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3 years ago

Solve for a. -16-7a=5

Mathematics

2 answers:

grin007 [14]3 years ago

8 0

Answer:

-3

Step-by-step explanation:

take 16 add it to the 5 you get 21

then you take 21 divided by -7 and you get -3

hope it helps

baherus [9]3 years ago

3 0

Answer:

A = -3

Step-by-step explanation:

-16-7(-3)=5

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What is the answer for -3 1/2x3/14=

Veseljchak [2.6K]

I got -0.75. But is that a 3 and 1/2 or just 3?

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3 years ago

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Nancy is checking to determine if the expressions x + 4 + x and 6 + 2 x minus 2 are equivalent. When x = 3, she correctly finds

nataly862011 [7]

Answer:

The value of the second expression is 14, so the expressions are equivalent.

Step-by-step explanation:

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The length of a rectangle is 4 meters longer than the width. if the area is 21 square meters, find the rectangle's dimensions.

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The length of a rectangle is 4 meters longer than the width. if the area is 21 square meters, find the rectangle's dimensions. round to the nearest tenth of a meter.

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4 years ago

Equation of the parabola in vertex form that passes through (4,-7) and has a vertex of (1,-6)

Alina [70]

$y = -\frac{1}{9}(x - 1)^2 - 6$

Step-by-step explanation:

The vertex form of the equation for a parabola is given by

$y = a(x - h)^2 + k$

where (h, k) are the coordinates of the parabola's vertex. Since the vertex is at (1, -6), we can write the equation as

$y = a(x - 1)^2 - 6$

Also, since the parabola passes through (4, -7), we can use this to find the value for a:

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Therefore, the equation of the parabola is

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3 years ago

What is the length of DE

HACTEHA [7]

Answer:

DE = 20units

Step-by-step explanation:

In Δ ABC,

angle A is congruent to angle B.... (given)

therefore, ΔABC is an isoceles triangle.

therefore, CA = CB..... (side opposite to congruent angles are congruent in an isoceles triangle)

therefore, CB = 4 units

In ΔCDE,

angle D is congruent to angle E.... (given)

therefore, ΔCDE is an isoceles triangle.

therefore, CD = CE

therefore, CD = 8 units

ΔCDE ~ ΔCBA

therefore,

$\frac{cd}{cb} = \frac{ce}{ca} = \frac{de}{ab} \\ therefore \: \frac{8}{4} = \frac{8}{4} = \frac{de}{10 } \\ therefore \\ \frac{2}{1 } = \frac{de}{10 } \\ de \: = 2 \times 10 = 20units$

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3 years ago