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3 years ago

Please help will give brainliest

Mathematics

2 answers:

IrinaVladis [17]3 years ago

7 0

Answer:

c=578

Step-by-step explanation:

To solve this we can use the law of sines.

Firstly, we need to find the measure of ∠C

As there are 180° in a triangle, we can find the difference between this and the measures of ∠A and ∠B

$180-70-52=58$

∠C=58°

Now we can setup our law of sines

$\frac{c}{sin(58)} =\frac{640}{sin(70)} \\\\c=\frac{640sin(58)}{sin(70)} \\\\c=577.58\\\\c=578$

lianna [129]3 years ago

5 0

Answer:

(this might be wrong but if your desperate) 518

Step-by-step explanation:

1. 70+52=122

2. 640-122= 518

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The coffee shop has 5 regular customers daily. On Saturday they have 6 times as many non-regular customers than on any given wee

vfiekz [6]

Answer:

Step-by-step explanation:

No, because there is no mutiplication sign, and it suppose to be 6x times 5.

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2 years ago

Carol has 1 5/8 cups of yogurt to make smoothies. Each smoothie uses 1/3 cup of yogurt. What is the maximum number of smoothies

Mashutka [201]

Answer:

The maximal number of smothies that Carol can make with the yogurt is 4.

Step-by-step explanation:

Divide the number of cups Carol has by the number of cups needed to make one smoothie.

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6 0

3 years ago

Read 2 more answers

Find the solution of this system of equations 4x - 5y = -12 -X + 5y = 18

Natalka [10]

4x - 5y = -12

-x + 5y = 18

Add the equations together:

4x + -x = 3x

-5y + 5y = 0

-12 + 18 = 6

So now you have:

3x = 6

Divide both sides by 3:

X = 2

Now you have the value of x, replace x with 2 in one of the equations and solve for y:

4(2) -5y = -12

8 -5y = -12

Subtract 8 from both sides:

-5y = -20

Divide both sides by -5:

Y = 4

The solution is x = 2 and y = 4 which is written as (2,4)

7 0

3 years ago

let a = (a1, a2) and b = (b1, b2) and c = (c1,c2) be three non zero vectors. if a1b2 - a2b1 is not equal to 0. then show three a

Ksenya-84 [330]

Consider the contrapositive of the statement you want to prove.

The contrapositive of the logical statement

p ⇒ q

¬q ⇒ ¬p

In this case, the contrapositive claims that

"If there are no scalars α and β such that c = αa + βb, then a₁b₂ - a₂b₁ = 0."

The first equation is captured by a system of linear equations,

$\begin{cases}c_1 = \alpha a_1 + \beta b_1\\ c_2 = \alpha a_2 + \beta b_2\end{cases}$

or in matrix form,

$\begin{pmatrix}c_1\\c_2\end{pmatrix} = \begin{pmatrix}a_1&b_1\\a_2&b_2\end{pmatrix}\begin{pmatrix}\alpha\\\beta\end{pmatrix}$

If this system has no solution, then the coefficient matrix on the right side must be singular and its determinant would be

$\begin{vmatrix}a_1&b_1\\a_2&b_2\end{vmatrix} = a_1b_2-a_2b_1 = 0$

and this is what we wanted to prove. QED

3 0

3 years ago

If x / 3 equals 6 then x equals

sleet_krkn [62]

Answer: X = 18

Step-by-step explanation:

Crossmultiply

8 0

3 years ago