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3 years ago

Answer? I don’t understand any of this

Mathematics

1 answer:

9966 [12]3 years ago

7 0

$Answer:\\ Let\: x\: be\: the\: miles\: they\: run \\ \Rightarrow We \: have \: an \: equation:0.55x + 35 + 20 = 0.65x + 45 \\ \Leftrightarrow 0.65x + 45 = 0.55x + 55 \\ \Leftrightarrow 0.1x = 10\Leftrightarrow x = 100 \\ \Rightarrow The \: rental \: costs \: of\: both \: companies \: are \: the \: same \: at \: 100 \: miles$

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A triangle has side lengths of 6, 8, and 9. What type of triangle is it? right obtuse equiangular acute

Marta_Voda [28]

Answer:

acute

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Please help me on this problem

Anna71 [15]

Answer:

The pairs of integer having two real solution for $ax^{2} -6x+c = 0$ are

$a = -4, c = 5$
$a = 1, c = 6$
$a = 2, c = 3$
$a = 3, c = 3$

Step-by-step explanation:

Given

$ax^{2} -6x+c = 0$

Now we will solve the equation by putting all the 6 pairs so we get the following

$-3x^{2} -6x-5 = 0$ for $a = -3 , c=-5$

$-4x^{2} -6x+5 = 0$ for $a = -4 , c=5$

$1x^{2} -6x+6 = 0$ for $a = 1 , c=6$

$2x^{2} -6x+3 = 0$ for $a = 2 , c=3$

$3x^{2} -6x+3 = 0$ for $a = 3 , c=3$

$5x^{2} -6x+4 = 0$ for $a = 5 , c=4$

The above all are Quadratic equations inn general form $ax^{2} +bx+c=0$

where we have a,b and c constant values

So for a real Solution we must have

$Disciminant , b^{2} -4\timesa\timesc \geq 0$

for $a = -3 , c=-5$ we have

$Discriminant =-24$ which is less than 0 ∴ not a real solution.

for $a = -4 , c=5$ we have

$Discriminant = 116$ which is greater than 0 ∴ a real solution.

for $a = 1 , c=6$ we have

$Discriminant =12$ which is greater than 0 ∴ a real solution.

for $a = 2 , c=3$ we have

$Discriminant =12$ which is greater than 0 ∴ a real solution.

for $a = 3 , c=3$ we have

$Discriminant =0$ which is equal to 0 ∴ a real solution.

for $a = 5 , c=4$ we have

$Discriminant =-44$ which is less than 0 ∴ not a real solution.

7 0

3 years ago

Please help marked brainliest if correct.

solmaris [256]

Answer: Michael is 72.

hope this helps

Step-by-step explanation:

Let Brandon be b. Then Michael is 3g.

3g-18=9(b-18)

3g-18=9g-162

6g=144

b=24

3g=72

5 0

3 years ago

Pizza Uno offers 2/3 of a small pizza for $3.50. Pizza Duo offers % of a small pizza for $4.20. How much does each charge for a

Phantasy [73]

Answers:

Pizza Uno = $5.25
Pizza Duo = $5.60

Those are the costs for a whole small pizza.

==========================================================

Explanation:

Let

x = cost of whole small pizza from Pizza Uno
y = cost of whole small pizza from Pizza Duo

x and y are some dollar amount, so they cannot be negative numbers. It also doesn't make sense to have them be 0 either. So we'll make them positive.

2/3 of x is equal to 3.50 as the first sentence mentions. This forms the equation (2/3)*x = 3.50

Multiply both sides by the reciprocal of 2/3 to isolate x

(2/3)*x = 3.50

(3/2)*(2/3)*x = (3/2)*3.50

x = 5.25

Pizza Uno charges $5.25 for a whole small pizza.

----------------------------

Pizza Duo charges $4.20 for 3/4 of a small pizza, meaning the equation we need to solve is

(3/4)y = 4.20

We'll use the same idea as the last equation to get...

(3/4)y = 4.20

(4/3)*(3/4)y = (4/3)*4.20

y = 5.60

Pizza Duo charges $5.60 for a whole small pizza.

Pizza Uno is the better deal (assuming both pizzas taste the same or you don't have a preference for either). You would save $5.60 - $5.25 = $0.35 = 35 cents.

7 0

3 years ago

This is kind of off topic for math but I still need to know the answer, so I’ve finished all my math work and I know my work is

Mariulka [41]

Answer:

email or call or talk to your teacher and ask why

Step-by-step explanation:

6 0

2 years ago