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Orlov [11]
3 years ago
15

Can help me howMacam mana... ​

Mathematics
2 answers:
Alborosie3 years ago
8 0

Step-by-step explanation:

i)

2(x+2)=7

2x+4=7

2x=7-4

2x=3

x=3/2

ii)3x + y =8 , y=x

3x + x = 8

4x = 8

x = 2

Tresset [83]3 years ago
4 0

Answer:

x = 2

Step-by-step explanation:

2(x+2)=7

2x+4=7

2x=7-4

2x=3

x=3/2

3x + y =8 , y=x

3x + x = 8

4x = 8

x = 2

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She divides it into 4 bags ...

1/2 ÷ 4 = 1/2 x 1/4 = 1/8 pound

There is 1/8 pound of trail mix in each bag.
5 0
3 years ago
What the missing term is
arlik [135]

Answer:

10x . . . . . (Note the sign of the middle term is negative. 10x goes in the box.)

Step-by-step explanation:

The sum of the two roots is ...

... (5 -3i) +(5 +3i) = 10

In a quadratic with leading coefficient 1, the coefficient of the 1st-degree term is the opposite of the sum of the roots. Here, that means the middle term is -10x. The minus sign is given, so the answer is 10x.

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<em>How Do We Know?</em>

When "a" and "b" are roots of a quadratic in x, it has factors (x -a)(x -b). The product of those two factors is ...

... (x -a)(x -b) = x² -(a+b)x +ab

Here, that means the product of the factors (5 -3i)(5 +3i) is ab = 34, which it is. Their sum is (a+b) = 10, so the x-term is -(a+b)x = -10x.

6 0
4 years ago
Which of the following is the missing justification?
Vikki [24]

Answer:

Addition Property of Equality

Step-by-step explanation:

Given expression:

-16+x=8\\x=24

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We will evaluate the given expression and justify the step.

-16+x=8

Using Addition Property of Equality( by this property of equality we can add a number to both sides of the equation without effecting the equality of the equation)

Adding 16 to both sides of the equation.

-16+x+16=8+16

\therefore x=24

8 0
4 years ago
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There were 55 questions in the test.

4 0
3 years ago
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Drag each length to the correct location on the triangle. Each length can be used more than once, but not all lengths will be us
scoray [572]

The measure of the missing side of the right triangle are as follows;

adjacent side = 5√2

hypotenuse =  10

<h3 /><h3>How to find the side of a right triangle?</h3>

A right angle triangle has one of its angles as 90 degrees.

Therefore,

using trigonometric ratios,

tan 45 = opposite / adjacent

tan 45 = 5√2 / a

adjacent side = 5√2 / 1

Therefore,

adjacent side = 5√2

sin 45 = opposite / hypotenuse

hypotenuse = 5√2 / √2 / 2

hypotenuse =  5√2 × 2 / √2

hypotenuse =  10

learn more on right triangle here: brainly.com/question/6322314

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