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3 years ago

I need help solving this question

Mathematics

2 answers:

shepuryov [24]3 years ago

6 0

F(x) + g(x)
2x² + x= 3x²
1+-7=-6
= 3x²-6

mina [271]3 years ago

5 0

Combine like terms when adding f(x) and g(x) 2x^2 + x^2 and 1 + (-7) = 3x^2 - 6

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I need help, please

oksian1 [2.3K]

Yes, a rhombus is a rectangle if it has a similar shape of a square.Hope that helped

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3 years ago

abercrombie & Fitch is having a sale. The sign posted in the store says, "everything is marked down 65%." Scott buys a jacke

nikdorinn [45]

a) We have that the discount is 65 %

Scott buys a jacket for $150

First, we will calculate the discount

$150\times\frac{65}{100}=97.5$

then we need to subtract the quantity calculated above from the original price

$150-97.5=52.5$

After the markdown Scott paid $52.5

In order to know the taxes first, we need to calculate the 5% of $52.5

$52.5\times\frac{5}{100}=2.625$

then we will sum the 5% plus the price after the markdown

$52.5+2.625=55.125$

The total cost of the jacket is $55.125

5 0

1 year ago

Niech ktoś pomoże ! a)5 2\7 +1 3\7 -1\7= b)4 5\9 -2 4\9 +3 2\9= c)2 2\3 -(1 4\9 +2 3\9=

kvv77 [185]

A) 6 4/7

B) 5 3/9

C) 6 6/3

5 0

4 years ago

Work out 55 % of 2900

riadik2000 [5.3K]

Change 55% to 0.55
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4 0

3 years ago

Read 2 more answers

Solve for w, where w is a real number.

Ber [7]

Answer:

w= 9

Step-by-step explanation:

$\sqrt{ - 4w + 61} = w - 4$

Square both sides:

-4w +61= (w -4)²

$\boxed{(a - b)^{2} = a^2 -2ab + b^2 }$

Expand:

-4w +61= w² -2(w)(4) +4²

-4w +61= w² -8w +16

Simplify:

w² -8w +16 +4w -61= 0

w² -4w -45= 0

Factorize:

(w -9)(w +5)= 0

w -9= 0 or w +5= 0

w= 9 or w= -5 (reject)

Note:

-5 is rejected since we are only taking the positive value of the square root here. If the negative square root is taken into consideration, then w= -5 would give us -9 on both sides of the equation.

Why do we use negative square root?

When solving an equation such as x²= 4,

we have to consider than squaring any number removes the negative sign i.e., the result of a squared number is always positive.

In the case of x²= 4, x can be 2 or -2. Thus, whenever we introduce a square root, a '±' must be used.

However, back to our question, we did not introduce the square root so we should not consider the negative square root value.

6 0

2 years ago

Read 2 more answers