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3 years ago

Pls can some one help me??

Mathematics

1 answer:

Murljashka [212]3 years ago

6 0

join me and get help

Step-by-step explanation:

please answer this question urgent

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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

4 years ago

WILL MARK CORRECT ANSWER BRAINLIEST!! 100 Points!!

Vlad1618 [11]

Using the formula for the future value of an annuity: FV = P x (1 + rate)^time - 1 / rate)

1st account:

15,000 x (1 + 0.05)^10 - 1 /0.05) = $188,668.39

2nd account:

15,000 x (1 + 0.10)^10 - 1 /0.10) = $239,061.37

6 0

3 years ago

A door sign has a length of 5 inches and an area of 8 1/8 square inches. Find the unknown width.

jasenka [17]

Answer:

1.625

Step-by-step explanation:

8 1/8 is also known as 8.125

Divide

8 1/8 by 5 inches which gives you an answer of 1.625

5 0

3 years ago

The ratio of the number of girls to the number of boys at a school event was 9:8. After some time, 25 of the girls left and the

crimeas [40]

The answer would be 3:4

8 0

3 years ago

Slope 1/2, passes through (6,4)<br> Write in slope-intercept form

Hunter-Best [27]

Answer:

$\large\boxed{y=\dfrac{1}{2}x+1}$

Step-by-step explanation:

$\text{The slope-intercept form of an equation of a line:}\\\\y=mx+b\\\\m-slope\\b-y-intercept\\\\\text{We have:}\ m=\dfrac{1}{2}\ \text{and the point}\ (6,\ 4).\\\\\text{The equation:}\ y=\dfrac{1}{2}x+b.\\\\\text{Put the coordinates of the point to the equation:}\\\\4=\dfrac{1}{2}(6)+b\\\\4=3+b\qquad\text{subtract 3 from both sides}\\\\1=b\to b=1\\\\\text{Finally:}\\\\y=\dfrac{1}{2}x+1$

3 0

3 years ago

Pls can some one help me??​

Pls can some one help me??