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STatiana [176]
3 years ago
6

Can someone explain to me how to solve these ?

Mathematics
1 answer:
boyakko [2]3 years ago
8 0
\bf 21)\\\\
\cfrac{c}{a}=r+d\implies \cfrac{c}{r+d}=a
\\\\\\
23)\\\\
ka=v+w\implies a=\cfrac{v+w}{k}
\\\\\\
25)\\\\
z=y+mx\implies z-y=mx\implies \cfrac{z-y}{m}=x
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The factorization of x2 + 3x – 4 is modeled with algebra
meriva

Option C: (x+4) and (x-1) are the factors of the equation

Explanation:

Given that the equation is x^{2} +3x-4

We need to determine the factors of the equation.

Splitting the middle term, we get,

x^{2} +4x-x-4

Grouping the terms, we have,

x(x+4)-1(x+4)

Let us factor out the term (x+4), we have,

(x+4)(x-1)

Thus, the factors of the equation are (x+4) and (x-1)

Hence, Option C is the correct answer.

4 0
3 years ago
Dale drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took hours. When Dale drove hom
IrinaK [193]

Dale drove to the mountains last weekend. there was heavy traffic on the way there, and the trip took 7 hours. when dale drove home, there was no traffic and the trip only took 5 hours. if his average rate was 18 miles per hour faster on the trip home, how far away does dale live from the mountains? do not do any rounding.

Answer:

Dale live 315 miles from the mountains

Step-by-step explanation:

Let y be the speed  of Dale to the mountains

Time taken by Dale to the mountains=7 hrs

Therefore distance covered by dale to the mountain = speed × time = 7y ......eqn 1

Time taken by Dale back home = 5hours

Since it speed increased by 18 miles per hour back home it speed = y+18

So distance traveled home =speed × time = (y+18)5 ...... eqn 2

Since distance cover is same in both the eqn 1 and eqn 2.

Eqn 1 = eqn 2

7y = (y+18)5

7y = 5y + 90

7y - 5y = 90 (collection like terms)

2y = 90

Y = 45

Substitute for y in eqn 1 to get distance away from mountain

= 7y eqn 1

= 7×45

= 315 miles.

∴ Dale leave 315 miles from the mountains

4 0
3 years ago
Y=7.5x, where y represents total money spent for tickets. Is it proportional or non-proportional.
Nookie1986 [14]
Proportional because there is no + x at the end<span />
4 0
3 years ago
Wholesale price of coffeemaker = $31.55<br>Percentage markup = 17%<br>Retail price?​
serious [3.7K]

Answer:

$36.9135

Step-by-step explanation:

Markup = 17% of 31.55

= 17/100 × 31.55

= 5.3635

Retail price = whole sale price + markup

= 31.55 + 5.3635

= $36.9135

8 0
3 years ago
How to show my work for 4+(-3)=1
shutvik [7]

<u><em>Answer: → =1 *The answer must have a positive sign.*</em></u>

Explanation:

First, you had to do is remove parenthesis.

4-3

And then, subtract by the numbers.  Subtract it's going to be subtract by the numbers, fractions, and find the difference between the numbers.

4-3=1

Hope this helps!

6 0
3 years ago
Read 2 more answers
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