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3 years ago

7) BRAINLIEST + 12+ POINTS!! :)

Mathematics

2 answers:

Archy [21]3 years ago

5 0

Answer:

C) 34%

Step-by-step explanation:

[(40 × 25%) + (60 × 40%)] ÷ (40 + 60)

34/100 × 100

34%

Varvara68 [4.7K]3 years ago

4 0

Answer:

34%

Step-by-step explanation:

To find the concentration of the new solution, take the percent time the amount of each of the solutions

40 ml* 25% + 60 ml * 40% = 100 ml* percent

40 * .25 + 60 *.40 = 100 * P

10 + 24 = 100 P

34 = 100 P

Divide each side by 100

34/100 = P

.34 = P

Changing to

34%

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Graph the line that contains the point (o,3) and has a slope of 1/2

Katyanochek1 [597]

Answer:

Step-by-step explanation:

y-3=1/2(x-0)=1/2 x

2y-6=x

2y-x=6

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3 years ago

Find the sum of 46 + 42 + 38 + ... + (-446) + (-450)46+42+38+...+(−446)+(−450)

JulijaS [17]

sum of sequence Find the sum of 46 + 42 + 38 + ... + (-446) + (-450) is -25,250

<u>Step-by-step explanation:</u>

We need to find sum of sequence : 46 + 42 + 38 + ... + (-446) + (-450)

Given sequence is an AP with following parameters as :

$a=46\\d=42-46=-4$

So , Let's calculate how many terms are there as :

⇒ $a_n=a +(n-1)d$

⇒ $-450=46 +(n-1)(-4)$

⇒ $-496=(n-1)(-4)$

⇒ $\frac{-496}{-4}=n-1$

⇒ $124=n-1$

⇒ $n=125$

Sum of an AP is :

⇒ $S_n = \frac{n}{2}(2a+(n-1)d)$

⇒ $S_1_2_5 = \frac{125}{2}(2(46)+(125-1)(-4))$

⇒ $S_1_2_5 = \frac{125}{2}(-404)$

⇒ $S_1_2_5 =-25,250$

Therefore , sum of sequence Find the sum of 46 + 42 + 38 + ... + (-446) + (-450) is -25,250

3 0

3 years ago

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What are the solutions to this quadratic equation x2+6x-5=0

marishachu [46]

Answer:

See Below.

Explanation:

Quadratic Form:

$a {x}^{2} + bx + c$

Quadratic Formula:

$x = \frac{ - b + - \sqrt{ {b}^{2} - 4ac} }{2a}$

Based on the information given from the question, we can deduce:

a = 1

b = 6

c = -5

Now we can substitute all these values into the formula to find x.

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1 year ago

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Find the value of sin T rounded to the nearest hundredth, if necessary.

katovenus [111]

<h3>Answer: 0.6</h3>

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Work Shown:

sin(angle) = opposite/hypotenuse

sin(T) = VU/VT

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3 years ago

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You spent $175 on a pair of shoes and three shirts. Each shirt cost the same amount. The shoes cost four times the amount of one

sergey [27]

Step-by-step explanation:

1. making the equation:

shoes = x

shirts = y

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the green line is for 175 = x + 3y and the purple one is for x = 4y

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3 years ago