All categories

3 years ago

How many solutions does the equation −2a + 2a + 7 = 8 have? One Two None Infinitely many

Mathematics

2 answers:

aleksandrvk [35]3 years ago

5 0

Answer:

no solutions

Step-by-step explanation:

−2a + 2a + 7 = 8

Combine like terms

7 = 8

This is never true so there are no solutions

lakkis [162]3 years ago

3 0

Infinitely many, as -2a + 2a cancel each other out, so it doesn’t matter what a is currently equal to.

You might be interested in

Aaa help pls with this question

amm1812

It wont open it up, so no one can really help

7 0

4 years ago

Two functions, function A and function B, are shown below:

AURORKA [14]

Answer:

Answer is C.

Step-by-step explanation:

Rate of change of function A is (24- 21)/ 1 = (17-24)/1 = 3.

Rate of change of function B = slope of the line = rise/run = 4/2

= 2

4 0

3 years ago

Read 2 more answers

The answer to this questiom

Vilka [71]

X=80 remove parenthesis, combine like terms, multiply both sides by 20, move constants to the right, subtract, then divide.

3 0

3 years ago

What are the values of a and b

makvit [3.9K]

Answer:

$\large\boxed{B.\ a=8,\ b=4\sqrt5}$

Step-by-step explanation:

We have three similar triangles:

$\triangle ABC\sim\triangle DBA\sim\triangle DAC$

therefore the sides are in proportion:

$\dfrac{AD}{CD}=\dfrac{BD}{AD}$

We have AD = a, CD = 16 and BD = 4. Substitute:

$\dfrac{a}{16}=\dfrac{4}{a}$ <em>cross multiply</em>

$(a)(a)=(16)(4)\\\\a^2=64\to a=\sqrt{64}\\\\a=8$

and other proportion:

$\dfrac{AB}{BC}=\dfrac{BD}{AB}$

We have AB = b, BC = 16 + 4 = 20 and BD = 4. Substitute:

$\dfrac{b}{20}=\dfrac{4}{b}$ <em>cross multiply</em>

$(b)(b)=(20)(4)\\\\b^2=80\to b=\sqrt{80}\\\\b=\sqrt{16\cdot5}\\\\b=\sqrt{16}\cdot\sqrt{5}\\\\b=4\sqrt{5}$

3 0

3 years ago

Solve the equation for the red variable.

yawa3891 [41]

Answer:

d/r

Step-by-step explanation:

d = rt

t = d/r

5 0

3 years ago

Read 2 more answers