 = 5.6 ( this might be hard to do in your head but you know 7*8 = 56 so add a decimal since it is 0.8 not 8 )

Add : 21 + 5.6 = 26.6

Final Answer : 26.6

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△ABC ≅ △DEF, EF = x 2 - 7, and BC = 4x - 2.

Artist 52 [7]

Answer:

Therefore the value of x is 5.

Step-by-step explanation:

Given:

△ABC ≅ △DEF,

EF = x 2 - 7, and

BC = 4x - 2.

To Find:

the values of x. = ?

Solution:

△ABC ≅ △DEF ........Given

If two Triangles are congruent then the Corresponding Parts of Congruent Triangles are Congruent.

∴ BC ≅ EF ...................CPCTC

Substituting the values we get

$4x-2=x^{2}-7\\x^{2}-4x-5=0$

Now By Factorizing we get

$x^{2}-5x+x-5=0\\x(x-5)+1(x-5)=0\\(x+1)(x-5)=0\\x+1=0\ or\ x-5=0\\x=-1\ or\ x=5\\x\ cannot\ be\ negative\\\therefore x=5$

Therefore the value of x is 5.

8 0

3 years ago

Monica bowled three games. Her scores were 175, 142, and 133. What was her mean, or average, score

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Answer:

Her average score is 150

Step-by-step explanation:

You add 175+142+133 and divide it by 3

To find mean or average you add up all the numbers and divide by how many numbers there are

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Answer:

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Step-by-step explanation:

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3 years ago

Write the formula of the function y whose graph is show.

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Answer:

im on the same question

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In photo, please help I am timed!!

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Answer:

Step-by-step explanation:

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