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GalinKa [24]
1 year ago
6

Use the distributive property. 4(5x + 3y - 7) = 20x + 12y + [?]

Mathematics
2 answers:
katen-ka-za [31]1 year ago
6 0

Answer:

- 28

Step-by-step explanation:

4(5x + 3y - 7) ← multiply each term in the parenthesis by 4

= 20x + 12y - 28

Grace [21]1 year ago
3 0
4(5x+3y-7)=20x+12y+(-28)
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One of the legs of a right triangle is twice as long as the other, and the perimeter of the triangle is 35. Find the
Aloiza [94]

Answer:

6.68, 13.37, 14.95

Step-by-step explanation:

One of the legs is twice as long as the other.

b = 2a

The perimeter is 35.

35 = a + b + c

The triangle is a right triangle.

c² = a² + b²

Three equations, three variables.  Start by plugging the first equation into the second and solving for c.

35 = a + 2a + c

c = 35 − 3a

Now plug this and the first equation into the Pythagorean theorem:

(35 − 3a)² = a² + (2a)²

1225 − 210a + 9a² = a² + 4a²

1225 − 210a + 4a² = 0

Solve with quadratic formula:

a = [ -(-210) ± √((-210)² − 4(4)(1225)) ] / 2(4)

a = (210 ± √24500) / 8

a ≈ 6.68 or 45.82

Since the perimeter is 35, a = 6.68.  Therefore, the other sides are:

b ≈ 13.37

c ≈ 14.95

8 0
3 years ago
A team of psychologists studied the effect of multitasking on the completion of cognitive tasks. A group of 40 women participate
kakasveta [241]

Answer: Matched-pairs t-test

Step-by-step explanation:

5 0
3 years ago
A QUINTA PARTE DA MESADA DE DANIEL CORRESPONDE A R$ 60,00. QUANTO ELE GANHA<br> DE MESADA?
WINSTONCH [101]

Answer:

300

Step-by-step explanation:

60 x 5 = 300

6 0
3 years ago
Help me please I NEED to pass this
Alina [70]

OPTION C is the correct answer.

Hope it helps you.

4 0
3 years ago
If EFGH is a parallelogram, what is the value of x?
Leokris [45]
To be a parallogram the 2 angles shown need to equal 180 degrees
 
so we have: 34 + (4x-2) = 180

 now we can solve for x

34 + 4x -2 = 180

simplify the left side by subtracting 2 from 34

32+4x =180

subtract 32 from each side:

4x = 148

divide both sides by 4 to get x

x = 148 / 4 

x = 37 

The answer is B





5 0
3 years ago
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