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3 years ago

Evaluate the expression when a = -6 and b = 3 A -2b

Mathematics

1 answer:

Rasek [7]3 years ago

6 0

Answer:

-6- (2(3))

-6-6=-12

Answer= -12

Step-by-step explanation:

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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

I WILL GIVE BRAINIEST Which statement is correct about the product of 9/10 and 7/8

Wewaii [24]

Answer:

7/10 and 7/8 are both less than 1.

Step-by-step explanation:

The product must be less than either factor because when you multiply a number by less than 1, the number gets smaller.

3 0

3 years ago

19. A diagonal of a quadrilateral is 26 cm and the perpendiculars drawn to it from the opposite

julsineya [31]

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3 0

3 years ago

What is the best first step to solve 2x - 4 = -2. ???

Nina [5.8K]

first you have to add the -4 to the -2 and you get 2. so 2x=2 then you divide 2 by 2x and get x=1

4 0

3 years ago

Suppose x and y vary together such that x is 7 times as large as y. write a formula that defines x in terms of y.

Ainat [17]

Since y is less than x by 7 times $\frac{x}{7}=y$ so in terms of x we write
x=7y

4 0

3 years ago