Help I will mark brainly

Steve earns $9.45 less than twice the amount Bill earns. Steve earns $152.55. How much does Bill earn? Write an equation, Use x

Anna11 [10]

Equation
2x-9.45=152.55
x=81

5 0

3 years ago

Why is 9.6 rational <br> plz help quick...

dangina [55]

The reason that 9.6 is rational is because it can be turned into a fraction.

The fraction is 48/5.

Rational numbers are numbers that can be turned into a fraction, while irrational numbers a those who cannot be turned into a fraction.

6 0

3 years ago

Word Problems

alekssr [168]

1. 45

write the consecutive numbers as x, x+1 and x+2 as its a sum 3x+3=138 so 3x+135 and x=45

2.$4

27-3=24, 6 candy bars for $24 dollars so $4 each

3. 6 hours

59-11 initial fee is $48 at a rate of $8 per hour, 48/8 is 6hours

4.52

29 is half of what he had once getting 6 new cards

so 58-6 52 giving the original number

5.27

using the same method as 1

6.21

odd numbers must be written as 2n+1,2n+3,2n+5

the sum 6n+9 =69

n=10

2n+1=21

7. 12

12-6 =6

6x2=12

8.$6

12-9=3

this is half the allowance so the is 3x2=6

9.57

291-6=285 is the number in all 5 buses total

285/5=57 students per bus

10.19

184-13= 171 dollars spent on all nine books

171/9=19 per book

5 0

3 years ago

WILL MARK BRANLIEST!! part a: Abe rented a bike at $36 for five days. If he rents the same bike for eight days, he has to pay a

AVprozaik [17]

<h3>Hello i hope you having a good day :) Question : Part a: Abe rented a bike at $36 for five days. If he rents the same bike for eight days, he has to pay a total rent of $48.</h3><h3>So we can set the fixed free of the renting that would be (f) and the dynamic free as (d) per the day then we have F + 5d = 36 F + 8d = 48 there for we have f = 16 and d = 4 so it would be y = 16 + 4x.</h3><h3>Hopefully this help you.</h3>

5 0

3 years ago

HELP PICS INCLUDED! WILL GIVE BRAINLIEST! SHOW WORK AND EXPLAIN

Naddik [55]

I assume you know about the dot product, and that for two vectors $\mathbf a$ and $\mathbf b$ , the angle between them $\theta$ satisfies

$\mathbf a\cdot\mathbf b=\|\mathbf a\|\|\mathbf b\|\cos\theta\iff\cos\theta=\dfrac{\mathbf a\cdot\mathbf b}{\|\mathbf a\|\|\mathbf b\|}$

Then the vectors are parallel if the angle between them is 0 or 180 degrees (0 or pi radians), which would make $\cos\theta=1$ or $\cos\theta=-1$ , respectively.

Part A)

$\vec v_1=\langle\sqrt3,1\rangle\implies\|\vec v_1\|=\sqrt{(\sqrt3)^2+1^2}=\sqrt4=2$

$\vec v_2=\langle-\sqrt3,-1\rangle=-\vec v_1\implies\|\vec v_2\|=\|\vec v_1\|=2$

$\vec v_1\cdot\vec v_2=(\sqrt3)(-\sqrt3)+(1)(-1)=-4$

Then the angle between $\vec v_1,\vec v_2$ is such that

$\cos\theta=\dfrac{-4}{(2)(2)}=-1\implies\theta=\pi\,\mathrm{rad}$

so these vectors are parallel ("antiparallel", more specifically, which means they are parallel but point in opposite directions).

Part B) involves the same computations:

$\vec u_1=\langle2,3\rangle\implies\|\vec u_1\|=\sqrt{2^2+3^2}=\sqrt{13}$

$\vec u_2$ has the same components but differing by sign and order, as $\vec u_1$ ; its magnitude remains the same, though:

$\vec u_2=\langle-3,-2\rangle\implies\|\vec u_2\|=\sqrt{(-3)^2+(-2)^2}=\sqrt{13}$

$\vec u_1\cdot\vec u_2=(2)(-3)+(3)(-2)=-12$

$\implies\cos\theta=\dfrac{-12}{(\sqrt{13})(\sqrt{13})}=-\dfrac{12}{13}\implies\theta=\cos^{-1}\left(-\dfrac{12}{13}\right)$

which is neither 0 nor pi, which means these vectors are not parallel.

4 0

4 years ago