All categories

3 years ago

If a = -9 and b = -4, what is the value of a + b? -5 5 13 -13

Mathematics

1 answer:

zimovet [89]3 years ago

8 0

Answer: -13

Step-by-step explanation:

a + b

-9 + -4 = -13

You might be interested in

Solve the system by substitution. -x-y-z=-8 -4x+4y+5z=7 2x+2z=4

alexandr402 [8]

1. x=−y+8−z 2.x=−7−4y−5z (everything over 4) 3.x=2−z 1.y=-x+8-z 1.z=-x+4-y 2.y=7+4x-5x (everything over 4) 2.z=7+4x-4y (everything over 5) 3.z=2-x

5 0

4 years ago

Triangle DEF is shown below.

just olya [345]

Answer:

A triangle similar to DEF will have an angle that measures 45 degrees, an angle that measures 65 degrees, and an angle that measures 70 degrees

Step-by-step explanation:

Given

See attachment for complete question

Required

Angles of a triangle similar to $\triangle DE F$

First, calculate the angle at D

$D + 110^o = 180^o$ ---- angle on a straight line

Collect like terms

$D = 180^o - 110^o$

$D = 70^o$

Next, calculate the angle at F

$F + 135^o = 180^o$ ---- angle on a straight line

Collect like terms

$F = 180^o -135^o$

$F = 45^o$

Lastly, the angle at E

$D + E + F = 180^o$ --- angles in a triangle

Make E the subject

$E = 180^o - D - F$

$E = 180^o - 70^o - 45^o$

$E = 65^o$

A triangle similar to $\triangle DE F$ will have 45, 70 and 65 degrees as its angles

6 0

3 years ago

Can somebody help me

Sergeeva-Olga [200]

$cis(x)=\cos x+i\sin x\\\\cis15^o=\cos15^o+i\sin15^o\\\\\cos15^o=\dfrac{\sqrt6+\sqrt2}{4};\ \sin15^o=\dfrac{\sqrt6-\sqrt2}{4}\\\\\text{therefore}\\\\7cis15^o=7\left(\cos15^o+i\sin15^o\right)=7\cos15^o+7i\sin15^o\\\\=7\left(\dfrac{\sqrt6+\sqrt2}{4}\right)+7\left(\dfrac{\sqrt6-\sqrt2}{4}\right)i$

6 0

3 years ago

The shape on the left is transformed on the right.Which of the statements describes the transformation.

Georgia [21]

Answer:

yall werid

Step-by-step explanation:

4 0

2 years ago

Plzz answer number B

likoan [24]

Answer:

4 hours

Step-by-step explanation:

It drives 240 miles per 2 hours so then 480 will be 2+2 = 4 hours

240+240 = 480

3 0

3 years ago