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Nutka1998 [239]

2 years ago

13

A zoo has 65 birds now. It adopted 17 new birds last week. How many birds did the zoo have before it adopted the new birds? Writ

e and solve an equation. Then write the answer.

1 answer:

svetoff [14.1K]2 years ago

6 0

Correct me if I’m wrong but I believe the answer is 48

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Decimal Operati<br> 1. Find the sum of the expression.<br> 0.975 + 3.8

BlackZzzverrR [31]

Answer:

4.775

Step-by-step explanation:

3 0

3 years ago

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A 7-foot ladder is leaned against a building in such a way that the bottom of the ladder is 4 feet from the base of the wall. Fi

sladkih [1.3K]

The ground, the building, and the ladder form a right triangle, in which
the leaning ladder is the hypotenuse.

For the angle between the ladder and the ground, the 4-ft along the ground
is the side adjacent to the angle, and the 7-ft ladder is the hypotenuse.

   (adjacent side) / (hypotenuse) = cosine of the angle.

   Cosine(a) = 4/7 = 0.57143... (rounded)

      Angle 'a' = <em>55.15 degrees</em> (rounded)

7 0

3 years ago

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Find the coordinates of the midpoint of a segment with the endpoints (16,5) & (28,-13)

frutty [35]

$\text{The formula of the midpoint of a segment with the end points:}\\\\A(x_A;\ y_A)\ \text{and}\ B(x_B;\ y_B)\\\\M_{AB}=\left(\dfrac{x_A+x_B}{2};\ \dfrac{y_A+y_B}{2}\right)$

$\text{We have:}\\A(16;\ 5)\to x_A=16;\ y_A=5\\B(28;\ -13)\to x_B=28;\ y_B=-13\\\\\text{substitute:}\\\\M_{AB}=\left(\dfrac{16+28}{2};\ \dfrac{5+(-13)}{2}\right)=\left(\dfrac{44}{2};\ \dfrac{-8}{2}\right)=(22;\ -4)$

7 0

3 years ago

Andrew was working on a project for Science class. He began working on the project at 10:32 a.m. When he finally

Amanda [17]

Answer:

3 hours 43 minutes

3 0

3 years ago

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Given that 2x-7y=30

lidiya [134]

Answer:

y = - $\frac{24}{7}$

Step-by-step explanation:

Substitute x = - 3 into the expression

2x - 7y = 30

2(- 3) - 7y = 30

- 6 - 7y = 30 ( add 6 to both sides )

- 7y = 36 ( divide both sides by - 7 )

y = $\frac{36}{-7}$ = - $\frac{36}{7}$

4 0

2 years ago