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Vitek1552 [10]
3 years ago
3

Explain by showing your work please! HELP ASAP!

Mathematics
2 answers:
Alecsey [184]3 years ago
7 0
X=-4

-2x + 7 = 15

-2x = 15 - 7

-2x = 8 divide both sides by -2

X= -4

umka21 [38]3 years ago
5 0

- 2x + 7 = 15  \\   - 2x = 8 \\ x =  - 4

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Find the value of x.
Gala2k [10]

Answer:

\large\boxed{2\sqrt7}

Step-by-step explanation:

Look at the picture.

ΔADC and ΔACB are similar. Therefore the corresponding sides are in proportion:

\dfrac{AC}{AD}=\dfrac{AB}{AC}

We have

AC=x,\ AD=2,\ AB=2+12=14

Substitute:

\dfrac{x}{2}=\dfrac{14}{x}           <em>cross multiply</em>

x^2=(2)(14)\\\\x^2=28\to x=\sqrt{28}\\\\x=\sqrt{4\cdot7}\\\\x=\sqrt4\cdot\sqrt7\\\\x=2\sqrt7

5 0
4 years ago
Nicole bought a new TV at Target for $384.87. if the TV was on sale for 25% off and she paid with her red card which earned her
Mashutka [201]
Let x = the original price.

With 25% off, the price drops to
0.75x.
With another 5% off, the price drops to
0.95*(0.75x) = 0.7125x
Add 8.25% tax, and the price goes up to
1.0825*(0.7125x) = 0.7713x

This is equal to the amount paid, so
0.7713x = 384.87
x = 384.87/0.7713 = $498.99

Answer: Original price = $498.99
5 0
3 years ago
Select the three number bonds that represent factor pairs of the number 56. CLEAR CHECK Number bond: 1 times 56 = 56. Number bon
Ray Of Light [21]

Answer:

The answer is -

Number bond: 1 times 56 = 56.

Number bond: 4 times 14 = 56.

Number bond: 7 times 8 = 56.

Step-by-step explanation:

We can define a factor pair as a set of two factors, which, when multiplied together, give a particular product.

For example -

5 and 6 are factors of 30 because 5×6 = 30

Now,

Given -

Number bond: 1 times 56 = 56.                         ...................(1)

Number bond: 4 times 14 = 56.                         ...................(2)

Number bond: 5 times 6 = 56.                         ...................(3)

Number bond: 7 times 8 = 56.                         ...................(4)

In equation (1)

1 times 56 = 1×56 = 56

⇒1 and 56 are the factor pairs of 56

Satisfies

In equation (2)

4 times 14 = 4×14 = 56

⇒4 and 14 are factor pairs of 56

Satisfies

In equation (3)

5 times 6 = 5×6 = 30 ≠ 56

⇒5 and 6 are not factor pairs of 56

Not Satisfies

In equation (4)

7 times 8 = 7×8 = 56

⇒7 and 8 are factor pairs of 56

Satisfies

∴ we get

The answer is -

Number bond: 1 times 56 = 56.

Number bond: 4 times 14 = 56.

Number bond: 7 times 8 = 56.

6 0
3 years ago
Please Help Thank You ( for brainliest )
damaskus [11]
They are congruent is the answer
6 0
3 years ago
Read 2 more answers
Find the product (-21) x (-30)​
nekit [7.7K]

Answer:

630

Step-by-step explanation:

(-21) × (-30)

21×30 Since 2 negatives multiplied to make a positive

Answer is 630

8 0
3 years ago
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