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3 years ago

Algebra please help!!! 10 points!

Mathematics

2 answers:

Goryan [66]3 years ago

4 0

Answer:

12+8=x or x-8=12 and they collected 20 leaves yesterday

Step-by-step explanation: Since they collected 8 fewer today, to find yesterday u would have to add. 12+8=20. PS idk if that makes sense srry

Mademuasel [1]3 years ago

3 0

They collected 20 leaves yesterday

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Bryce wrote the linear regression equation y=1.123x-6.443 to predict the armspan, y, of a person who is x inches tall. Riley has

Harrizon [31]

For this case what you should do is use the linear equation that Bryce wrote and replace the corresponding value of y which is 67.5 inches. Then, you must clear x to find the height.
We have
y = 1.123x-6.443
67.5 = 1.123x-6.443
Clearing x
x = (67.5 + 6.443) / (1.123) = 65.84
The best prediction of Riley's height is 65.84 inches.
answer
B) 65.84 inches

5 0

3 years ago

Read 2 more answers

2) The coordinates of the vertices of quadrilateral ABCD are A(-1,8),

Verizon [17]

Answer:

The coordinates of vertices of A'B'C'D' are:

A'(1,-8), B'(0,-4), C'(2,-1) and D'(4,-3)

Step-by-step explanation:

When a point (h,k) is roated 180 degrees about the origin it becomes (-h,-k) which means that the new point after rotation is the negative of the previous.

Given vertices are:

A(-1,8), B(0,4), C(-2,1), and D(-4,3)

The new vertices will be:

$A(-1,8) => A'(1,-8)\\B(0,4)=> B'(0,-4)\\C(-2,1)=> C'(2,-1)\\D(-4,3)=> D'(4,-3)$

The coordinates of vertices of A'B'C'D' are:

A'(1,-8), B'(0,-4), C'(2,-1) and D'(4,-3)

3 0

3 years ago

What is the ordinate of the point where the graph of the<br> equation y = 5x + 2 crosses the y-axis?

eimsori [14]

Answer:

(0,2)

Step-by-step explanation:

in any y = mx + b formula, b is always the y intercept, and the y intercept is just a fancy name for where the line first crosses the y axis. hope this helps!

8 0

3 years ago

Simplify 7 square root of 3 end root minus 4 square root of 6 end root plus square root of 48 end root minus square root of 54

Katen [24]

$7\sqrt3-4\sqrt6+\sqrt{48}-\sqrt{54}\\\\=7\sqrt3-4\sqrt6+\sqrt{16\cdot3}-\sqrt{9\cdot6}\\\\=7\sqrt3-4\sqrt6+\sqrt{16}\cdot\sqrt3-\sqrt9\cdot\sqrt6\\\\=7\sqrt3-4\sqrt6+4\sqrt3-3\sqrt6\\\\=\boxed{11\sqrt3-7\sqrt6}$

3 0

3 years ago

One angle of an isosceles triangle measures 26°. Which other angles could be in that isosceles triangle?

Julli [10]

Answer:

There are two answers, either of which would work

26°, 26° and 128°
26°, 77° and 77°

Method:

An isosceles triangle has 2 of the same sides so there are two possible answers:

1) 26° is one of the angles which is the same as another. 26° × 2 = 52° and since there are 180° in a triangle the other angle is 180° - 52° which is 128°. This would make the angles 26°, 26° and 128°

2) 26° is not one of the angles which is the same as another. Since there are 180° in a triangle, the other angles would both be 2 ÷ (180° - 26°) which is 77°. This would make the angless 26°, 77° and 77°

3 0

3 years ago