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just olya [345]
3 years ago
12

Does anyone know how to do this

Mathematics
2 answers:
Shkiper50 [21]3 years ago
4 0

Answer:

7 (x-1)(x+5)

Step-by-step explanation:

Find

GCF = 7

 

Factor out the GCF. (Write the GCF first. Then, in parentheses, divide each term by the GCF.)

7 (7x^2/7 + 28x/7 - 35/7)

Simplify each term in parentheses.

7 (x^2 +4x-5)

Simplify.

Scilla [17]3 years ago
3 0

Answer:

7 {x}^{2}  + 28x - 35 = 0

7 {x}^{2}  + 35x - 7x - 35 = 0

7x(x + 5)  - 7(x + 5) = 0

(x + 5)(7x - 7) = 0

(x + 5)(x - 1)  = 0

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Name the postulate or theorem you can use to prove the triangles congruent
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Answer:

ASA

Step-by-step explanation:

if you understood the other, similar questions now, this one is really, really easy.

we got the confirmation for 2 angles and the side between these angles.

so, angle side angle or ASA

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8. Part A: Find the value of x.
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Answer:

B.x=3

Part B. 15 units


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What two numbers multiply to negative 54 and add up to 3
DENIUS [597]
The roots of 54 are: 1 and 54, 2 and 27, 3 and 18, 6 and 9, then it restarts all over again.

The two numbers have to multiply up to 54, and add up to 3. 9 and 6 have a difference of 3, and the multiplied sum is negative, so this is your pair.

9 and -6 fit this criteria, since they add up to 3 and multiply to 64.
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The image shown has two triangles sharing a vertex:
ivanzaharov [21]

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Step-by-step explanation:

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3 years ago
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The length of a photograph is 3cm less than twice the width. The area is 54cm^2. Find the dimensions of the photograph.
REY [17]
W= width
l= length= 2w-3

Area= length * width
A= lw
substitute l=2w-3 for l
54= (2w-3)(w)
54= 2w^2 - 3w
subtract 54 from both sides
0= 2w^2 - 3w - 54
factor the polynomial
0= (2w + 9)(w - 6)

Set each set of parentheses equal
to 0 and solve for width.

0=2w+9
-9=2w
-4.5= w NEGATIVE VALUE

0=w-6
6 cm=w

-4.5 is not the answer because it has a negative value. You cannot have a negative side of a photograph. So substitute 6 in to find length.

length= 2w-3
l= 2(6)-3
l= 12-3
l= 9 cm

CHECK:
w= 6cm
l= 9cm
Area= length * width
54= 6*9
54= 54

ANSWER: width= 6cm; length= 9cm

Hope this helps! :)
4 0
3 years ago
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