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3 years ago

Solve for a.

Mathematics

2 answers:

Shalnov [3]3 years ago

3 0

Answer:

the answer is -3

Step-by-step explanation:

1. add the -4 to 10 (-10 + 4)

2. -6= 2a

3. divide both sides by 2

4. -3= a

hope this helps

Bogdan [553]3 years ago

3 0

Answer:

-3

Step-by-step explanation:

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HELP

kaheart [24]

Answer:

We find the perimeter using the distance formula between two points.

1) A(2, -4), B(-2, -1), C(-5, -5), D(-1, -8)

AB = $\sqrt{(x_2-x_1)^{2}+(y_2-y_1)^{2}}$

= $\sqrt{(-2-2)^{2}+(-1+4)^{2} }$

= $\sqrt{25}$

= 5 units

Similarly, BC = 5 units

CD = 5 units

AD = 5 units

Perimeter = AB+BC+CD+AD = 20 units (E)

2) X(-2, 1), Y(4, 3), Z(5, -1)

XY = $\sqrt{(x_2-x_1)^{2}+(y_2-y_1)^{2}}$

= $\sqrt{(4+2)^{2}+(3-1)^{2} }$

= √40 = 6.3

Similarly, YZ = √17 = 4.1

XZ = 7.3

Perimeter = XY+YZ+XZ = 17.7 units (C)

3) A(0, 4), B(4, 1), C(4, -4), D(-4, -4), E(-4, 1)

AB = $\sqrt{(x_2-x_1)^{2}+(y_2-y_1)^{2}}$

= $\sqrt{(4-0)^{2}+(1-4)^{2} }$

= √25 = 5 units

BC = 5 units

CD = 8 units

DE = 5 units

AE = 5 UNITS

Perimeter = 28 units (B)

4) . T(-5, 0), U(7, 3), V(9, -6), W(-3, -9)

TU = $\sqrt{(x_2-x_1)^{2}+(y_2-y_1)^{2}}$

= $\sqrt{(7+5)^{2}+(3-0)^{2} }$

= √153 = 12.4 units

UV = 9.2 units

VW = 12.4 units

TW = 9.2 units

Perimeter = 43.2 units (D)

5) S(-1, 6), T(-1, -8), U(7, -8)

ST = $\sqrt{(x_2-x_1)^{2}+(y_2-y_1)^{2}}$

= $\sqrt{(-1+1)^{2}+(-8-6)^{2}}$

= 14 units

TU = 8 units

SU = 16.1 units

Perimeter = 38.1 units (A)

6) A(-7, 0), B(-3, 5), C(2, 1), D(-2, -4)

AB = $\sqrt{(x_2-x_1)^{2}+(y_2-y_1)^{2}}$

= $\sqrt{(-3+7)^{2}+(5-0)^{2}}$

= 6.4 units units

BC = 6.4 units

CD = 6.4 units

AD = 6.4 units

Perimeter = 25.6 units (F)

6 0

3 years ago

What are the coordinates of Point B? (4, -3) (-4, 3) (3, -4) (-3, 4)

Snowcat [4.5K]

Answer:

( -4 , 3 )

Step-by-step explanation:

Knowing that "y" is the line going up and down and "x' is the line going left to right.

Quadrant | = ( + , + )

Quadrant || = ( - , +)

Quadrant ||| = (- , - )

Quadrant |v = ( + , - )

Refer to image below if needed.

Hence, from the given we can conclude the following:

Quadrant || = ( - , +)

( x , y )

x = -4

y = 3

Thus, we have:

( -4 , 3 )

Therefore, the correct answer is ( -4 , 3 )

Kavinsky

4 0

2 years ago

Read 2 more answers

The angles in a triangle are in the ratio 3:2:1.

ivolga24 [154]

Answer:

see explanation

Step-by-step explanation:

(a)

sum the parts of the ratio, 3 + 2 + 1 = 6 parts

The sum of the 3 angles in a triangle = 180° , then

180° ÷ 6 = 30° ← value of 1 part of the ratio , then

3 parts = 3 × 30° = 90°

2 parts = 2 × 30° = 60°

1 part = 30°

The angles in the triangle are 90°, 60°, 30°

Thus the triangle is right angled

(b)

The shortest side is opposite the smallest angle, that is opposite 30°

Using the sine ratio in the right triangle and the exact value

sin30° = $\frac{1}{2}$

sin30° = $\frac{opposite}{hypotenuse}$ = $\frac{opposite}{25}$ = $\frac{1}{2}$ ( cross- multiply )

2 × opposite = 25 ( divide both sides by 2 )

opposite = 12.5

That is shortest side is 12.5 cm

4 0

3 years ago

35.15 × 3.7= <img src="https://tex.z-dn.net/?f=35.15%20%5Ctimes%203.7" id="TexFormula1" title="35.15 \times 3.7" alt="35.15

8090 [49]

The answer is 130.055

5 0

3 years ago

Read 2 more answers

Alguien me ayuda con esto?

lord [1]

Answer:

x=10

Step-by-step explanation:

10 a 8 son dos, entonces 14 ax es 4

3 0

3 years ago

Read 2 more answers