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3 years ago

PLEAS HELP WITH MATH!!!!!!!!!!!!!!

Mathematics

1 answer:

Contact [7]3 years ago

3 0

Z - 7/9 = 5/9
z = 5/9 + 7/9
z = 4/3

Answer: z = 4/3.

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Find the solution of the system of equations. 6x + 8y = -8 x + 4y = 4 ( , )

ladessa [460]

Answer:

the solution is (-4, 2)

Step-by-step explanation:

6x + 8y = -8

x + 4y = 4

... can be solved using elimination by addition and subtraction, among other methods. Multiply the second equation by -2 to obtain

6x + 8y = -8

-2x - 8y = -8

Combining these results in

4x = -16. Thus, x = -4.

Substituting -4 for x in x + 4y = 4 results in

-4 + 4y = 4, or 4y = 8, or y = 2

Then the solution is (-4, 2)

8 0

3 years ago

ILL GIVE BRAINLIEST IF YOUR CORRECT PLEASE HELP

777dan777 [17]

Answer:

B) 72 cm²

Step-by-step explanation:

Area of a trapezoid formula:

$A=\frac{a+b}{2} *h$

Given:

a = 15

b = 9

h = 6

Work:

$A=\frac{a+b}{2} *h\\\\A=\frac{15+9}{2} *6\\\\A=\frac{24}{2} *6\\\\A=12*6\\A=72$

4 0

2 years ago

Read 2 more answers

There are 3 times as many students participating in the hiking trip this year than last year. There are 42 students on the trip

Effectus [21]

Answer:

126 students this year

Step-by-step explanation:

All you got to do is multiply 42 by 3

8 0

3 years ago

Orthogonalizing vectors. Suppose that a and b are any n-vectors. Show that we can always find a scalar γ so that (a − γb) ⊥ b, a

jeka57 [31]

Answer:

$\\ \gamma= \frac{a\cdot b}{b\cdot b}$

Step-by-step explanation:

The question to be solved is the following :

Suppose that a and b are any n-vectors. Show that we can always find a scalar γ so that (a − γb) ⊥ b, and that γ is unique if $b \neq 0$ . Recall that given two vectors a,b a⊥ b if and only if $a\cdot b =0$ where $\cdot$ is the dot product defined in $\mathbb{R}^n$ . Suposse that $b\neq 0$ . We want to find γ such that $(a-\gamma b)\cdot b=0$ . Given that the dot product can be distributed and that it is linear, the following equation is obtained