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3 years ago

Algebra test so please don’t answer unless you know you’re right.

Mathematics

1 answer:

charle [14.2K]3 years ago

3 0

Answer: I found the perimeter of the rectangle I got: 10x+4

Step-by-step explanation:

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Consider the lengths of the sides of a triangle as listed.

oksano4ka [1.4K]

I do not think triangle c is a right triangle

7 0

3 years ago

In triangle ABC, a = 9, c = 5, and B = 120°. Find b2.

anygoal [31]

Answer:

(D) $b^2=151$

Step-by-step explanation:

Given: In triangle ABC, a=9, c=5 and ∠B=120°.

To find: The value of $b^2$ .

solution: It is given that In triangle ABC, a=9, c=5 and ∠B=120°.

Now, using the law of cosines, we get

$b^2=a^2+c^2-2(a)(c)cosB$

Substituting the given values, we get

$b^2=9^2+5^2-2(9)(5)cosB$

$b^2=81+25-90(\frac{-1}{2})$

$b^2=81+25+45$

$b^2=151$

which is the required value of $b^2$ .

Therefore, option D is correct.

3 0

3 years ago

Can u help me please?

never [62]

Answer:

1. x = -15

2. x = 0.25 or x = 1/4

Step-by-step explanation:

8 + 9.8x + 9 = 3.8x - 16 + 3.8x

Simplify both sides

17 + 9.8x = 7.6x - 16

-17 -17

9.8x = 7.6x - 33

-7.6x -7.6x

2.2x = -33

Divide by 2.2

x = -15

-2x - 10 = -14x - 7

+7 +7

-2x - 3 = -14x

+2x +2x

-3 = -12x

Divide by -12

0.25 = x

x = 0.25 or x = 1/4

6 0

3 years ago

Help me with my math, please!!!!!!!

Sedaia [141]

Answer:

Answer is A

Function is increasing

f(x) was - 6 was below x-axis and then it reached 0 meaning it was rising or increasing.

5 0

3 years ago

pedro open his account with $710 and withdraw $35 per week. maria opened her account with $570 and withdrew $25 weekly .In how m

user100 [1]

In 14 weeks, if you turn both of those into equations you'll get

$y = - 35x + 710$
and
$y = - 25x + 570$

You should be then able to graph this and see that intersects at 14 weeks at 220 dollars

6 0

4 years ago